《专业英语》课件(2)-The Operational Amplifier

Operational Amplifier
Telescopic cascode op amps design example (1)
Specifications: VDD=3V Differential output swing = 3 V Power dissipation = 10 mW Voltage gain = 2000 Other parameters (effective channel length=0.5 m): nCox =60A/V2 pCox =30A/V2 n=0.1V-1 p=0.2V-1 Voltage gain=2000 =0 VTHN=|VTHP|=0.7V
Operational Amplifier
Performance Parameters-gain (2)
Solution:
Av, no minal 1/ ( R1 R2 ) / R2 10
Av , closed A1 1 1 (1 ) {onlyif A1 1} 1 A1 A1
Performance Parameters-small-signal bandwidth (4)
For a step input Vin=au(t):
Vout (t ) a 1

t [1 exp( )]u (t )

When t, the final output value:
VF a 1
Since M1~M4 are in signal path, keep sizes unchanged first, therefore double the length of M5~M8 while keep their W/L unchanged: (W/L)1-4=1250 (Leff=0.5 m) (W/L)5-8=1111 (Leff=1.0m) (W/L)9=400 The gain can be re-calculated as,

ernal force 外力 vector n. 向量, 矢量 the vector sum object n.物体,物品,实物;对象 opposite adj.相反的,相对的, 对面的,对立的 friction n. 摩擦, 摩擦力 friction factor 摩擦系数 torque n. 扭矩, 转矩 torque force 扭力 torque moment 转（扭）矩 moment n. 矩，动量 magnetic moment 磁矩 moment of inertia n.惯性(力)矩, 转动惯量 moment about point M 对M的矩 equivalent adj.相等的,相当的n.等价物,相等物 twisting n.扭曲 rotate v.(使)旋转 pivot n. 枢轴, 支点 product n.乘积
①A typical DC generator or motor usually consists of an armature core, an air gap, poles, and a yoke which form the magnetic circuit; an armature winding, a field winding, brushes and a commutator which form the electric circuit; and a frame, end bells, bearings, brush supports and a shaft which provide the mechanical support.
二极管是一种基本的电子元件。它限制电流在一个方向上 流动的能力是实际上每个电子电路生产中所依赖的关键性 质，从最小的电源到最大的工业过程控制器。

2. 同相比例器 i- _ i+ + R1
∞
+ + uo
Ri + ui _
u+ u-
u += u - = u i i += i - = 0
R2
_
(uo-u-)/R1= u-/R2 uo =(R1 + R2)/R2 ui =(1+ R1/R2) ui
3. 加法器（adder） 加法器（ ） Rf R1 ui1 iR2 _ ui2 ∞ uR3 + ui3 u+ +
∴ uo = −
f
1.规则： 规则： 规则
R1
ui
(1) 反相输入端和同相输入端的输入电流均为零。（虚断路） 反相输入端和同相输入端的输入电流均为零 端和同相输入端的输入电流均为零。 虚断路） (2) 对于公共端，反相输入端的电压与同相输入端的电压相等。 对于公共端，反相输入端的电压与同相输入端的电压相等 输入端的电压与同相输入端的电压相等。 虚短路） （虚短路）
CIRCUIT
input
input
Middle Part Amplify Voltage
output
Output
Feed back symbol ： 8 footer 2：inverting input 3：noninverting input ： 4、7：source 、 ： 6：output ： 1、5：for adjustment 、 ： 8：null ： 2 7
5. Circuit Model（电路模型） （电路模型） uRin u+
Ro + A(u+-u-) _
Rin ：Input resister Ro：Output resister

《自动化专业英语教程》-王宏文主编-全文翻译PART 1Electrical and Electronic Engineering BasicsUNIT 1A Electrical Networks ————————————3B Three-phase CircuitsUNIT 2A The Operational Amplifier ———————————5B TransistorsUNIT 3A Logical Variables and Flip-flop ——————————8B Binary Number SystemUNIT 4A Power Semiconductor Devices ——————————11B Power Electronic ConvertersUNIT 5A Types of DC Motors —————————————15B Closed-loop Control of DC DriversUNIT 6A AC Machines ———————————————19B Induction Motor DriveUNIT 7A Electric Power System ————————————22B Power System AutomationPART 2Control TheoryUNIT 1A The World of Control ————————————27B The Transfer Function and the Laplace Transformation —————29 UNIT 2A Stability and the Time Response —————————30B Steady State—————————————————31 UNIT 3A The Root Locus —————————————32B The Frequency Response Methods: Nyquist Diagrams —————33 UNIT 4A The Frequency Response Methods: Bode Piots —————34B Nonlinear Control System 37UNIT 5 A Introduction to Modern Control Theory 38B State Equations 40UNIT 6 A Controllability, Observability, and StabilityB Optimum Control SystemsUNIT 7 A Conventional and Intelligent ControlB Artificial Neural NetworkPART 3 Computer Control TechnologyUNIT 1 A Computer Structure and Function 42B Fundamentals of Computer and Networks 43UNIT 2 A Interfaces to External Signals and Devices 44B The Applications of Computers 46UNIT 3 A PLC OverviewB PACs for Industrial Control, the Future of ControlUNIT 4 A Fundamentals of Single-chip Microcomputer 49B Understanding DSP and Its UsesUNIT 5 A A First Look at Embedded SystemsB Embedded Systems DesignPART 4 Process ControlUNIT 1 A A Process Control System 50B Fundamentals of Process Control 52UNIT 2 A Sensors and Transmitters 53B Final Control Elements and ControllersUNIT 3 A P Controllers and PI ControllersB PID Controllers and Other ControllersUNIT 4 A Indicating InstrumentsB Control PanelsPART 5 Control Based on Network and InformationUNIT 1 A Automation Networking Application AreasB Evolution of Control System ArchitectureUNIT 2 A Fundamental Issues in Networked Control SystemsB Stability of NCSs with Network-induced DelayUNIT 3 A Fundamentals of the Database SystemB Virtual Manufacturing—A Growing Trend in AutomationUNIT 4 A Concepts of Computer Integrated ManufacturingB Enterprise Resources Planning and BeyondPART 6 Synthetic Applications of Automatic TechnologyUNIT 1 A Recent Advances and Future Trends in Electrical Machine DriversB System Evolution in Intelligent BuildingsUNIT 2 A Industrial RobotB A General Introduction to Pattern RecognitionUNIT 3 A Renewable EnergyB Electric VehiclesUNIT 1A 电路电路或电网络由以某种方式连接的电阻器、电感器和电容器等元件组成。