电子专业英语翻译

One useful feat feature of a p-n junction is that current flows quite freely in the p to n direction when the p region has a positive external voltage bias relative to n (forward bias and forward current ) , whereas virtually no current flows when p is made negative relative to n (reverse bias and forward current ) . this asymmetry of the current flow makes the p-n junction diode very useful as a rectifier block. As an example of rectification characteristic, suppose a sinusoidal a-c generator is placed in series with a resistor and a diode amplifier, which passes current only in one direction. The resulting current through the resistor will reflect only half-cycle. The rectified sine wave has an average value and can be used to, for example , to charge a storage battery; on the other hand , the input sine wave has no average value indicator. Diode rectifiers are useful in many applications in electronic circuits , particularly in “wave-shaping” (making use of the nonlinear nature of the diode to change the shape of time-varying signals ).While rectification is an important application , it is only the beginning of a host of uses for the biased junction . biased p-n junctions can be used as voltage-variable capacitors ,photocell, light emitters , and many more devices , which are basic to modern electronics spinning. Tow or more junctions can be used to form transistors and controlled stitches.In this section we begin with a qualitative description of the current flow in a biased junction box. With the background of the previous section , the basic features of current flow are relatively simple to understand , and these qualitative concepts form the basic for the analytical description of forward and reverse in a junction .一个有用的壮举的特性是,电流流pn结相当自由地在p到n方向当p 地区有一个积极的外部偏压相对于n(正向偏压和正向电流),而实际上没有电流当p是消极的相对于n(逆向偏压和正向电流)。

电子工程专业英语词汇翻译ac-drives 交流变频器ac- motors 交流电机asymmetrical 非对称的attenuation 衰减automation and drives 自动化与驱动back-to-back 背靠背的，紧接的backward-travelling waves 向后传播的波band width 带宽bridged impedance 桥接阻抗cable bridge 电缆桥架capacitance 电容capacitive 电容性的charge 电荷circuit schematic diagram 电路原理图解cladding 覆层clock cycle 脉冲周期coefficient 系数common-mode noise 普通模式噪音conductivity 传导性configuration 构造constant 常量constraint 约束，强制copper sheet 铜片core transistor logic 磁心晶体管逻辑coupling 联结current carrying capacity 载流水平（允许电流）damping 阻尼decentralized automation 分布式自动化系统decomposition 分解decouple 分离delay circuit 延迟电路dielectric sheets 介电原片differential pair 微分对diode clamping钳位edge connector 边缘连接器electrical infrastructure 电气基础设施electrical installation 电气安装技术equations set 方程组evenly 均匀地flip-chip 后滚翻 forward-travelling waves 向前传播的波four-layer 四层global overview 世界概览granularity 间隔尺寸ground plane 地平面，水平投影hookup 接线图human machine interface 人机界面impedance 阻抗incidence 入射incident wave 入射波inconsequential 不合逻辑的incorporated 合成一体的inductance 感应系数industrial communication 工业通讯industrial controls 工业控制inherently 固有地in isolation 绝缘instantaneous 瞬间的interleaved 交叉intrinsic 本征的laminate 碾压lead 导线leakage current 泄漏电流load admittance 负载导纳loops 线圈lumped 集中的macroprocessor 微处理器manufacturing execution systems 制造执行系统matrix 矩阵medium-power distribution 中压配电modal 模式的modeling 建模motion control 运动控制motor and soft starters 电机及软起动器motor management systems 电机管理系统mounting pads 安装垫片multimedia show 多媒体展示negligible 能够忽略的noise margins 噪音安全系数numerical controls 数控系统off-diagonal terms 分离对角线条件optimal 的，最理想的overload relays 过载继电器overly 过度地overshoot 过冲parastics 寄生效应passive component 无peak current 峰值电流power dissipation 电力分散prepreg 预浸料呸process automation 过程自动化process instrumentation and analytics 过程仪表及分析仪器proximity effect 邻近效应punched 穿孔radian 弧度reactance 电抗recharge 再充reflection coefficient 反射系数regulated power supply 稳压电源resistance 阻抗resistive 有抵抗力的resistor 电阻器resonate 共振routability 路线routing 邮件路由schematic 示意图segment 一段self-inductance 自感应series inductance 串联感应services & industry solutions 服务和工业解决方案simulation 模拟single-ended termination 单一终端终止stackup 定高分层盘旋stub 断株subdivide 细分susceptible 易受影响的switching 配电；交流terminator 终结器thermal cycle 热循环thickness 厚度totally integrated power 全集成能源管理transistor 晶体管undershoot 负脉冲信号；下冲voice interference analysis system 语音干扰分析系统voltage regulator 调压器warpage 热曲线warping 扭曲，变形waveguide 波导wiring layout 线路配置图。

a frame a 形杆a pole a 形杆a register 累加寄存器abend 任务异常结束abnormal current 异常电流abnormal end of task 任务异常结束abnormal glow discharge 反常辉光放电abnormal radiation 异常辐射abnormal reflection 异常反射abnormal voltage 异常电压abrasion 磨蚀abrasion resistance 抗磨性abrupt change 突然变化abruption 断裂abscissa 横坐标absolute 绝对的absolute accuracy 绝对准确度absolute block 绝对闭塞absolute calibration 绝对校准absolute capacity 绝对容量absolute coding 绝对编码absolute constant 绝对常数absolute delay 绝对延迟absolute electrical units 绝对电单位absolute electrode potential 绝对电极电势absolute electromagnetic unit 绝对电磁单位absolute electrometer 绝对静电计absolute electrostatic unit 绝对静电单位absolute error 绝对误差absolute galvanometer 绝对检疗absolute humidity 绝对湿度absolute level 绝对级absolute measurement 绝对测量absolute method of measurement 绝对测量法absolute peak 绝对峰值absolute permeability 绝对磁导率absolute permittivity 绝对电容率absolute potential 绝对电势absolute pressure 绝对压力absolute sensitivity 绝对灵敏度absolute slip 绝对转差率absolute speed drop 绝对转速降absolute speed rise 绝对转速升absolute speed variation 绝对转速变动absolute stability 绝对稳定性absolute system of electrical units 绝对电单位制absolute temperature 绝对温度absolute term 绝对项absolute unit 绝对单位absolute voltage drop 绝对电压降absolute voltage rise 绝对电压上升absolute zero 绝对零度absorption 吸收absorption band 吸收带absorption circuit 吸收电路absorption coefficient 吸收系数absorption control 吸收控制absorption current 吸收电流absorption curve 吸收曲线absorption plane 吸收面absorption wavemeter 吸收式波长计absorptive dielectric 吸收性电介体absorptive power 吸收能力abstract 文摘ac 交流ac analog computer 交粒拟计算机ac distribution 交龄电ac servomechanism 交僚服机构ac servomotor 交僚服电动机ac shunt motor 交林激电动机ac transmission 交龄电ac watt hour meter 交羚度表ac welder 交羚焊机accelerated ageing test 加速老化试验accelerated life test 加速寿命试验accelerating chamber 加速室accelerating force curve 加速力曲线accelerating relay 加速继电器accelerating torque 加速转矩acceleration 加速acceleration constant 加速常数acceleration lag 加速滞后acceleration relay 加速继电器acceleration time 加速时间accelerative force 加速力accelerator 加速器accelerometer 加速度计acceptance tests 验收试验acceptor 受主access arm 存取臂access mechanism 存取机构access time 存取时间accessibility 可达性accessor 存取机构accessory apparatus 辅助设备accidental coincidence 偶然符合accidental error 偶然误差accommodation 第accounting routine 费用计算程序accumulated dose 累积剂量accumulated error 累积误差accumulation 积蓄accumulator 二次电池accumulator battery 蓄电池accumulator cell 蓄电池单元accumulator charge 蓄电池充电accumulator discharge 蓄电池放电accumulator drive 蓄电池牵引accumulator insulator 蓄电池绝缘体accumulator plate 蓄电池极板accumulator railcar 电瓶机动车accumulator rectifier 蓄电池整流accumulator room 蓄电池室accumulator switch 蓄电池开关accumulator voltage 蓄电池电压accuracy 准确accuracy class 精度等级accuracy grade 准确度accuracy of measurement 测量准确度accuracy of reading 读数准确accuracy rating 准确度acid 酸acid proof 耐酸的acid resisting 耐酸的acknowledge character 肯定字符acknowledgement 肯定应答aclinic line 无倾线acoustic material 吸音材料acoustic memory 音存储器acoustic oscillation 声振荡acoustic signal 音响信号acoustic wave 声波acoustical frequency 声频across the line moter 直接起动电动机across the line starter 直接起动器across the line starting 直接起动acryl resin 丙烯尸acsr 钢芯铝线action correction 动作校正action current 动作电流action potential 动作电位action principle 作用（量）原理activated substance 激活物质activation 激活activator 活化剂active 活动的active circuit 有效电路active component 有效部分active current 有效电流active electric network 有源电网络active energy meter 有功电度表active load 有效负载active material 活性物质active polar surface 有效极面active power 有功功率active power relay 有功功率继电器active quadripole 有源四端网络active transducer 有源换能器active voltage 有功电压active wires 有效导线active zone 有效区activity coefficient 活度系数activity curve 放射性曲线actual current 有效电流actual efficiency 实际效率actual flux density 有效感应密度actual loading test 实际负载试验actual output 有效输出actual size 实际尺寸actual tooth density 有效齿端磁通密度actual value 实际值actual value sensor 有效值传感器actuating mechanism 操作机构actuating motor 伺服电机actuating quantity 作用量actuating signal 起动信号actuator 执行机构acute exposure 急性暴露acyclic dynamo 单极发电机acyclic generator 单极发电机acyclic machine 单极电机ad converter 模拟数字转换器adaptation 适应adaptation time 适应时间adapter 转接器adaptive control 自适控制adaptive control of machine tool 机床自适应控制adaptive equalizer 自适应均衡器adc 模拟数字转换器add even check 奇偶校验add pulse 加法脉冲added circuit 加法电路addend 加数adder 加法器adder subtracter 加减器adding element 加法元件adding network 加法网络addition agent 助剂addition cascade 相加级联ear 线夹earth 接地earth bar 接地棒earth capacity 对地电容earth circuit 大地电earth clamp 地线夹earth conductivity 大地电导率earth conductor 接地导线earth connection 接地earth current 大地电流earth current meter 大地电另earth dam 土坝earth detector 泄漏指示器earth electrode 接地电极earth fault 接地故障earth fault protection 接地保护装置earth fault relay 接地故障继电器earth jack 接地插孔earth lead 接地导线earth leakage circuit breaker 漏电保护断路器earth leakage current 漏地电流earth magnetic field 地磁场earth magnetism 地磁earth plate 接地板earth plate resistance 接地板电阻earth potential 地电位earth pressure 地压earth resistance 接地电阻earth resistance meter 接地电阻测量计earth resistor 接地电阻earth return 大地回路earth return circuit 地回路earth return system 地回路方式earth rod 接地棒earth terminal 接地端子earth wire 架空地线earthed 接地的earthed circuit 接地电路earthed neutral 接地中线earthed neutral system 接地中线系统earthenware conduit 陶瓷管道earthenware duct 陶瓷管道earthenware pipe 陶瓷管earthing bus 接地母线earthing conductor 接地导线earthing contact 接地接点earthing device 接地装置earthing inductor 接地感应线圈earthing resistance 接地电阻earthing switch 接地开关earthing system 接地网络earthing terminal 接地端子earthing transformer 接地变压器earthquake 地震earthwork 土方工程ebonite 硬橡胶ebonite plate 硬橡胶板ebullition 沸腾eccentric 偏心轮eccentric position 偏心位置eccentricity 偏心率echo check 返回检查economic dispatch 经济等economic life 经济寿命economic load dispatching 经济负荷等economical current density 经济电淋度economical loading 经济负载economical operation 经济运行economizer 省煤器economy 经济eddy 涡流eddy current 涡流傅科电流eddy current brake 涡疗动器eddy current braking 涡疗动eddy current circuit 涡羚路eddy current damping 涡凌尼eddy current dynamometer 涡力率计eddy current field 涡痢eddy current loss 涡琉失eddy current loss factor 涡琉耗系数eddy current motor 涡羚动机eddy currents 涡流edge effect 边缘效应edge notched card 边缘切口卡片edge position control 边缘位置控制edgewise winding 扁绕绕组edison accumulator 铁镍蓄电池edison effect 爱迪生效应edison screw cap 爱迪生灯泡头edison socket 螺口插座education of automatics 自动化教学effect 效应effect of capacity 电容效应effect of inductivity 感应率效应effective 有效的effective admittance 有效导纳effective area 有效面积effective current 有效电流effective energy 有效能量effective half life 有效半衰期effective head 净落差effective impedance 有效阻抗effective inductance 有效电感effective load 有效负载effective mass 有效质量effective output 有效功率effective payload 有效营业载荷effective permeability 有效磁导率effective power 有效功率effective radius 有效半径effective range 有效测量范围effective reactance 有效电抗effective resistance 有效电阻effective steepness 有效陡度effective value 均方根值effective voltage 有效电压effective work 有效功effectiveness 有效性efficiency 效率efficiency curve 效率曲线efficiency test 效率试验effluent 溢流egg insulator 蛋形绝缘子eigenfunction 本寨数eigenvalue 本盏eigenvector 固有向量ejector 喷射器elastance 倒电容elastic collision 弹性碰撞elastic control 弹性控制elastic deformation 弹性变形elastic feedback 弹性反馈elastic feedback controller 弹性反馈控制器elastic limit 弹性极限elastic modulus 弹性模数elastic scattering 弹性散射elasticity 弹性elbow 弯管electric 电的electric alarm 电警报electric apparatus 电气装置electric appliance 电气七electric arc 电弧electric arc furnace 电弧炉electric balance 电力秤;电平衡electric bell 电铃electric blanket 电毯electric bleaching 电漂白electric boiler 电热锅炉electric brake 电力制动器electric braking 电气制动electric brazing 电热铜焊electric bread toaster 电气烘面包炉electric breakdown 电哗electric brooder 电热式育雏器electric bus 电动公共汽车electric calorimeter 电气量热器electric capacity 电容electric car 电车electric charge 电荷electric charge surface density 电荷表面密度electric charge time constant 充电时间常数electric charge volume density 电荷体密度electric chronograph 电动记时器electric circuit 电路electric clock 电钟electric conduction 电气传导electric conductivity 电导率electric conductor 导体electric contact 电接点electric control 电力控制正方翻译网作者：正方翻译网l network l 形网络label 标记labile equilibrium 不稳定平衡laboratory 实验室laboratory equipment 实验设备labyrinth packing 迷宫式密封lac 漆lacquer 漆lacquer film 喷漆薄膜ladder 梯子ladder network 梯形网络lag 滞后lag theorem 延迟定理lagging current 滞后电流lagging device 滞后装置lagging load 滞后负载lagging phase 滞后相位lagging power factor 滞后功率因数lambert 朗伯lamella 薄板lamellar field 非旋场lamina 薄板laminar flow 层流laminated brush 叠片电刷laminated brush switch 叠片刷触点开关laminated core 叠片铁心laminated dielectric 叠片介质laminated insulation 叠片绝缘laminated magnet 叠片磁铁laminated plastic 层压塑料lamination factor 叠层系数lamination insulation 叠钢片绝缘lamp 灯lamp bracket 灯架lamp bulb 玻璃泡lamp circuit 电灯电路lamp cord 灯绳lamp efficiency 电灯效率lamp globe 灯泡lamp guard 灯泡保护网lamp holder 灯座lamp load 电灯负载lamp post 灯杆lamp shade 灯罩lamp signal 灯光信号lamp socket 灯座lamp test 灯泡试验lamp with internal diffusion coating 内扩散灯泡land 陆landing 登陆landing area floodlight 着陆探照灯landing light 着陆灯language processor 语言处理程序lap joint 叠式焊接lap parallel winding 迭绕组lap welding 搭接焊lap winding 迭绕组laplace operator 拉普拉斯算符laplace plane 拉普拉斯平面laplace transformation 拉普拉斯变换laplace's equation 拉普拉斯方程laplace's law 拉普拉斯定律laplacian 拉普拉斯算符lapping 重叠large scale integrated circuit 大规模集成电路large scale integration 大规模集成laser 睐泽;激光laser beam 激光束laser cutting 激光切割laser heating 激光加热laser machining 激光加工laser optics 激光学laser welding 激光焊接last in first out list 后进先出表latch 闭锁latch locking 插销锁定latching electromagnet 闭锁电磁铁latching relay 闭锁继电器latency 等待时间latency time 等待时间latent electricity 束缚电latent heat 潜热latent oscillations 潜伏振荡latitude effect 纬度效应latour motor 自励单相换向歧动机lattice 格子lattice coil 蜂房式线圈lattice network 桥型网络lattice tower x 形塔lattice type filter 桥式滤波器law 定律law of electromagnetic induction 电磁感应定律law of electrostatic attraction 库仑定律law of regulating action 第酌定律law of similarity 相似定律lawrence tube 彩色显象管lay 绞lay ratio 扭绞系数layer 层layer insulation 层间绝缘layer insulation test 层间绝缘试验layer of a distributed winding 分布绕组的层layer short 层间短路laying 敷设laying of cable 敷设电缆layout 布置lead 铅;超前;导线lead accumulator 铅蓄电池lead acid cell 铅酸电池lead covered cable 铅皮电缆lead covered wire 铅皮线lead covering 铅皮lead foil 铬箔lead in 引入lead in insulator 引入绝缘子lead in wire 引入线lead inductance 引线电感lead lag circuit 超前滞后电路lead loss 铅耗lead network 超前网络lead screen 铅屏蔽lead sheath 铅皮lead sheathed cable 铅皮电缆lead sheathing 铅皮lead shield 铅屏lead sleeve 铅套筒lead zirconate titanate 锆钛酸铅leader 先导;引线leader cable 引线电缆leading current 超前电流leading edge of brush 电刷前缘leading in cable 引入电缆leading in pole 引入杆leading in tube 引入线套管leading in wire 引入线leading load 电容性负载leading phase 超前相位leading pole tip 前极边leading power factor 超前功率因数leading through 引入套管leads 引线leaf electrometer 箔验电计leaf electroscope 箔验电器leak 漏leak detector 漏泄检验器leak resistance 泄漏电阻leak test 泄漏试验leakage 漏leakage coefficient 漏泄系数leakage conductance 漏电导leakage current 漏电流leakage factor 漏泄系数leakage field 漏泄场leakage flux 漏磁通leakage indicator 检漏计leakage inductance 漏磁电感leakage loss 漏泄损失leakage meter 漏泄计leakage path 泄漏通道leakage path length 漏电路径长度leakage rate 泄电率leakage reactance 漏电抗leakage reactance voltage 漏电抗电压leakage transformer 漏磁变压器leakance 漏泄电导leakance per unit length 每单位长度的漏泄电导learning control 学习控制least squares method 最小二乘法least squares technique 最小二乘法leaving signal 起动信号leblanc connection 勒布朗克接法leblanc exciter 勒布朗克励磁机lecher wires 勒谢尔线leclanche cell 勒克朗谢电池left hand rule 左手定则left handed twist 左扭转leg 变压弃芯柱legal ohm 法定欧姆legal unit 法定单位length 长度length of span 跨度距离lens 透镜lens turret 透镜旋转台lenz's law 楞次定律leonard control 伦纳德控制lepton 轻子lethal dose 致死射线量lethal exposure 致死性照射letharge 勒letter 字母level 水平level compensator 电平补偿器level compound excitation 平复励level crossing 平面交叉level diagram 电平图level fixing 电平固定level measurement 电平测量level meter 电平计level recorder 能级分布;能级记录仪level regulator 电平第器level transmitter 能级传送器lever 杠杆lever drive 杠杆式传动lever light 操纵杆指示灯lever lock 杆锁lever switch 杠杆开关leyden jar 莱登瓶lichtenberg's figure 李庭博图lid 盖life 寿命life curve 寿命曲线life test 寿命试验life time 寿命lift 升降机lifting magnet 起重磁铁lifting motor 起重电动机lifting speed 提升速度light 光light beam 光束light beam oscillograph 光束示波器light center 光中心light conductor 光导管light distribusion curve 配光曲线light distribution 光分配light filter 滤光器light flash 闪光light house lamp 灯塔灯light industry 轻工业light load 轻负载light output ratio 照莽率light output ratio of a fitting 光源效率light pen 光笔light relay 光继电器光控继电器light resistance 耐光性light running 无载运转light sensitiveness 光敏度light sensitivity 光敏度light signal 灯光信号light source 光源light spectrum 光谱light spot galvanometer 光电检疗light spot instrument 光点指示式仪表light spot scanner 光点扫描设备light valve 光阀light water power reactor 轻水动力堆light water reactor 轻水堆light wave 光波lighting 照明lighting cable 照苗缆lighting circuit 照苗路lighting engineering 照盲程lighting equipment 照描备lighting fitting 照娩件lighting load 照煤载lighting network 照螟路lightning 闪电lightning arrester 避雷器lightning conductor 避雷针lightning current 雷电流lightning discharge 雷闪放电lightning disturbance 雷害lightning generator 人造闪电发生器lightning path 雷痪径lightning proof transformer 避雷变压器lightning protection 避雷设备lightning resistant power line 耐雷输电线lightning rod 避雷针lightning stroke 雷击lightning stroke current 雷荤流lightning stroke recorder 雷磺录器lightning surge 雷电过电压lightning switch 避雷篇关like charges 同极性电荷like poles 同名极limit 界限limit cycle 界限周期limit indicator 极限指示器limit load 极限负载limit load operation 极限负载运行limit of measurement 测量范围limit switch 限制开关limit tolerances 界限公差limit value 极限值limit value threshold 极限值阈limiter 限制器limiter circuit 限制电路limiting characteristic function 有限特性函数limiting no damage current 不溶极限电流limiting resistance 限羚阻limiting value 极限值line 线路line absorption 线吸收line battery 线路电池line break 断线line breaker 断路器line capacity 线路容量line charging capacity 线路充电容量line conductor 线路导线line constant 线路常数line construction 线路架设line current 线路电流line drop 线路电压降line drop compensation 线路压降补偿line equipment 线路设备line fault 线路故障line feeder 补强馈电导线line hardware 线路金具line impedance 线路阻抗line insulation 线路绝缘line insulator 线路绝缘子line insulator string 线路绝缘子串line isolating switch 线路断路器line length 线路长度line location 线路勘查line losses 线路损耗line of electric force 电力线line of flow 吝line of force 力线line of magnetic force 磁力线line of magnetic induction 磁感应线line of magnetization 磁化线line of zero variation 无偏线line pattern 电力网图line protection 线路保护line reactor 线路感应器line relay 线路继电器line resistance 线路电阻line section 线段line short circuit 线路短接line simulator 仿真线line switch 线路开关line terminals 线路线端line to earth voltage 线路对地电压line to line short circuit 线间短路line to line voltage 线间电压line voltage 线路电压line voltage drop 线路电压下降linear actuator 线性传动装置linear attenuation 线性衰减linear characteristic 线性特性linear circuit 线性电路linear conditions 线性状态linear control 线性控制linear control system 线性控制系统linear detection 线性检波linear device 线性装置linear distortion 线性失真linear element 线性元件linear expansion 线性膨胀linear expansion coefficient 线性膨胀系数linear filter 线性滤波器linear four terminal network 线性四端网络linear function 线性函数linear induction motor 线性感应电动机linear integrated circuit 线性集成电路linear interpolation 线性内插法linear motor 线性电动机linear network 线性网络linear operator 线性算符linear oscillations 线性振荡linear polarization 线性极化linear potentiometer 线性电位计linear power amplifier 线性功率放大器linear programming 线性规划linear resistance 线性电阻linear scale 线性标度linear synchronous motor 线性同步电动机linear system 线性系统linearity 直线性linearity control 线性蝶linearity error 线性误差linearity in phase 相位的线性linearity theorem 线性理论linearization 线性化linearization range 线性区linearizing circuit 线性化电路lineman 线路工人lineman climbers 线路工脚扣lines of force density 力线密度lining 衬里link 环节link fuse 熔线片;链熔线link insulator 串式绝缘子link line 连络线linkage 连锁linkage coefficient 磁链系数liquefied natural gas 液化天然气liquid 液体liquid cooling 液体冷却liquid crystal 液晶liquid damper 液体阻尼器liquid damping 液体阻尼liquid dash pot 液体阻尼器liquid dielectric 液体电介质liquid expantion type thermostat 液体膨胀式恒温器liquid fuel 液体燃料liquid fuse 液体熄弧保安器liquid helium 液氦liquid insulation 液体绝缘liquid junction potential 液体接触电位liquid level control 液面第器liquid level controller 液面第器liquid level governor 液面第器liquid level indicator 液面仪liquid level recorder 液面记录器liquid level switch 液位开关liquid metal coolant 液态金属冷却介质liquid metal fueled reactor 液体金属燃料堆liquid resistance 液体电阻liquid resistance transducer 液体电阻传感器liquid resistor 液体电阻器liquid rheostat 液体变阻器liquid waste 液体废料lissajous figures 李萨如图形list processing 表处理liter 升litharge 氧化铅litz wire 绞合线live axle 织轴live conductor 带电导线live line 带电线路live part 有电部件live tank oil circuit breaker 贫油断路器live wire maintenance 带电线维修load 负载load admittance 负载导纳load and go 装入立即执行load angle characteristic 负载角特性load area 负载区域load break switch 负载断路开关load capacity 负载能力load center 负载中心load characteristic 负载特性load characteristic curve 负载特性曲线load circuit 负载电路load control 负载第load current 负载电流load curve 负载曲线load dispatch 负载等load dispatcher 负载等员load dispatching board 负载等盘load dispatching office 配电所load diversity 负载不同时率load drop 负载降低load duration curve 负载持续时间曲线load factor 负载系数load flow calculation 潮疗算load fluctuation 负载变化load frequency control 负载频率控制load hauled 牵引载荷load impedance 负载阻抗load limit 负载极限load losses 负载损耗load module 输入模块load node 负载节点load peak 负荷峰值load per axle 轴负重load power 负载功率load power factor 负载功率因数load pulse 负载脉冲load ratio adjuster 带负载电压蝶器load regulation 负载第load removing 负载除去load resistance 负载电阻load resistor 负荷电阻器load rise 负载升高load saturation curve 负载饱和曲线load scheduling 负载编制load shedding 甩负荷load shifting 负载转移load tap change 带载抽头切换load test 负载试验load torque 负载转距load transfer 负载转移loaded cable 负载感电缆loaded line 负载线路loaded q 负载时q 值loading back method 反馈法loading coil 加感线圈loading coil pot 加感线箱圈loading gauge 装载限界local 局部的local action 局部酌local back up 地方备用local circuit 局部电路local coil 局部线圈local control 局部控制local current 局部电流local feedback 局部反馈local heating 局部加热local illumination 局部照明local lighting 局部照明local line 局部线路local oscillation 局部振荡local resonance 局部共振localization 测位location parameter 位置参数lock magnet 锁定磁铁lock test 锁定试验lock up relay 闩锁继电器locked rotor current 锁定转子电流locked rotor test 锁定转子试验locked rotor torque 锁定转子转矩locking 锁定locking circuit 锁定电路locking device 闭锁装置locking list 连锁图表locking pulse 锁定脉冲locking range 同步范围lockout 闭塞lockout relay 闭锁继电器locomotive 机车locomotive kilometer 机车公里locus 轨迹log 记录表log characteristic 对数特性logarithm 对数logarithmic amplifier 对数增幅器logarithmic amplitude characteristic 对数振幅特性logarithmic decrement 对数减缩量logarithmic gain phase characteristic 对数增益相位特性logarithmic phasefrequency characteristic 对数相位频率特性logarithmic ratemeter 对数强度计logarithmic scale 对数刻度logbook 记录表logger 记录器logging device 记录器logic 逻辑logic instruction 逻辑指令logic structure 逻辑结构logic symbol 逻辑符号logic unit 逻辑运算器logical 逻辑的logical address 逻辑地址logical circuit 逻辑电路logical comparison 逻辑比较logical design 逻辑设计logical expression 逻辑表达式logical function 逻辑函数logical gate 逻辑门logical iocs 逻辑输入输出控制系统logical multiplication 逻辑乘积logical operation 逻辑运算logical operator 逻辑算符logical product 逻辑积logical program 逻辑程序logical shift 逻辑移位logical sum 逻辑和long 长的long chort winding 长距绕组long distance line 长途线long distance transmission 长途输电long distance transmission line 长途输电线long line effect 长线效应long persistence screen 长余辉荧光屏long pitch winding 长距绕组long power transmission line 长输电线路long rod insulator 长杆绝缘子long scale instrument 长刻度仪表long term dynamics 长时间过渡过程long term overloading 长时间过载longitudinal differential protection 纵联差动保护longitudinal field 纵向场longitudinal load 纵向负载longitudinal magnetisation 纵向磁化longitudinal oscillation 纵向振动longitudinal redundancy check 水平冗余校验longitudinal section 纵切面longitudinal stay 纵向拉线longitudinal stress 纵向应力longitudinal vibration 纵向振动longitudinal wave 纵波loom motor 织布机电动机loop 回线loop current 回路电流loop current equation 回路电两程loop gain 环路增益loop gain characteristic 环路增益特性loop galvanometer 回线检疗loop line 环形线路loop method 环形法loop network 环形网络loop oscillograph 回线示波器loop phase angle 环路相位角loop system 环形系统loop test 环线试验loop transfer function 环路传递函数loose contact 接触不良loose coupling 弱耦合loss 损失loss angle 损耗角loss angle measurement 损耗角测量loss angle measuring bridge 损耗角测量用电桥loss factor 损失率loss factor measurement 损耗系数测量loss free dielectric 无损耗电介质loss meter 损耗电度表loss of load 甩负荷loss of phase 断相loss of stability 失去稳定性loss resistence 损耗电阻lossfree condenser 无损失电容器lossfree line 无损耗线路lossless circuit 无损失电路loudspeaker 扬声器low capacity cable 小容量电缆low carbon steel 低碳钢low energy relay 低耗能继电器low enriched uranium 低浓铀low frequency 低频low frequency distortion 低频失真low frequency furnace 低频炉low frequency induction furnace 低频感应电炉low frequency transistor 低频晶体管low head hydroelectric power station 低水头发电厂low loss line 低损耗线路low noise lever transformer 低噪声变压器low oil content circuit breaker 少油断路器low pressure 低压low pressure mercury lamp 低压水银灯low speed 低速low tension 低压low tension arc 低压电弧low tension cable 低压电缆low tension circuit 低压电路low tension coil 低压线圈low tension side 低压侧low tension winding 低压绕组low voltage 低压low voltage circuit 低压电路low voltage installation 低压设备low voltage insulator 低压绝缘子low voltage line 低压线路low voltage network 低压配电网low voltage protection 低电压保护装置low voltage relay 低压继电器low voltage switch gear 低压开关low voltage system 低压系统low voltage transformer 低压变压器low voltage winding 低压绕组low water level 低水位lubricant 滑润剂lubrication 润滑lubricator 加油器lug 接线片lumen 流lumen hour 列∈摈lumen second 撩膑lumenmeter 疗lumens per watt 每瓦流luminaire 发光体luminaire efficiency 照莽率luminance 亮度luminescence 发光luminescent material 发光物质luminescent screen 荧光屏luminosity 光度luminous 发光的luminous body 发光体luminous ceiling 照渺棚luminous center 发光中心luminous efficiency 发光效率luminous emittance 发光度luminous exitance 发光度luminous flux 光通量luminous flux density 光通量密度luminous intensity 光度luminous paint 发光涂料luminous radiation 光辐射luminous ray 光线luminous source 光源luminous standard 标准测光器lumminaire efficiency 光源效率lump coal 块煤lumped capacity 集中电容lumped circuit 集中常数电路lumped constant 集中常数lumped inductance 集中电感lumped parameter system 集中参数系统lumped resistance 集中电阻lux 勒克司lux ampere characteristic 勒克司安培特性lux second 勒秒luxmeter 照度计m n contours m n 轨迹mach number 马赫数machine 机器machine elements 机械零件machine equation 计算机方程machine in explosion proof enclosure 防爆隔爆型电机machine instruction 计算机指令machine language 机械语言machine oil 机械油machine time 计算机时间machine variable 运算变数machine with inherent self excitation 内在自励磁电机machine with natural cooling 自然冷却电机machine word 机浦machine work 机械加工machining 机械加工maclaurin expansion 马克劳林展开macro instruction 宏指令macro molecule 高分子macroscopic 宏观的macroscopic cross section 宏观截面maesuring error 测量误差magma power generation 岩浆发电magnesium 镁magnesium ferrite 镁铁氧体magnet 磁铁magnet coil 电磁线圈magnet keeper 永久磁铁衔铁magnet pole 磁极magnet steel 磁钢magnet wire 线圈线magnet yoke 磁轭magnetic 磁的magnetic action 磁酌magnetic aftereffect 剩磁效应magnetic aging 磁老化magnetic alloy 磁性合金magnetic alternating induction 交变磁感应magnetic amplifier 磁放大器magnetic analyzer 磁分析器magnetic anisotropy 磁蛤异性magnetic annealing 磁场退火magnetic attraction 磁吸引magnetic axis 磁轴magnetic balance 磁秤magnetic bearing 磁方位magnetic blow out 磁吹magnetic blow out arrester 磁吹避雷器magnetic blow out circuit breaker 磁吹式断路器magnetic blowout coil 磁性灭弧线圈magnetic blowout fuse 磁吹式熔断器magnetic brake 电磁制动器magnetic characteristic 磁特性magnetic charge 磁荷magnetic chuck 电磁卡盘magnetic circuit 磁路magnetic clutch 电磁离合器magnetic compass 磁罗盘magnetic confinement of plasma 等离子体磁约束magnetic confining field 封闭磁场magnetic constant 磁性常数magnetic core 磁心magnetic core memory 磁芯存储器magnetic core storage 磁芯存储器magnetic coupling 磁耦合magnetic damping 磁阻尼magnetic declination 磁偏角magnetic deflection 磁致偏转magnetic detector 磁性检波器magnetic dip 磁倾角magnetic dipole 磁偶极子magnetic disc memory 磁盘存储器magnetic disk 磁盘magnetic dispersion losses 磁漏损耗magnetic displacement 磁位移magnetic domain 磁畴magnetic drive 磁力传动magnetic element 磁性元件magnetic energy 磁能magnetic erase head 去磁头magnetic exploration 磁性探矿magnetic fatigue 磁力疲劳magnetic field 磁场magnetic field energy 磁场能magnetic field intensity 磁场强度magnetic field potential 磁势magnetic field strength 磁场强度magnetic figure 磁力线图magnetic film 磁膜magnetic flaw tester 磁探伤仪magnetic fluid clutch 磁铃离合器magnetic flux 磁通magnetic flux density 磁通密度magnetic focusing 磁聚焦magnetic force 磁力magnetic full voltage starter 电磁全电压起动器magnetic head 磁头magnetic hysteresis 磁滞magnetic inclination 磁倾角magnetic indicator for lightning currents 闪电电僚性指示器magnetic induction 磁感应magnetic interrupter 磁力断续器magnetic keeper 永磁衔铁magnetic leakage 磁漏magnetic leakage factor 磁漏系数magnetic lens 磁透镜magnetic levitation 磁力悬浮magnetic line of force 磁力线magnetic link 闪电电僚性指示器magnetic loading 磁负载magnetic logical element 磁气逻辑元件magnetic loss 磁损耗magnetic map 地磁图magnetic material 磁性材料magnetic measurement 磁测定magnetic memory 磁存储器magnetic meridian 磁子午线magnetic modulator 磁灯器magnetic moment 磁矩magnetic needle 磁针magnetic ore separator 磁选机magnetic particle fluorescent test 磁粉检查法magnetic path 磁路magnetic permeability 磁导率magnetic pickup 变磁阻拾音器magnetic polarity 磁极性magnetic polarization 磁极化magnetic pole 磁极magnetic potential 磁势magnetic potential difference 磁势差magnetic property 磁性magnetic prospecting 磁性探矿magnetic recording 磁性记录magnetic recording head 录音磁头magnetic reproducing head 再生磁头magnetic repulsion 磁推斥magnetic resistance 磁阻magnetic resonance 磁谐振magnetic reversal 逆磁化magnetic rigidity 磁刚性magnetic saturation 磁饱和magnetic screen 磁屏蔽magnetic screening 磁屏蔽magnetic separator 磁选机magnetic shielding 磁屏蔽magnetic shunt 磁分路magnetic stabilization 磁稳定化magnetic starter 磁力起动器magnetic steel 磁性钢magnetic storage 磁存储器magnetic substance 磁性体magnetic susceptibility 磁化率magnetic suspension 磁悬浮magnetic tape 磁带magnetic tape memory 磁带存储器magnetic tape reader 磁带阅读器magnetic thin film storage 磁性薄膜存储器magnetic transducer 电磁式变换器magnetic video recording 磁性录象magnetic viscosity 磁粘滞性magnetic wedge 磁性楔magnetic well 磁阱magnetically hard material 硬磁材料magnetics 磁学magnetism 磁magnetite 磁铁矿。

1 The transistor is what started the evolution of the modern computer industry in motion.晶体管开启了现代电脑工业的革命2 The storage cell only requires one capacitor and one transistor, whereas a flip-flop connected in an array requires 6 transistors.存储单元仅需要一个电容和晶体管，并而不像触发器整列那样需要6个晶体管3 There has been a never ending series of new op amps released each year since then, and their performance and reliability has improved to the point where present day op amps can be used for analog applications by anybody.从此以后每年都有新系列的运放发布，他们的性能和可靠性得到了提升，如今任何人都能用运放来设计模拟电路。

4 This is capable of very high speed conversion and thus can accommodate high sampling rates, but in its basic form is very power hungry.它具有高速转换能力，从而能适应高速采样速率，但它的基本形式非常耗电。

5 During the “on” period , energy is being stored within the core material of the inductor in the form of flux.在”on”阶段，能量以涌浪形式存储在电感的核芯材料里面6 The design goal of frequency synthesizers is to replace multiple oscillators in a system, and hence reduce board space and cost.频率合成器的设计目标是取代系统中多个振荡器，从而减小板卡面积和成本。

——电材专业英语课文翻译Semiconductor Materials• 1.1 Energy Bands and Carrier Concentration• 1.1.1 Semiconductor Materials•Solid-state materials can be grouped into three classes—insulators(绝缘体）, semiconductors, and conductors. Figure 1-1 shows the electrical conductivities δ(and the corresponding resistivities ρ≡1/δ)associated with(相关）some important materials in each of three classes. Insulators such as fused（熔融）quartz and glass have very low conductivities, in the order of 1E-18 to 1E-8 S/cm;固态材料可分为三种：绝缘体、半导体和导体。

图1－1 给出了在三种材料中一些重要材料相关的电阻值（相应电导率ρ≡1/δ)。

绝缘体如熔融石英和玻璃具有很低电导率，在10-18 到10-8 S/cm;and conductors such as aluminum and silver have high conductivities, typically from 104 to 106 S/cm. Semiconductors have conductivities between those of insulators and those of conductors. The conductivity of a semiconductor is generally sensitive to temperature, illumination（照射）, magnetic field, and minute amount of impurity atoms. This sensitivity in conductivity makes the semiconductor one of the most important materials for electronic applications.导体如铝和银有高的电导率，典型值从104到106S/cm;而半导体具有的电导率介乎于两者之间。

电子信息工程专业英语教程第三版译者:唐亦林p32In 1945 H. W。

Bode presented a system for analyzing the stability of feedback systems by using graphical methods. Until this time, feedback analysis was done by multiplication and division，so calculation of transfer functions was a time consuming and laborious task. Remember, engineers did not have calculators or computers until the ’70s。

Bode presented a log technique that transformed the intensely mathematical process of calculating a feedback system’s stability into graphical analysis that was simple and perceptive. Feedback system design was still complicated, but it no longer was an art dominated by a few electrical engineers kept in a small dark room。

Any electrical engineer could use Bode's methods find the stability of a feedback circuit，so the application of feedback to machines began to grow。

电气工程词汇voltage电压diode二极管current电流potentiometer电位器resistance电阻step-uptransformer升压变压器reactance电抗powersystem电力系统,电网impedance阻抗transmissionline输电线conductance电导breaker断路器inductance电感relay继电器inductor电感器demodulator解调器capacitance电容radiator散热器capacitive电容性的，电容的ventilation通风，换气，通风装置shuntcapacitor并联电容器alternatingrelay交流继电器shunt并联integratedcircuitamplifier集成电路放大器series串联transistoramplifier晶体管放大器seriescircuit串联电路terminal端子parallelcircuit并联电路amplifier/magnifier放大器conductor导线cablen电缆v架设电缆voltmeter电压表fuse保险丝熔断器ammeter电流表interface接口arc电弧amplitude振幅幅度波幅chargen电荷v充电，带电，起电digitalsignal数字信号dischargev放电coupling耦合bridge电桥intermittent周期的valve电子管dislocation错位deenergize断路malfunction故障dielectric不导电的/绝缘的medium介质generator发电机screen屏蔽motor电动机dampen阻尼audion三极管socket插孔groundplane接地层alternatingcurrent交流电流three-phasen三相inverting反相potentialdifference电位差outofphase异相activeelement有源元件self-inductor自感idealindependentsource理想独立电源mutual-inductor互感watthourmeter感应线圈ampere安培frequencychanger变频器coulomb库仑controlswitch控制开关joule焦耳selectorswitch选择开关resistor电阻器currenttransformer电流互感器charger充电器powertransformer电力变压器semiconductor半导体phasevoltage相电压absolutevalue绝对值constantvoltagesource恒定电压源operatingsupplyvoltage电源工作电压专业词汇Isolator刀闸(隔离开关)定串联电容补偿Susceptance电纳voltagestability电压稳定regulator稳压器anglestability功角稳定admittance导纳installedcapacity装机容量rectifier整流器transformersubstation变电站busbar母线degreeofcompensation补偿度analogsignal模拟信号linedropcompensation（LDC）线路补偿asynchronism异步器synchronization同步circuittheorems电路定理armature电枢superpositiontheorem叠加定理attenuate衰减substitutiontheorem替代定理steam-turbine-drivengenerator气轮发thevenin-NortonTheorem戴维宁定理电机electromagnetism电磁;电磁学turbinegenerator涡轮发电机low-frequencyamplifier低频放大器magneticflux磁通量low-frequencybypass低频旁路oscilloscope示波器voltagedistortion交流电压校准器oscillator震荡器SingleChipMicroprocessor(SCM)单片机multimeter万用表alternatingcurrent(AC)交流/交流电overlay叠加效果adjustablepressureconveyor调压输送ratedpower额定功率机poweramplifier功率放大器allowableloadimpedance允许的负载阻activevoltage有效电压抗voltagetocurrentconverter电压电流closedloopcontrol闭环控制变换器closedloopvoltagegain闭环电压增益transformersubstation变电站closed-loopgain死循环增益regulation调节clutch离合器/联轴器degreeofcompensation补偿度commutator/rectifier整流器highvoltageshuntreactor高抗cutoffvoltage临界电压reactivepowercompensation无功补偿cut-involtage闭合电压three-columntransformer三绕组变压器dielectricadj.不导电的/绝缘的double-columntransformer双绕组变压器dielectricpuncture击穿power-factor功率因数electricaldurability电寿命（万次）voltagegrade电压等级electromagneticresonance电磁感应no-loadcurrent空载电流electromotiveforce电动力/电动势impedance阻抗positivecharge正电荷positivesequenceimpedance正序阻抗negativecharge负电荷negativesequenceimpedance负序阻抗AutomaticGenerationControl(AGC)自动zerosequenceimpedance零序阻抗发电控制susceptance电纳PowerSystemStabilizator(PSS)电力系stator定子统稳定器highvoltage高压polyphase多相(的) fixedseriescapacitorcompensation固iron-loss铁损armaturecircuit电枢电路interface接口dynamicresponse动态响应demodulator解调器timeinvariantadj.时不变的balanceindicator交流平衡指示器self-inductor自感currentcalibrator交流电流校准器mutual-inductor互感resistancebox交流电阻箱polarity极性voltagedistortion交流电压校准器ventilation通风，换气，通风装置standardresistor交流标准电阻器low-frequencybypass低频旁路directcurrent（DC）直流电powerpool联合电力系统；联合电网eddycurrent涡流electromagnetism电磁;电磁学corridor通路core/shellforme铁心式/壳式inducedcurrent感生电流potentialdifference电位差laminatedcore叠片铁芯dualin-linepackages双列直插式组件left-handrule左手定则automaticcontrolsystem自动控制系统volt-amperecharacteristics伏安特性torquemotor力矩电动机simulationanalysis仿真分析amplifierusingdiscrete分离元件放大onemachine-infinitybussystem单机器无穷大系统potentiometer电位器ElectricalMachinery电机学voltage-currentcharacteristic伏安特AutomaticControlTheory自动控制理论性ElectrotechnicsPrincipleofCircuits topology拓扑电工学termocouple热电偶ElectricalDriveandControl电力传动与exitation激发;激励;干扰控制air-gap气隙brownout节约用电polyphasen.多相adj.多相的cathode阴板、负极breakdowntorque失步转矩cationexchanger阳离子交换器locked-rotortorque止转转矩circuitbreaker电路断路器nominalfrequency额定频率circuitdiagram电路图subtransmission二次输电coaxialcable同轴电缆hydro-generation水力发电coolingtower冷却塔feeder馈线;馈电电路intermediaterelay中间继电器thermalunit热力机组jumper跳线、跨接activepowerbalance有功功率平衡lightningarrestor避雷器load-frequencycontrol（LFC）负荷频率installedcapacity装机容量控制instrumentpanel仪表盘sychronouscondenser同步调相机tap-changingtransformer可调分接头变压器tapcoil跳闸线圈magneticaircircuitbreaker磁吹断路器automaticgenerationcontrol（AGC）自动发电控制circuitboard电路板i nstantaneouspower瞬时功率lossofexcitation励磁损失manualreject手动切换overheadline架空线plantloadfactor电厂负荷因数potentialtransformer电压互感器overspeedtrip超速跳闸pyod热电偶safepotential安全电压shield屏蔽层WORD格式singlebladeswitch单刀开关starconnectedsystem星形连接制"Y"staticstorage静态存储器stationcapacity发电厂容量step-downtransformer降压变压器substation变电站、子站subtransmission二次输电thermalpowerplant热力发电厂thumbrule安培右手定则trip跳闸、断开starconnectedsystem星形连接制"Y"A/Cadaptor电源适配器analogtodigital模拟/数字转换acinducedpolarizationinstrument交流激电仪adjustablepressureconveyor调压输送机allowableloadimpedance允许的负载阻抗chargeneutrality电中性区ChargeTerminationVoltage允电端电压/允电端接电压circuitdiagram电路板circuitswitching电路交换closed-loopvoltagegain死循环电压增益connectors插接器constantvoltagemodulation稳压调节currentattenuation电流减衰装置CurrentbyPhase(AMP)每相电流currentlimitativerange电流限制范围cutoffvoltage临界电压cut-involtage闭合电压DischargeTerminationVoltage放电端电压dropoutvoltage跌落电压eddycurrent涡电流electormagneticbrakingsytem电磁制动系统electricdipole电偶极子electricshielding电屏蔽FrequencyHopping跳频input-outputcontrolsystem(IOCS)输入输出控制系统offsetvoltage失调电压。

Unit3 computer architecture and microprocessors3--1 Computer Architecture1) Computer architecture , in computer science , is a general term referring to the structure of all or part of computer system . The term also covers the design of system software , such as the operating system (the program that controls the computer) , as well as referring to the combination of hardware and basic software that links the machines on a computer network . Computer architecture refers to an entire structure and to the details needed to make it functional . Thus , computer architecture covers computer systems , microprocessors , circuits , and system programs . Typically the term does not refer to application programs , such as spreadsheets or word processing , which are required to perform a task but not to make the system run .2)1.Design Elements3) In designing a computer system , architects consider five major elements that make up the system's hardware : the arithmetic /logic unit , control unit , memory , input , and output . The arithmetic /logic unit performs arithmetic and compares numerical values . The control unit directs the operation of the computer by taking the user instructions andtransforming them into electrical signals that the computer 's circuitry can understand . The combination of the arithmetic /logic unit and the control unit is called the central processing unit (CPU) . The memory stores instructions and data . The input input and output sections allow the computer to receive and send data , respectively .4) Different hardware architectures are required because of the specialized needs of systems and users . One user may need a system to display graphics extremely fast , while another system may have to be optimized for searching a database or conserving battery power in a laptop computer .5) In addition to the hardware design , the architects must consider what software programs will operate the system . Software , such as programming languages and operating systems , makes the details of the hardware architecture invisible to the user . For example , computers that use the C programming language or a UNIT operating system may appear the same from the user's viewpoint , although they use different hardware architectures .6)2.Processing Architecture7) When a computer carries out an instruction , it proceeds through five steps . First ,the control unit retrieves theinstruction from memory , for example , an instruction to add two numbers . Second , the control unit decodes the instruction into electronic signals that control the computer . Third , the control unit fetches the data (the two numbers) . Fourth , the arithmetic/logic unit performs the specific operation ( the addition of the two numbers ) . Fifth , the control unit saves the result ( the sum of the two numbers ) .8) Early computers used only simple instructions because the cost of electronic capable of carrying out complex instructions was high . As this cost decreased in the 1960s , more complicated instructions became possible . Complex instructions ( single instructions that specify multiple operations ) can save time because they make it unnecessary for the computer to retrieve additional instructions . For example , if seven operations are combined in one instruction , then six of the steps that fetch instructions are eliminated and the computer spends less time processing that operation . Computers that combine several instructions into a single operation are called complex instruction set computers ( CISC ) .9) However , most programs do not often use complexinstructions , but consist mostly of simple instructions . When these simple instructions are run on CISC architectures , they slow down processing because each instruction--whether simple or complex --takes longer to decode in a CISC design . An alternative strategy is to return to designs that use only simple , single--operation instruction sets and make the most frequently used operations faster in order to increase overall performance . Computers that follow this design are called reduced instruction set computers ( RISC ) .10) RISC designs are especially fast at the numerical computations required in science , graphics , and engineering applications . CISC designs are commonly used for non-numerical computations because they provide special instruction sets for handling character data , such as text in a word processing program . Specialized CISC architectures , called digital signal processors , exist to accelerate processing of digitized audio and video signals .11)3.Open and Closed Architectures12) The CPU of a computer is connected to memory and to the outside world by means of either an open or a closed architecture . An open architecture can be expanded after the system has been built , usually by adding extra circuitry ,such as a new microprocessor computer chip connected to the main system . The specifications of the circuitry are made public , allowing other companies to manufacture these expansion products .13) Closed architectures are usually employed in specialized computers that will not require expansion , for example , computers that control microwave ovens . Some computer manufacturers have used closed architectures so that their customers can purchase expansion circuitry only from them . This allows the manufacture to charge more and reduces the options for the consumer .14)work Architecture15) Computers communicate with other computers via networks . The simplest network is a direct connection between two computers . However , computers can also be connected over large networks , allowing users to exchange data , communicate via electronic mail , and share resources such as printers .16) Computers can be connected in several ways . In a ring configuration , data are transmitted along the ring and each computer in the ring examines this data to determine if it is the intended recipient . If the data are not intended fora particular computer , the computer passes the data to the next computer in the ring . This process is repeated until the data arrive at their intended destination . A ring network allows multiple messages to be carried simultaneously , but since each message is checked by each computer , data transmission is slowed .17) In a bus configuration , computers are connected througha single set of wires , called a bus . One computer sends data to another by broadcasting the address of the receive and the data over the bus . All the computers in the network look at the address simultaneously , and the intended recipient accepts the data . A bus network , unlike a ring network , allows data to be sent directly from one computer to another . However , only one computer at a time can transmit data . The others must wait to send their messages .18) In a star configuration , computers are linked to a central computer called a hub . A computer sends the address of the receiver and the data to the hub , which then links the sending and receiving computers directly . A star network allows multiple messages to be sent simultaneously , but it is more costly because it uses an additional computer , the hub , to direct the data .19)5.Recent Advances20) One problem in computer architecture is caused by the difference between the speed of the CPU and the speed at which memory supplies instructions and data . Modern CPUs can process instructions in 3 nanoseconds ( 3 billionths of a second ) . A typical memory access , however , takes 100 nanoseconds and each instruction may require multiple accesses . To compensate for this disparity , new computer chips have been designed that contain small memories , called caches , located near the CPU . Because of their proximity to the CPU and their small size , caches can supply instructions and data faster than normal memory . Cache memory stores the most frequently used instructions and data and can greatly increase efficiency .21) Although a large cache memory can hold more data , it also becomes slower .To compensate , computer architects employ designs with multiple caches . The design places the smallest and fastest cache nearest the CPU and locates a second large and slower cache farther away . This arrangement allows the CPU to operate on the most frequently accessed instructions and data at top speed and to slow down only slightly when accessing the secondary cache . Using separatecaches for instructions and data also allows the CPU to retrieve an instruction and data simultaneously .22) Anther strategy to increase speed and efficiency is the use of multiple arithmetic/logic units for simultaneous operations , called super scalar execution . In this design , instructions are acquired in groups . The control unit examines each group to see if it contains instructions that can be performed together . Some designs execute as many as six operations simultaneously . It is rare , however , to have this many instructions run together ,so on average the CPU does not achieve a six-fold increase in performance . 23) Multiple computers are sometimes combined into single systems called parallel processors . When a machine has more than one thousand arithmetic/logic units , it is said to be massively parallel . Such machines are used primarily for numerically intensive scientific and engineering computation .Parallel machines containing as many as sixteen thousand computers have been constructed .3-3 VLIW Microprocessors24) When Transmeta Corp. revealed its new Crusoe of processors last month ,experts weren’t surprised to learn that the chips are based on Very Long Instruction Word(VLIW)technology .VLIW has become the prevailing philosophy of microprocessor design , eclipsing older approaches such as RISC and complex instruction set computing(CISC) .25) All microprocessor designs seek better performance within the limitations of their contemporary technology. In the 70s of 20th century ,for example ,memory was measured in kilobytes and very expensive .CISC was the dominant approach because it conserved memory .26) In the CISC architecture . there can be hundreds of program instructions-simple commands that tell the system to add numbers, store values and display results. If all instructions were the same length , the simple ones would waste memory .Simple instructions require as little as 8 bits of storage space , while the most complex consume 120 bits .27) Variable-length instructions are more difficult for a chip to process, though, and the longer CISC instructions are especially complex. nonetheless ,to maintain software compatibility, modern chips such as Intel’s Pentium III and Advanced Micro Devices Inc.’s Athlon must still work with all troublesome CISC instructions that were designed in the 1980s , even though their original advantage-memory conservation-isn’t as important .28) In the 1980s , RAM chips got bigger and bigger in capacity while their prices dropped . The emphasis in CPU design shifted to relatively simple , fixed-length instructions , always 32 bits long .Although this wastes some memory by making programs bigger ,the instructions are easier and faster to execute .29) The simplicity of RISC also makes it easier to design superscalar processors-chips that can execute more than one instruction at a time .This is called instruction-level parallelism. Almost all modern RISC and CISC processors are superscalar. But achieving this capability introduced significant new levels of design complexity.30) VLIW chips can cost less , burn less power and achieve significantly higher performance than comparable RISC and CISC chips But there are always trade-offs. One is code expansion-programs grow larger , requiring more memory. Far more important , though , is that compilers must get smarter .A poor VLIW complier will have a much greater negative impact on performance than would a poor RISC or CISC compiler .31) VLIW isn’t a magic bullet , but it’s the new wave in microprocessor design .Within a few years , it’s certain that at least some of your software will be running on VLIW chips .单元3 电脑体系和微处理器3-1 电脑体系电脑体系，在电脑科技中，是一个依据整个或部分电脑结构的通用术语，这个术语也包含软件系统的设计，例如这个操作系统（控制电脑的程序），以及依据这个在电脑网络中连接主机的硬件和基本的软件的结合体。

1. Electrical Measuring Instruments电子测量仪表Electrical personnel use many different types of measuring instruments. 电子技术人员使用许多不同类型的测量仪器。

Some jobs require very accurate measurements while other jobs need only rough estimates. 一些工作需要精确测量面另一些工作只需粗略估计。

Some instruments are used solely to determine whether or not a circuit is complete. 有些仪器被使用仅仅是确定线路是否完整。

The most common measuring and testing instruments are voltage testers, voltmeters, ammeters, ohmmeters, continuity testers, megohmmeters, wattmeters（功率计）, and watt-hour meters（电度表，电表）。

最常用的测量测试仪表有：电压测试仪，电压表，欧姆表，连续性测试仪，兆欧表，瓦特表还有瓦特小时表。

All meters used for measuring electrical values are basically current meters. 所有测量电值的表基本上都是电流表。

They measure or compare the values of current flowing through them. 他们测量或是比较通过他们的电流值。

The meters are calibrated and the scale is designed to read the value of the desired unit. 这些仪表可以被校准并且设计了不同的量程，以便读出期望的数值。

Unit 4 通信和信息论Unit 4-1第一部分：远程通信远程通信是远距离通信的信号传输，在现代，通常这个过程需要电子发射机发射电磁波，但是在早期远程通信包括使用烟火信号，鼓或旗语或日光仪。

今天，远程通信很普遍的，助推这一过程的设备如电视，无线电和电话在世界的许多地区都已很普遍。

还有连接这些设备的许多网络，包括计算机网络，公共电话网，无线电网和电视网络。

互联网上的计算机通信是众多通信的一个例子。

通信系统通常由通信工程师设计。

在这个领域中早期的发明家有Alexander Graham Bell, Guglielmo Marconi 和John Logie Baird。

通信在当今的世界经济发展中起着举足轻重的作用，通信产业的税收在世界总产值的比例已接近百分之三。

基本要素每个通信系统包括三个基本要素：采集信息并能将其转换为信号的发射机，传输信号的传输媒介，接收信号并能将其还原为有用信息的接收机。

考虑一个无线电广播的例子。

广播塔是发射机，收音机是接收机，传输媒介是自由空间。

通常通信系统都是双向的，一个设备既做发射机又做接收机，即收发器。

例如，移动手机就是一个收发器。

电话线上的通信称为点对点通信，因为只在一个发射机和一个接收机之间。

通过无线电广播的通信称为广播（一对多）通信，因为通信是在一个大功率的发射机和许多接收机之间。

模拟或数字信号可以是模拟的，也可以是数字的。

在模拟信号中，信号根据信息而连续变化。

在数字信号信息被编码为一组离散值（如，1和0）。

在传输过程中，模拟信号中的信息会因噪声而退化。

相反，只要噪声不超过一定的阈值，数字信号中的信息是不会丢失的。

这是数字信号相对于模拟信号一个关键的优点。

网络网络是由一个相互通信的发射机、接收机或收发机的集合。

数字网络由一个或多个路由器组成，路由器正确地将数据发送给用户。

模拟网路由一个或多个交换器组成，交换器在两个或多个用户间建立连接。

这两种网络都需要中继器，用于远距离传输时的放大或重建信号。

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Practical Applications of Semiconductor Reliability ModelingLori E. Bechtold, Boeing Commercial AirplanesFlorian Molière, PhD, Airbus Group InnovationsDavid A. Sunderland, PhD, Boeing Space & Intelligence SystemsBahig Tawfellos, Honeywell AerospaceKey Words: Physics-of-Failure, Predictions, Semiconductor ReliabilitySUMMARY & CO CLUSIO SA practical methodology for modeling the reliability of deep submicron (<90 nm) semiconductor microcircuits provides timely and needed information for the integration of commercial off the shelf (COTS) electronics in airborne and high reliability applications.（1）Designing and assuring customer confidence in airborne high reliability applications becomes more challenging as electronics technologies develop rapidly and commercial application demands drive the increasing use of faster, more integrated, higher density commercial off the shelf (COTS) electronics. （2）Use of COTS electronics provides advantages of greater computational power, with higher manufacturing volumes driving better quality control. COTS also introduce the new problem of life-limited semiconductors [1]. Outdated adequately support reliable aerospace system design [2].The Semiconductor Reliability project, that launched in April 2013 by the Aerospace Vehicle Systems Institute (A VSI) under the Authority for Expenditure (AFE) 83, （3）developed a practical approach to modeling the random and wearout failure mechanisms of deep sub-micron (<90nm) microcircuits. Unlike prior physics of failure approaches, the methodology was kept simple and was implemented in a spreadsheet. （4）This spreadsheet is provided free of charge to R&M practitioners to help promote understanding and common usage of the methodology. （5）Recipients of the spreadsheet are expected to provide feedback to the A VSI team in return. The project also encourages microcircuit device suppliers to provide reliability information in some form, （6）either by using the spreadsheet or directly providing the cumulative defect fraction (CDF) of their product in theapplication environments.When microcircuit device suppliers provide test data results for their products, the spreadsheet is used to scale the results from test to usage environments.（7）The methodology developed by A VSI differs from traditional Arrhenius methods in that scaling is not only based on temperature but also on voltage, current and frequency. （8）Models of time dependent dielectric breakdown (TDDB), hot carrier injection (HCI), negative bias temperature instability (NBTI) and electromigration (EM) are used to gain an accurate reliability assessment for technologies sensitive to these mechanisms.（9）This paper describes the A VSI reliability research project,the semiconductor microcircuit reliability models, andcommercial and provides examples of the application of these models to support reliable avionics systems design.I TRODUCTIO（10）COTS microcircuit wearout has become a major concern for both military/aerospace (mil/aero) integrators and avionics equipment manufacturer companies (OEMs) . （11）By contrast with packaging reliability issues, microcircuit wearoutelectronics degradations cannot be easily addressed and revealed by means of the typical qualification tests performed on equipment. （12）This is because equipment qualification tests mainly accelerate environmental tresses (thermal cycle vibration, moisture) without the necessary functional constraints required to bring to light the life limited semiconductor issues. In this sense, wearout concerns have to be addressed in an early design phase at the sub-assembly level (Figure 1) through component selection methodologies like the one proposed in this paper.（13）Designing for high reliability applications is a challenge that requires multi-level collaboration to assure vertical integration of the requirements and information flow necessary for design. （14）Figure 2 illustrates the flow of information between members of the supply chain, showing generally the downward flow of requirements and upward flow of analysis and test data needed to design systems to meet the requirements.（15）Mil/aero integrators design aircraft and other platforms for commercial and military applications. （16）All companies in this market segment face the common need to use the best available COTS electronics in high reliability applications. （17）Airborne high reliability mil/aero applications generally experience greater environmental stresses than ground based commercial applications. （18）They drive reliability requirements in the context of thermal profiles, thermal cycling and vibration environments down to their suppliers, the avionics OEMs.（19）Avionics OEMs must find architecture solutions and trade multiple and often conflicting requirements.The avionics OEMs procure electronics devices from the microcircuit device suppliers and must understand how the device will operate in the required environments. （20）Mitigation measures at the avionics OEM level include adequately derating the device in the context of thermal profiles, thermal cycling, vibration, voltage and frequency, and assuring adequate architecture redundancy to guarantee reliability and safety requirements are met throughout the unit life.The microcircuit device suppliers must provide avionics OEMs with enough information and substantiating data so the OEM can make good design decisions while using their devices in electronics modules. The avionics OEM must provide the mil/aero integrators with enough information and substantiating data for them to use the modules in an airborne platform that meets their customer requirements for high functionality, safety and reliability over the operational lifetimes of the equipment.（21）The AFE 83 project aims to break down communication barriers betweenthese market segments to improve practical semiconductor reliability assessments. （22）AFE 83 is working in collaboration with 与...合作microcircuit device suppliers to develop a practicable methodology for predicting the reliability of integrated circuit semiconductors for high reliability applications. It is developing a simple reliability prediction methodology for random failure rate and the time to intrinsic.（23）The random failure rate portion of the model is similar to MIL-HDBK-217 models [3], because it is scaled with device complexity复杂性and use conditions. （24）The physics of failure semiconductor wearout models developed in prior A VSI projects [4] are used as a starting point and will be modified based on the inputs from semiconductor suppliers.2 A VSIA VSI is a research cooperative that addresses issues impacting the aerospace community through international collaborative research conducted by industry, government and academia.（25）（翻译）Members combine their resources and talents to organize and conduct research projects directly benefiting the member organizations and often benefiting the aerospace industry as a whole.（26）A VSI provides a voice for their membership to jointly influence standards, processes and technologies related to aerospace industry.A VSI has invested over a decade of research into electronics reliability, including deep sub-micron (<130nm) semiconductor wearout mechanisms, atmospheric radiation effects and the integration of physics of failure methods into reliability predictions. In 2010, A VSI reliability roadmap project, AFE 74, engaged a broad community of reliability subject matter experts to develop a consensus based Reliability Prediction Technology Roadmap. The Roadmap identified many gaps in reliability prediction capability to support the application needs identified by the stakeholders.（27）The stakeholders require a methodology that results in timely,accurate and necessary information to support design engineering processes that build customer confidence in product reliability. Semiconductor reliability modeling was identified as a high priority by the roadmap project[5].3 APPLICATIO SAerospace applications often require a 20-30 year service life, while COTS electronics usually are designed for shorter market cycles. while COTS electronics usually are designed for high performance and low cost, consequently long termreliability is less of a concern. This leaves less incentive for COTS suppliers to address the need for extended life by applying mitigation measures for these failure mechanisms. If “design for reliability”measures have been applied within the microcircuit, these may be proprietary or not fully understood by the user, so will not figure in the user’s reliability modeling. By focusing at the part level, the AFE 83 spreadsheet allows these mitigation measures to be included by the supplierAvionics systems are designed to rigorous high standards of safety and reliability, with growing processing demands of advanced navigation, guidance and communication systems. High functional density and high speed processing to support the growing avionics systems requirements is enabled through the use of COTS electronics with deep sub-micron (<90 nm) integrated circuit (IC) technologies.Airborne environments are generally harsher than ground based applications. Each flight cycle induces vibration combined with a thermal cycle in many electronics, especially those in partially protected areas such as the electronics bay.（28）Flight environments are harsh on electronics and electronic packaging, due to extremes of temperature, frequent thermal cycling, moisture, vibration, pressure, and atmospheric radiation. （29）In aviation applications, reliability needs can be higher as application conditions become worse.The effect of temperature on reliability may be seen in Fig.3. （30）This chart, provided by Xilinx, is an example of one type of result that could come out of the spreadsheet. Here Xilinx has used an internal tool, described in [6], to compute time to an acceptable percent failure for each of three distinct intrinsic wearout failure mechanisms, as well as the net lifetime value considering all three. They then plotted the result versus use temperature.（31）（翻译）.The AFE 83 spreadsheet similarly can provide the user with calculations of reliability at multiple temperatures, which can be convolved with the application’s temperature vs. time profile (e.g., Fig. 4 for commercial avionics) to enable mission analysis or decisions on whether to provide a more protected environment for the electronics. [7]（32）The results of such reliability calculations are intended to provide reasonable inputs to estimates of system-level reliability. （33）Aggregated, part-level reliability parametric data can be used to compute a reliability estimate at the circuit board, line replaceable unit, or subsystem level. This is based on the system designer’s understanding of the intended operation of the system and the environment in which it is intended to operate.While the proposed methodology is more involved than traditional reliability estimation methods, it may not be necessary to analyze every device in a given unit. （34）For many,conservative estimates will be adequate to meet random failure rate targets, and combination of older technology and limited stress will suggest that wearout life is adequate. The practical understanding of the inner relationship between the effects of the wearout failure mechanisms within a part may be controversial. The source of controversy is whether such effects can be treated as competing effects or if it is more accurate to model them as enhancing each other. （35）Asimplifying assumption in the spreadsheet is that the mechanisms are independent, and that the cumulative failure fractions may be combined numerically without correcting for an interaction between them.Figure 5 shows a sample flow diagram of the decision process an equipment manufacturer may use to determine the application of these analyses or equivalent. （36）It is important to note that if a component is expected to experience early wearout it must have the dominant wearout mechanisms accounted for in a prediction or the results will be misleading.（37）Figure 6 shows another approach to system level analysis where the traditional random failure reliability prediction (Mean Time Between Failures) is normalized to a Mean Life,so that it can be compared with the Geometric Mean Life the wearout of each small geometry part over the usage profile.[8] The Avionics OEM can then understand whether the small geometry part will be a key driver in their ability to meet the MTBF requirement.EM, TDDB, HCI and NBTI have been identified as dominant failure mechanisms for complementary metal-oxide semiconductors (CMOS) [9]. Models for these mechanisms were developed by various researchers and studied during the A VSI projects AFE 17, 71 and 71s1 and validated [10]. They have also been presented in detail in a previous RAMS paper [11], and are summarized here.The AFE 83 spreadsheet offers models for all four mechanisms, based on equations (1)-(4).T2 is the test temperature in K.These equations differ in some ways from traditional forms [12] to make the independent variables those directly controllable by the IC user, (e.g. for EM we use voltage as a proxy for current density.) （38）In addition, alternate forms of voltage acceleration models are provided in the spreadsheet,for different technologies.The failure mechanism AF models for TDDB, EM, HCI and NBTI provide an assessment at the feature level within the logic circuitry of an IC. The effects of these mechanisms become more pronounced as feature sizes shrink and functional density increases. （39）A recent study of field failures of communications technology semiconductors found that failures due to these effects are increasing, in a way similar to Moore’s Law [13] [14]. （40）Models have been developed for NBTI; however as semiconductor feature sizes continue to reduce Positive Bias Temperature Instability (PBTI) may become an issue and models will need to be developed.A traditional approach is to use the Arrhenius model to scale test data to usageenvironments using empirically derived activation energy factors. （41）It does not consider the relying on a generalized temperaturewere developed by various researchers and studied during the related failure rate model. [15] The models provided in the spreadsheet offer a more detailed failure characterization, the ability to consider multiple failure mechanisms and to directly model voltage and frequency effects as well as thermal effects.5 RELIABILITY PREDICTIO OF SEMICO DUCTORSIn any practical reliability analysis the best data available is used, and this is also true for use of the AFE 83 spreadsheet.Due to budget and time constraints and possibly the limited availability of COTS vendor data, analyses are sometimes performed with less than ideal data precision. The ideal strategy is to seek the best data first then fall back on other sources. The following is the prioritized order for finding data and analyzing semiconductor microcircuits:1. Ideal–Supplier provides all the necessary reliability in the usage environments and considering operational stresses2. Second best –Supplier provides some test information, and the user adjusts it to usage conditions using AFE 83 spreadsheet3. Third best –If no test data is available, the user runsIn (1)-(4), their own set of tests and uses AFE 83 spreadsheet to are the acceleration perform prediction4.Fourth option –When no information is available, a factors for T DDB, EM, HCI and NBTI, respectively, prediction can be performed using AFE 83 spreadsheet defaults .The AFE 83 spreadsheet PoF models are used to start the conversation with semiconductor supplier companies about what is needed for the analysis. A potential approach is to have semiconductor manufacturers take the spreadsheet develop it to accurately model their particular product line, and provide it on a webpage for use by reliability engineers applying their product in an electronic system.The prototype spreadsheet has assumed numerical values in places where the device-specific parameters are unknown.The spreadsheet is a starting point and not the final solution is used as a basis for how semiconductors are modeled.Participants and partners in this project will need to describe the methodology for estimating reliability with key objectives of identifying the data needed from device manufacturers and thatdefining the method for integrating the data into a usable result. This is accomplished through guidelines which are to be published as a deliverable of AFE83.The AFE 83 spreadsheet includes a wearout prediction model and assessment based on the four mechanisms from AFE 71s1. An initial slope factor 2 provides an example of how a Weibull analysis may characterize wearout. Although initial parametric model input values are offered in the spreadsheet, the actual parameters of the model will be provided by semiconductor suppliers, or used by them to perform wearout reliability assessment for their customers.一语言点（1）designing 和assuring 都是动词的ing形式作形容词来修饰customer。

电气和电子技术的一些专业术语。

词汇一般都很简单，但多是引申义。

故翻译的时候有讲究。

比如Bus，普通的翻译就是公共客车或巴士，如Airbus，空客。

但在电子领域如将Adress Bus，Data Bus和Control Bus翻译成“地址客车”、“数据客车”、“控制客车”就要闹笑话了。

正确的翻译应该是“地址总线”、“数据总线”和“控制总线”。

下面是平时积累的专业术语，觉得有必要整理一下。

不断更新中……AAC Alternating Current 交流电AD Analog to digital 模拟到数字转换Amplifier 放大器Analog 模拟ARM Advanced RISC Machine 先进简单指令集机器Assembler 汇编程序BBase （三极管的）基极、基区Bandwidth 带宽Bias 偏置Binary 二进制BIOS Basic Input/Output System 基本输入输出系统Bus 总线CCAD Computer Aided Design 计算机辅助设计Capacitance 电容CCD Charge Coupled Device 电荷耦合器件Channel Length Modulation （场效应管的）沟道长度调制效应Circuit 电路CISC Complex Instruction Set Computer复杂指令集计算机CMOS Complementary Metal Oxide Semiconductor 互补金属氧化物半导体Compute 计算Conductor 导体Conductance 电导CPU Center Process Unit 中央处理器Current 电流DDA Digital to Analog 数模转换DC Direct Current直流电Device 器件Diode 二极管DRAM Dynamic Scanning RAM 动态扫描只读存储器Drive/Driver 驱动/驱动程序DSP Digital Signal Process/Processor 数字信号处理/处理器EEDA Electronic Design Automation 电子设计自动化EEPROM Electric Erasable Programmable ROM 电可擦写可编程ROMElectric 电气（名词）Electrical 电气的Electron 电子Electronic 电子的EPROM Erasable Programmable ROM 可擦写可编程ROMFFET Field Effect Transistor 场效应晶体管FFT Fast Fourier Transform 快速傅里叶变换Flash 闪存FPGA Field Programmable Gate Array 现场可编程逻辑阵列Frequency 频率GGain 增益HHardware 硬件HDL Hardware Description Language硬件描述语言HD Hard Disc硬盘High Definition 高清晰、高分辨率II2C（读作I方C）Inter Intergrated Circuit 内部集成电路IC Intergrated Circuit 集成电路IEEE Institute of Electrical and Electronic Engineers（美国）电气和电子工程师联合会Impedance 阻抗Instruction 指令I/O Input/Output 输入输出IP Internet Protocol 因特网协议或Intellectual Property知识产权JKKCL Kirchhoff's Current Theorem基尔霍夫电流定理KVL Kirchhoff's Voltage Theorem基尔霍夫电压定理LLAN Local Area Network局域网Logic 逻辑MMCU Micro Control Unit微控制器（单片机）MPU Micro Process Unit微处理器NOOPAMP Operational Amplifier运算放大器PParallel 并行PC Personal Computer个人计算机Program Counter程序计数器PLA Programmable Logic Array可编程逻辑阵列PLD Programmable Logic Device可编程逻辑器件Port 端口QRRAM Radom Access Memory随机存储器Register 注册表，寄存器Resistor 电阻器Resistance 电阻RISC Reduced Instruction Set Computer精简指令集计算机ROM Read Only Memory只读存储器SSemiconductor 半导体Serial 串行Server 服务器Source 电源，场效应管的源极Substrate 衬底TTransistor 晶体管Transconductance 跨导Triode 三极管UVVLSI Very Large Scale IC 超大规模集成电路VHDL Very High Speed Circuit HDL超高速电路描述语言WXYZ。