Analog filter

Single-Axis, High-g , i MEMS ® AccelerometersADXL193Rev. AInformation furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners.One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 Fax: 781.461.3113 ©2005 Analog Devices, Inc. All rights reserved.FEATURESComplete acceleration measurement system on a single monolithic ICAvailable in ±120 g or ±250 g output full-scale ranges Full differential sensor and circuitry for high resistance to EMI/RFIEnvironmentally robust packagingComplete mechanical and electrical self-test on digital commandOutput ratiometric to supplySensitive axes in the plane of the chip High linearity (0.2% of full scale) Frequency response down to dc Low noiseLow power consumption (1.5 mA)Tight sensitivity tolerance and 0 g offset capability Largest available prefilter clipping headroom 400 Hz, 2-pole Bessel filter Single-supply operationCompatible with Sn/Pb and Pb-free solder processesAPPLICATIONSVibration monitoring and control Vehicle collision sensing Shock detectionGENERAL DESCRIPTIONThe ADXL193 is a low power, complete single-axisaccelerometer with signal conditioned voltage outputs that are all on a single monolithic IC. This product measures acceleration with a full-scale range of ±120 g or ±250 g (minimum). It can also measure both dynamic acceleration (vibration) and static acceleration (gravity).The ADXL193 is a fourth-generation surface micromachined i MEMS® accelerometer from ADI with enhanced performance and lower cost. Designed for use in front and side impact airbag applications, this product also provides a complete cost-effective solution useful for a wide variety of other applications. The ADXL193 is temperature stable and accurate over theautomotive temperature range, with a self-test feature that fully exercises all the mechanical and electrical elements of the sensor with a digital signal applied to a single pin. The ADXL193 is available in a 5 mm × 5 mm × 2 mm, 8-terminal ceramic LCC package.FUNCTIONAL BLOCK DIAGRAM05366-001X OUTFigure 1.ADXL193Rev. A | Page 2 of 12TABLE OF CONTENTSSpecifications.....................................................................................3 Absolute Maximum Ratings............................................................4 ESD Caution..................................................................................4 Pin Configuration and Function Descriptions.............................5 Theory of Operation........................................................................7 Applications.......................................................................................8 Power Supply Decoupling............................................................8 Self-Test..........................................................................................8 Clock Frequency Supply Response.............................................8 Signal Distortion...........................................................................8 Outline Dimensions..........................................................................9 Ordering Guide.. (9)REVISION HISTORY5/05—Rev. 0 to Rev. AADXL193Rev. A | Page 3 of 12SPECIFICATIONS 1At T A = −40°C to +105°C, 5.0 V dc ± 5%, acceleration = 0 g ; unless otherwise noted. Table 1.Model No. AD22282Model No. AD22283Parameter Conditions Min Typ Max Min Typ Max Unit SENSOR Output Full-Scale Range I OUT ≤ ±100 μA 120 250 gNonlinearity 0.2 2 0.2 2 %Package Alignment Error 1 1 Degree Cross-Axis Sensitivity −5 +5 −5 +5 % Resonant Frequency24 24 kHz Sensitivity, Ratiometric(Over Temperature) V DD = 5 V, 100 Hz 17.1 18 18.9 7.6 8 8.4 mV/g OFFSETZero-g Output Voltage(Over Temperature)2V OUT − V DD /2, V DD = 5 V −125 +125 −100 +100 mVNOISE Noise Density 10 Hz − 400 Hz, 5 V 3 10 5 15 m g /√Hz Clock Noise 5 5 mV p-p FREQUENCY RESPONSE Two-pole Bessel −3 dB Frequency 360 400 440 360 400 440 Hz−3 dB Frequency Drift 25°C to T MIN or T MAX2 2 Hz SE L F-TESTOutput Change(Cube vs. V DD )3V DD = 5 V 400 500 600 200 250 300 mV Logic Input High V DD = 5 V 3.5 3.5 V Logic Input Low V DD = 5 V 1 1 V Input Resistance Pull-down resistor to GND 30 50 30 50kΩOUTPUT AMP L IFIER Output Voltage Swing I OUT = ±400 μA 0.25 V DD − 0.25 0.25 V DD − 0.25 V Capacitive Load Drive 1000 1000 pF PREFI L TER HEADROOM 800 1400 g CFSR @ 400 kHz 21.5 V/V POWER SUPPLY (V DD ) 4.75 5.25 4.75 5.25 V Functional Range 3.5 6 3.5 6 V Quiescent Supply Current V DD = 5 V 1.5 21.5 2 mA TEMPERATURE RANGE−40 +125−40 +125°C1 All minimum and maximum specifications are guaranteed. Typical specifications are not guaranteed. 2Zero g output is ratiometric. 3Self-test output at V DD = (Self-Test Output at 5 V) × (V DD /5 V)3.ADXL193Rev. A | Page 4 of 12ABSOLUTE MAXIMUM RATINGSTable 2.Parameter RatingAcceleration (Any Axis, Unpowered) 4,000 gAcceleration (Any Axis, Powered) 4,000 gV S −0.3 V to +7.0 VAll Other Pins (COM − 0.3 V) to(V S + 0.3 V) Output Short-Circuit Duration (Any Pin to Common)Indefinite Operating Temperature Range −65°C to +150°CStorage Temperature −65°C to +150°CStresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.ESD CAUTIONESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although this product features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performancedegradation or loss of functionality.ADXL193Rev. A | Page 5 of 12PIN CONFIGURATION AND FUNCTION DESCRIPTIONS05366-002NC = NO CONNECTNCNC COM V DD X OUT NCSTVFigure 2. Pin ConfigurationTable 3. Pin Function DescriptionsPin No. Mnemonic Description 1 NC Do Not Connect 2 NCDo Not Connect3 COM Common4 ST Self-Test5 NC Do Not Connect6 X OUT X Channel Output7 V DD 3.5 V to 6 V8 V DD23.5 V to 6 VADXL193Rev. A | Page 6 of 12T E M P E R A T U R ETIMET TFigure 3. Recommended Soldering ProfileTable 4. Recommended Soldering ProfileProfile Feature Sn63/Pb37 Pb-Free AVERAGE RAMP RATE (T L TO T P ) 3°C/s max3°C/s maxPREHEATMinimum Temperature (T SMIN ) 100°C 150°C Maximum Temperature (T SMAX ) 150°C 200°C TIME (T SMIN TO T SMAX ), t S 60 s − 120 s 60 s − 150 s T SMAX TO T L Ramp-Up Rate 3°C/s 3°C/s TIME MAINTAINED ABOVE LIQUIDOUS (T L ) Liquidous Temperature (T L ) 183°C 217°C Time (t L ) 60 s − 150 s60 s − 150 s PEAK TEMPERATURE (T P ) 240°C + 0°C/−5°C 260°C + 0°C/−5°C TIME WITHIN 5°C OF ACTUAL PEAK TEMPERATURE (t P ) 10 s − 30 s 20 s − 40 s RAMP-DOWN RATE 6°C/s max 6°C/s max TIME 25°C TO PEAK TEMPERATURE 6 min max 8 min max05366-004EARTH'S SURFACE= 2.482VXXXXX XXXX22282X OUT = 2.500VX X X X X X X X X22282X X X X X X X X X22282X OUT = 2.500V X OUT = 2.518VX OUT = 2.500VFigure 4. Output Response vs. OrientationADXL193Rev. A | Page 7 of 12THEORY OF OPERATIONThe ADXL193 provides a fully differential sensor structure and circuit path, resulting in the industry’s highest resistance to EMI/RFI effects. This latest generation uses electrical feedback with zero-force feedback for improved accuracy and stability. The sensor resonant frequency is significantly higher than the signal bandwidth set by the on-chip filter, avoiding the signal analysis problems caused by resonant peaks near the signal bandwidth.Figure 5 is a simplified view of one of the differential sensor elements. Each sensor includes several differential capacitor unit cells. Each cell is composed of fixed plates attached to the substrate and movable plates attached to the frame.Displacement of the frame changes the differential capacitance, which is measured by the on-chip circuitry.Complementary 400 kHz square waves drive the fixed plates. Electrical feedback adjusts the amplitudes of the square waves such that the ac signal on the moving plates is 0. The feedback signal is linearly proportional to the applied acceleration. This unique feedback technique ensures that there is no net electrostatic force applied to the sensor. The differentialfeedback control signal is also applied to the input of the filter, where it is filtered and converted to a single-ended signal. 05366-005UNIT SENSINGCELLUNITFORCING CELLFigure 5. Simplified View of Sensor Under AccelerationADXL193Rev. A | Page 8 of 12APPLICATIONSPOWER SUPPLY DECOUPLINGFor most applications, a single 0.1 μF capacitor, C DC , adequately decouples the accelerometer from noise on the power supply. However, in some cases, particularly where noise is present at the 400 kHz internal clock frequency (or any harmonic thereof), noise on the supply can cause interference on the ADXL193’s output. If additional decoupling is needed, a 50 Ω (or smaller) resistor or ferrite bead can be inserted in the supply line. Additionally, a larger bulk bypass capacitor (in the 1 μF to 4.7 μF range) can be added in parallel to C DC .SELF-TESTThe fixed fingers in the forcing cells are normally kept at the same potential as that of the movable frame. When the self-test digital input is activated, the voltage on the fixed fingers on one side of the moving plate in the forcing cells is changed. This creates an attractive electrostatic force, which causes the frame to move toward those fixed fingers. The entire signal channel is active; therefore, the sensor displacement causes a change in V OUT . The ADXL193’s self-test function is a comprehensive method of verifying the operation of the accelerometer. Because electrostatic force is independent of the polarity of the voltage across capacitor plates, a positive voltage is applied in half of the forcing cells, and its complement in the other half of the forcing cells. Activating self-test causes a step function force to be applied to the sensor, while the capacitive coupling term is canceled. The ADXL193 has improved self-test functionality, including excellent transient response and high speed switching capability. Arbitrary force waveforms can be applied to the sensor by modulating the self-test input, such as test signals to measure the system frequency response, or even crash signals to verify algorithms within the limits of the self-test swing. The ST pin should never be exposed to voltages greater than V S + 0.3 V . If this cannot be guaranteed due to the systemdesign (for instance, if there are multiple supply voltages), then a low V F clamping diode between ST and V S is recommended.CLOCK FREQUENCY SUPPLY RESPONSEIn any clocked system, power supply noise near the clock frequency may have consequences at other frequencies. An internal clock typically controls the sensor excitation and the signal demodulator for micromachined accelerometers. If the power supply contains high frequency spikes, they may be demodulated and interpreted as an acceleration signal. A signal appears as the difference between the noise frequency and the demodulator frequency. If the power supply spikes are 100 Hz away from the demodulator clock, there is an output term at 100 Hz. If the power supply clock is at exactly the same frequency as the accelerometer clock, the term appears as an offset.If the difference frequency is outside of the signal bandwidth, the filter attenuates it. However, both the power supply clock and the accelerometer clock may vary with time or temperature, which can cause the interference signal to appear in the output filter bandwidth.The ADXL193 addresses this issue in two ways. First, the high clock frequency eases the task of choosing a power supply clock frequency such that the difference between it and the accelero-meter clock remains well outside of the filter bandwidth.Second, the ADXL193 is the only micromachined accelerometer to have a fully differential signal path, including differential sensors. The differential sensors eliminate most of the power supply noise before it reaches the demodulator. Good highfrequency supply bypassing, such as a ceramic capacitor close to the supply pins, also minimizes the amount of interference. The clock frequency supply response (CFSR) is the ratio of the response at V OUT to the noise on the power supply near the accelerometer clock frequency. A CFSR of 3 means that the signal at V OUT is 3× the amplitude of an excitation signal at V DD near the accelerometer internal clock frequency. This is analogous to the power supply response, except that the stimulus and the response are at different frequencies. The ADXL193’s CFSR is 10× better than a typical single-ended accelerometer system.SIGNAL DISTORTIONSignals from crashes and other events may contain high amplitude, high frequency components. These components contain very little useful information and are reduced by the 2-pole Bessel filter at the output of the accelerometer. However, if the signal saturates at any point, the accelerometer output does not look like a filtered version of the acceleration signal. The signal may saturate anywhere before the filter. For example, if the resonant frequency of the sensor is low, the displacement per unit acceleration is high. The sensor may reach the mechanical limit of travel if the applied acceleration is high enough. This can be remedied by locating the accelerometer where it does not see high values of acceleration and by using a higher resonant frequency sensor, such as the ADXL193.Also, the electronics may saturate in an overload condition between the sensor output and the filter input. Ensuring that internal circuit nodes operate linearly to at least several times the full-scale acceleration value can minimize electricalsaturation. The ADXL193 circuit is linear to approximately 8× full scale.ADXL193Rev. A | Page 9 of 12OUTLINE DIMENSIONSBOTTOM VIEWFigure 6. 8-Terminal Ceramic Leadless Chip Carrier [LCC](E-8)Dimensions shown in millimetersADXL193 ORDERING GUIDEModel 1Parts per Reel MeasurementRange SpecifiedVoltage (V) TemperatureRange PackageDescription Package Option AD22282-A-R2 250 ±120 g 5 −40°C to +125°C 8-Terminal Ceramic Leadless Chip Carrier E-8 AD22282-A 3000 ±120 g 5 −40°C to +125°C 8-Terminal Ceramic Leadless Chip Carrier E-8 AD22283-B-R2 250 ±250 g 5 −40°C to +125°C 8-Terminal Ceramic Leadless Chip Carrier E-8 AD22283-B 3000 ±250 g5 −40°C to +125°C 8-Terminal Ceramic Leadless Chip Carrier E-81All models are on tape and reel and are Pb-free parts.ADXL193NOTESRev. A | Page 10 of 12ADXL193 NOTESRev. A | Page 11 of 12ADXL193NOTES©2005 Analog Devices, Inc. All rights reserved. Trademarks andregistered trademarks are the property of their respective owners.D05366–0–5/05(A)Rev. A | Page 12 of 12。

机器视觉英文词汇机器视觉英文词汇Aaberration 像差accessory shoes 附件插座、热靴accessory 附件achromatic 消色差的active 主动的、有源的acutance 锐度acute-matte 磨砂毛玻璃adapter 适配器advance system 输片系统ae lock(ael) 自动曝光锁定af illuminatoraf 照明器af spotbeam projectoraf 照明器af(auto focus) 自动聚焦algebraic operation 代数运算一种图像处理运算，包括两幅图像对应像素的和、差、积、商。

aliasing 走样（混叠）当图像象素间距和图像细节相比太大时产生的一种人工痕迹。

alkaline 碱性ambient light 环境光amplification factor 放大倍率analog input/output boards 模拟输入输出板卡analog-to-digital converters 模数转换器ancillary devices 辅助产品angle finder 弯角取景器angle of view 视角anti-red-eye 防红眼aperture priority(ap) 光圈优先aperture 光圈apo(apochromat) 复消色差application-development software 应用开发软件application-specific software 应用软件apz(advanced program zoom) 高级程序变焦arc 弧图的一部分；表示一曲线一段的相连的像素集合。

area ccd solid-state sensors 区域ccd 固体传感器area cmos sensors 区域cmos传感器area-array cameras 面阵相机arrays 阵列asa(american standards association) 美国标准协会asics 专用集成电路astigmatism 像散attached coprocessrs 附加协处理器auto bracket 自动包围auto composition 自动构图auto exposure bracketing 自动包围曝光auto exposure 自动曝光auto film advance 自动进片auto flash 自动闪光auto loading 自动装片auto multi-program 自动多程序auto rewind 自动退片auto wind 自动卷片auto zoom 自动变焦autofocus optics 自动聚焦光学元件automatic exposure(ae) 自动曝光automation/robotics 自动化/机器人技术automation 自动化auxiliary 辅助的Bback light compensation 逆光补偿back light 逆光、背光back 机背background 背景backlighting devices 背光源backplanes 底板balance contrast 反差平衡bar code system 条形码系统barcode scanners 条形码扫描仪barrel distortion 桶形畸变base-stored image sensor (basis) 基存储影像传感器battery check 电池检测battery holder 电池手柄bayonet 卡口beam profilers 电子束仿形器beam splitters 光分路器bellows 皮腔binary image 二值图像只有两级灰度的数字图像（通常为0和1，黑和白）biometrics systems 生物测量系统blue filter 蓝色滤光镜blur 模糊由于散焦、低通滤波、摄像机运动等引起的图像清晰度的下降。

数字滤波器的仿真与实现 - 中英文翻译东南大学成贤学院毕业设计外文翻译电子工程系电子信息工程专业学生姓名：公冶允懋学号： 01408146 设计地点：东南大学成贤学院指导教师：李东新Thal filterWith the information age and the advent of the digital world, digital signal processing has become one of today's most important disciplines and door technology. Digital signal processing in communications, voice, images, automatic control, radar, military, aerospace, medical and household appliances, and many other fields widely applied. In the digital signal processing applications, the digital filter is important and has been widely applied.1、 figures Unit on : Analog and digital filtersIn signal processing, the function of a filter is to remove unwanted parts of the signal, such as random noise, or to extract useful parts of the signal, such as the components lying within a certain frequency range.The following block diagram illustrates the basic idea.There are two main kinds of filter, analog and digital. They are quite different in their physical makeup and in how they work. An analog filter uses analog electronic circuits made up from components such as resistors,capacitors and op amps to produce the required filtering effect. Such filter circuits are widely used in such applications as noise reduction, video signal enhancement, graphic equalisers in hi-fi systems, and many other areas. There are well-established standard techniques for designing an analog filtercircuit for a given requirement. At all stages, the signal being filtered isan electrical voltage or current which is the direct analogue of the physical quantity (e.g. a sound or video signal or transducer output) involved. Adigital filter uses a digital processor to perform numerical calculations on sampled values of the signal. The processor may be a general-purpose computer such as a PC, or a specialised DSP (Digital Signal Processor) chip. The analog input signal must first be sampled and digitised using an ADC (analog todigital converter). The resulting binary numbers, representing successive sampled values of the input signal, are transferred to the processor, which carries out numerical calculations on them. These calculations typicallyinvolve multiplying the input values by constants and adding the products together.If necessary, the results of these calculations, which now represent sampled values of the filtered signal, are output through a DAC (digital to analog converter) to convert the signal back to analog form.Note that in a digital filter, the signal is represented by a sequence of numbers, rather than a voltage or current.The following diagram shows the basic setup of such a system.Unit refers to the input signals used to filter hardware or software. Ifthe filter input, output signals are separated, they are bound to respond tothe impact of the Unit is separated, such as digital filters filter definition. Digital filter function, which was to import sequences X transformation into export operations through a series Y.According to figures filter function 24-hour live response characteristics, digital filters can be divided into two, namely, unlimited long live long live the corresponding IIR filter and the limited response to FIR filters. IIRfilters have the advantage of the digital filter design can use simulation results, and simulation filter design of a large number of tables mayfacilitate simple. It is the shortcomings of the nonlinear phase; Linear phaseif required, will use the entire network phase-correction. Image processingand transmission of data collection is required with linear phase filtersidentity. And FIR linear phase digital filter to achieve, but an arbitrarymargin characteristics. Impact from the digital filter response of the unitscan be divided into two broad categories : the impact of the limited response(FIR) filters, and unlimited number of shocks to (IIR) digital filters.FIR filters can be strictly linear phase, but because the system FIRfilter function extremity fixed at the original point, it can only use thehigher number of bands to achieve their high selectivity for the same filterdesign indicators FIR filter called band than a few high-IIR 5-10 times, thecost is higher, Signal delay is also larger. But if the same linear phase, IIRfilters must be network-wide calibration phase, the same section also increasethe number of filters and network complexity. FIR filters can be used toachieve non-Digui way, not in a limited precision of a shock, and into thehomes and quantitativefactors of uncertainty arising from the impact of errors than IIR filtersmall number, and FIR filter can be used FFT algorithms, the computationalspeed. But unlike IIR filter can filter through the simulation results, thereis no ready-made formula FIR filter must use computer-aided design software(such as MATLAB) to calculate. So, a broader application of FIR filters, andIIR filters are not very strict requirements on occasions.Unit from sub-functions can be divided into the following four categories :(1) Low-filter (LPF); (2) high-filter (HPF); (3) belt-filter (BPF); (4) toprevent filter (BSF).The following chart dotted line for the ideals of the filter frequencycharacteristics : A1(f) A2(f)1 10 fc2 f 0 fc2 f (a)(b) A3(f) A4(f)1 10 fc1 fc2 f 0 fc1 fc2 f (c)(d) (a)LPF (b)HPF (c)BPF (d)BSF2、 MATLAB introducedMATLAB is a matrix laboratory (Matrix Laboratory) is intended. In addition to an excellent value calculation capability, it also provides professional symbols terms, word processing, visualization modeling, simulation and real-time control functions. MATLAB as the world's top mathematical software applications, with a strong engineering computing, algorithms research, engineering drawings, applications development, data analysis and dynamic simulation, and other functions, in aerospace, mechanical manufacturing and construction fields playing an increasingly important role. And the C language function rich, the use offlexibility, high-efficiency goals procedures. High language both advantages as well as low level language features. Therefore, C language is the most widely used programming language. Although MATLAB is a complete,fully functional programming environment, but in some cases, data and procedures with the external environment of the world is very necessary and useful. Filter design using Matlab, could be adjusted with the design requirements and filter characteristics of the parameters, visual simple, greatly reducing the workload for the filter design optimization.In the electricity system protection and secondary computer control, many signal processing and analysis are based on are certain types Yeroskipou and the second harmonics of the system voltage and current signals (especially at D process), are mixed with a variety of complex components, the filter has been installed power system during the critical components. Current computer protection and the introduction of two digital signal processing software main filter. Digital filter design using traditional cumbersome formula, the need to change the parameters after recalculation, especially in high filters,filter design workload. Uses MATLAB signal processing boxes can achieve rapid and effective digital filter design and simulation.MATLAB is the basic unit of data matrix, with its directives Biaodashi mathematics, engineering, commonly used form is very similar, it is used to solve a problem than in MATLAB C, Fortran and other languages End precision much the same thing. The popular MATLAB 5.3/Simulink3.0 including hundreds of internal function with the main pack and 30 types of tool kits (Toolbox). kits can be divided into functional tool kits and disciplines toolkit. MATLAB tool kit used to expand the functional symbols terms, visualization simulation modelling, word processing and real-time control functions. professionaldisciplines toolkit is a stronger tool kits, tool kits control, signal processing tool kit, tool kits, etc. belonging to such communicationsMATLAB users to open widely welcomed. In addition to the internal function, all the packages MATLAB tool kits are readable document and the document could be amended, modified or users through Yuanchengxu the construction of new procedures to prepare themselves for kits.3、 Digital filter designDigital filter design of the basic requirements Digital filter design must go through three steps :(1) Identification of indicators : In the design of a filter, there mustbe some indicators. These indicators should be determined on the basis of the application. In many practical applications, digital filters are often used to achieve the frequency operation. Therefore, indicators in the form of general jurisdiction given frequency range and phase response. Margins key indicators given in two ways. The first is absolute indicators. It provides a感谢您的阅读，祝您生活愉快。

精心整理一、FilterSolutions 滤波器设计软件中的英文注解Lowpassnotchfilters:低通陷波滤波器 Order:阶filtercircuits:滤波电路 frequencyresponse :幅频响应 Passband:通频带、传输带宽 repeatedlycycle ：重复周期maximumsignaltonoiseratio ：最大信噪circuitboard:(实验用)电路板 activefilters:有源滤波器 supplycurrents:源电流 powersupplies:电源bypassingcapacitors:旁路电容 optimal:最佳的;最理想的 GainBandwidth:带宽增益 passivecomponent:无源元件 斯；Chebyshev1切比雪夫1；Chebyshev2切比雪夫2；Hourglass ：对三角滤波器、Elliptic ：椭圆滤波器、Custom ：自定义滤波器、RaisedCos ：升余弦滤波器、Matche ：匹配滤波器、Delay ：延迟滤波器）；２、在filterclass 中选择滤波器的种类（低通、高通、带通、带阻）； ３、在filterAttributes 中设置滤波器的阶数（Order ）、通频带频率（Passband frequency ）；４、在Implementation 中选择有源滤波器（active ）、无源滤波器（passive ）和数字滤波器（Digital ）；５、在FreqScale中选择Hertz和Log，如果选择了Rad/Sec，则要注意Rad/Sec ＝6.28＊Hertz；６、在GraphLimits中设置好图像的最大频率和最小频率，最大频率要大于通频带的截止频率；在PassiveDesign/IdealFilterResponse中观察传输函数(TransferFunction)、时域响应(TimeResponse)、零极点图(PoleZeroPlots)、频域响应(FrequencyResponse)的图像；７、在CircuitParmaters中设置源电阻(SourceRes)和负载电阻(LoadRes);最后点击Circuits观察滤波器电路图；70M/77.31M=1.104;当选择Freq（频率）时，StopBandAtten（阻带衰减）应该选择77.31M.６、在GraphLimits中设置好图像的最大频率和最小频率，最大频率要大于通频带的截止频率我们设置为100M；在PassiveDesign/IdealFilterResponse中观察传输函数(TransferFunction)、时域响应(TimeResponse)、零极点图(PoleZeroPlots)、频域响应(FrequencyResponse)的图像；７、在CircuitParmaters中设置源电阻(SourceRes)我们设为200欧和负载电阻(LoadRes)我们同样设为200欧;最后点击Circuits观察滤波器电路图；点击TransferFunction查看传递函数：点击TimeResponse查看响应曲线。

关于滤波器专业英语作文Introduction。

Filters are electronic circuits that selectively allow certain frequencies to pass through while attenuating others. They are used in a wide range of applications, from audio and video processing to power supplies and communication systems. In this essay, we will explore the different types of filters, their characteristics, andtheir applications.Types of Filters。

Filters can be classified into two main categories: passive filters and active filters. Passive filters use only passive components such as resistors, capacitors, and inductors to filter out unwanted frequencies. Active filters, on the other hand, use active components such as transistors, operational amplifiers, and digital signal processors to amplify, attenuate, or shift frequencies.Passive Filters。

Passive filters are the simplest type of filters and are widely used in audio and video processing. They can be further classified into three types: low-pass filters, high-pass filters, and band-pass filters.Low-pass filters allow low frequencies to pass through while attenuating high frequencies. They are commonly used in audio systems to filter out noise and unwanted signals. High-pass filters, on the other hand, allow high frequencies to pass through while attenuating low frequencies. They are used in applications such as radio communication and audio equalization.Band-pass filters allow a range of frequencies to pass through while attenuating frequencies outside the range. They are used in applications such as radio frequency (RF) communication and audio processing.Active Filters。

a alloy a铝合金a metal a镍铬铁耐热合金a-frame 人字扒杆a-framed derrick 人字起重机a-line skirt a字形裙a-naphthylthiourea 萘硫脲a-rest 嘧啶醇a-scope a型显示器a-tell fibre 荣辉纤维a-type chromium door handle 镀铬a型门拉手aateck 福代硫aatram 津安混剂aatrex 4l+lasso 4ec 阿草混剂一号aatrex 4l+paraquat cl 阿快混剂一号aatrex 4l+princep 4l 阿西混剂aatrex 80w+lasso 4ec 阿草混剂二号aatrex 80w+paraquat cl 阿快混剂二号aatrex 阿特拉津aba 宽大无袖长袍abaca 蕉麻abacaxi fibre 菠萝叶纤维abacus 算盘abalone mushroom 鲍菇abalone pearl 鲍珍珠abalone 鲍鱼abaptiston 安全开颅圆锯abar 对溴磷abassi cotton 阿巴西棉abat 双硫磷abathion 双硫磷abba mantle cloth 阿伯披风呢abbe condenser 阿贝聚光镜abbe prism 阿贝棱镜abbe refractometer 阿贝折射计abbertite 黑沥青abbokinase injection 雅激酶注射液abbot's cloth 粗厚方平织物abbotsford 艾博茨福德女式呢abc extra stout 虎牌黑啤abc silk 爱皮西绸abdomen retractor 腹部拉钩abdominal bandage 肚带abdominal belt 腹带abdominal binder 腹带abdominal fixing apparatus 腹部固定器abdominal pad 腹垫abdominal protector 护腹具abdominal retractor 大腹壁钩abdominal spatulas 压肠板abdominal suction tube 腹腔吸管abdominal wall retainer 腹壁固定器abdominal water transferring machine 腹水转流机abdullah kani 阿布杜拉卡尼绸abee 阿比平纹棉毛呢abel closed cup flash point apparatus 阿贝尔闭杯闪点测定仪abel flash point tester 阿贝尔闪点试验器abelite 阿贝立特炸药abelmoschus fibre 秋葵属韧皮纤维abercrombie 艾伯克龙比格子呢aberdeen hose 阿伯丁短毛袜abernathyite 水砷钾铀矿aberrometer 象差计abherent 防粘剂abienic balsam 冷杉胶abies oil 松香油abietane 松香烷abietence 松香烯abietic acid 松香酸abietin 松香亭abietyl 松香abis messaline taffeta 阿比斯迈萨林塔夫绸ablation coating 烧蚀涂层ablation meter 烧蚀表ablative cooling material 烧蚀冷却材料ablative insulative plastics 烧蚀绝缘塑料ablative-insulative material 烧蚀隔热材料ablatograph 融化测量仪ablator 烧蚀剂abnakee rug 阿布纳基钩针地毯abney clinometer 阿布尼测斜器abney level 手水准仪aboktal 甲氟哌酸aboral porcelain tube 反口瓷管abortici 堕胎药abortifacientia 堕胎药abortive calfskin cushion 胎牛皮靠垫abortive calfskin plate 胎牛皮褥子abortive calfskin 胎牛皮aboucouchous 阿布库舒低级呢aboutsledge 大铁锤above-the-knee boots 过膝高统靴abradant 研磨剂abraded filament yarn 擦毛长丝纱abraded yarn 擦毛丝abrader 磨光机abrading device 磨耗试验器abrading machine 研磨机abradum 抛光氧化铝粉abrased glass 磨光玻璃abraser paste 研磨膏abraser 磨料abrasion machine 磨损试验机abrasion drill 回旋钻abrasion machine 磨耗试验机abrasion resistance tester 耐磨试验机abrasion resistant alloy 耐磨合金abrasion resistant carbon black 耐磨炭黑abrasion resistant cast iron 耐磨铸铁abrasion resistant optical fiber 耐磨光纤abrasion resistant steel 耐磨钢abrasion resisting alloy 耐热合金abrasion tester 耐磨试验仪abrasion wheel 砂轮abrasite 刚铝石abrasive band grinding machine 砂带研磨机abrasive belt grinding machine 砂带磨床abrasive belt surface grinder 平面砂带磨床abrasive belt 砂带abrasive chip 抛磨块abrasive cleaner 擦洗剂abrasive cloth flapwheel 砂布页轮abrasive cloth 砂布abrasive cutoff machine 磨切机abrasive cutting wheel 切割砂轮abrasive disc 砂轮abrasive fabric 砂布abrasive file 方头锉abrasive grain 研磨砂abrasive jet cleaner 喷砂清理机abrasive machine 研磨机abrasive material 磨料abrasive molding hydraulic press 磨料制品液压机abrasive mounted wheel 磨头abrasive paper for metallograph 金相砂纸abrasive paper for wood 木砂纸abrasive paper 砂纸abrasive powder 研磨粉abrasive product 磨料制品abrasive sawing machine 研磨锯床abrasive segment 砂瓦abrasive soap 擦洗皂abrasive stick 油石棒abrasive stone 磨石abrasive tester 磨损试验机abrasive tip 磨头abrasive tool 磨具abrasive wheel for worm grinding 蜗杆磨砂轮abrasive wheel 磨轮abrasive 研磨材料abrasive-wheel cutting machine 砂轮切割机abrasor 擦除器abrator 抛喷清理机abrazite 水钙沸石abriachanite 镁铁青石棉abricotine 杏子酒abridged spectrophotometer 滤色光度计abrohany 印度薄细布abroma fibre 昂天莲属纤维abros 阿布劳斯镍铬锰耐蚀合金abrupt-junction diode 突变结二极管abrupt-junction doubler 突变结倍频器abscess probe 脓肿探针absinth 苦艾absinthol 侧柏酮absite 钍钛铀矿absolute alcohol 无水酒精absolute altimeter 绝对高度计absolute conductor 绝对导体absolute electrometer 绝对静电计absolute ethyl alcohol 无水乙醇absolute ethyl ether 无水乙醚absolute frequency meter 绝对频率计absolute galvanometer 绝对电流计absolute gravimeter 绝对重力仪absolute h-magnetometer 绝对h磁强计absolute interferometric laser 绝对干涉测量激光器absolute manometer 绝对压力计absolute marine combined magnetometer 海洋组合式绝对磁力仪absolute of jasmine 茉莉净油absolute of rose crimson glory 墨红花净油absolute pressure gauge 绝对压力计absolute pressure switch 绝对压力开关absolute pressure transducer 绝对压力传感器absolute pressure vacuum gauge 绝对压力真空计absolute pyrheliometer 绝对日射强度计absolute recording spectrofluorimeter 全记录式荧光光谱仪absolute rotary encoder 绝对式旋转编码器absolute spectrofluorimeter 绝对荧光光谱仪absolute thermometer 绝对温度计absolute vacuum gauge 绝对真空计absolute viscometer 绝对粘度计absolutely single polarization fiber 绝对单偏振光纤absorbable stanching satin 吸收性止血绫absorbance monitor 吸收度监测器absorbed current amplifier 吸收电流放大器absorbefacient 吸收剂absorbent bandages 脱脂绷带absorbent charcoal 活性炭absorbent cotton wool 脱脂药棉absorbent cotton 脱脂棉absorbent filter 吸收性过滤器absorbent gauze bandage 脱脂纱布绷带absorbent gauze cloth 脱脂纱布absorbent gauze with x-ray detectable thread x射线追踪线纱布absorbent gauze 脱脂纱布absorbent lint 医用绒布absorbent oil 吸收油absorbent paper 吸水纸absorbent textile fiber 吸收性纺织纤维absorbent 吸收剂absorber cooler 吸收塔冷却器absorber diode 吸收二极管absorber pump 吸收器泵absorber washer 吸收洗涤器absorber 吸收器absorber-demethanizer 吸收-脱甲烷塔absorbing apparatus 吸收仪器absorbing coil 吸收线圈absorbing column 吸收塔absorbing selector 吸收选择器absorbing spectacle glass 吸光眼镜玻璃absorbing tower 吸收塔absorptiometer 吸光计absorption bottle 吸收瓶absorption coil 吸收盘管absorption color filter 吸收滤色器absorption column 吸收塔absorption dynamometer 吸收功率计absorption epr spectrometer 吸收电子顺磁共振频谱仪absorption fabric 吸收性织物absorption filter 吸收滤光片absorption flask 吸收瓶absorption frequency meter 吸收式频率计absorption heat pump 吸收式热泵absorption hygrometer 吸收湿度计absorption infrared spectrometer 吸收红外光谱仪absorption meter 溶气计absorption pipette 吸收球管absorption plant 吸收装置absorption pump 吸收泵absorption pyrometer 吸收式光学高温计absorption refrigerating machine 吸收式制冷机absorption refrigerator 吸收式冰箱absorption silencer 吸收式消音器absorption spectrometer 吸收光谱仪absorption tower 吸收塔absorption tray 吸收盘absorption tube 吸收管absorption turbidimeter 吸收浊度计absorption type radioactive transmission gauge 吸收式放射性透射量计absorption unit of dioxide carbon 二氧化碳吸收器absorption wave meter 吸收式波长计absorption-type filter 吸收式过滤器absorptivity wavemeter 吸收式波长计abstergent 洗涤剂abstract card 文摘卡abukumalite 硅磷灰石abutilon fibre 苘麻纤维abutilon string 苘麻缝包线abutilon waste 苘麻废绒abutilon 苘麻abutted stitching sewing machine for fur 毛皮拼缝机abyssinian gold 埃塞俄比亚假金ac & dc arc welding machine 交直流弧焊机ac & dc wet-type electromagnet for valve 交直流湿式阀用电磁铁ac ammeter 交流安培计ac amplifier 交流放大器ac analog computer 交流模拟计算机ac arc welder 交流弧焊机ac arc welding machine 交流弧焊机ac argon arc welding machine with non-consumable tungsten electrode 交流非自耗钨熔化极氩弧焊机ac automatic regulator 交流自动调节器ac balancer 交流平衡器ac blowing agent 交流发泡剂ac bridge 交流电桥ac capacitor-start totally-enclosed fractional horsepower motor 交流电容起动全封闭小马力电动机ac centrifugal blower 离心式交流吹风机ac clip-on ammeter 钳形交流电流表ac clip-on voltammeter 钳形交流电压电流表ac commutator machine 交流换向器式电机ac commutator motor 交流换向器式电动机ac commutator type exciter 交流换向器式励磁机ac constant torque induction motor for cargo winch 起货用交流恒转矩感应电动机ac contactor 交流接触器ac control magnet 交流控制磁铁ac earth relay 交流接地继电器ac electric motor 交流电动机ac electric welding machine 交流电焊机ac electromagnet for valve 阀用交流电磁铁ac electronic voltage stabilizer 交流电子稳压器ac energized lamp 交流激励灯ac erasing magnetic head 交流抹音磁头ac exciter terminal box 交流励磁机接线盒ac exciter 交流激励器ac frequency conversion speed regulator 交流变频调速器ac galvanometer 交流电流计ac generator set 交流发电机组ac generator 交流发电机ac heated diode 旁热式二极管ac indication relay 交流指示继电器ac indicator 交流指示器ac machine 交流电机ac magnetic contactor 交流磁力接触器ac magnetic starter 交流磁力起动器ac manual regulator 交流手动稳压器ac measuring instrument 交流测量仪器ac mercury arc lamp 交流水银汽弧灯ac meter 交流电流计ac microsynchronous motor 交流微型同步电机ac motor for cargo winch 起货交流电机ac motor speed regulator 交流电动机调速器ac motor starter 交流电动机起动器ac motor with slip-ring sliding 滑环式交流电动机ac motor 交流电动机ac moving coil rectangular instrument 交流动圈式矩形电表ac moving coil round instrument 交流动圈式圆形电表ac moving iron rectangular instrument 交流动铁式矩形电表ac moving iron round instrument 交流动铁式圆形电表ac potentiometer 交流电位计ac power source voltage regulator 交流电源调压器ac reactor 交流电抗器ac receiver 交流接收机ac rectifying type rectangular instrument 交流整流式方形电表ac rectifying type round instrument 交流整流式圆型电表ac relay 交流继电器ac self-rectifying wet-type valve 交流自整流湿式整流管ac series motor 交流串激电动机ac servo drive system 交流伺服驱动系统ac servo motor 交流伺服电机ac servo speed indicating generator set 交流伺服测速发电机组ac shaft generator 轴附带交流发电机ac shunt motor 交流并激电动机ac shunt wound generator 交流并绕发电机ac solenoid for driving hydraulic-valve 液压阀用交流电磁铁ac solenoid for valve 交流阀用电磁铁ac spindle drive syetem 交流主轴驱动系统ac split-phase start totally enclosed frictional horsepower motor 交流分相起动全封闭小马力电动机ac stabilified-voltage power 交流稳压电源ac static converter 交流静态换流器ac synchronous generator 交流同步发电机ac tachometer 交流转速表ac testing transformer 交流试验变压器ac three-phase asynchronous lifting motor 起重用交流三相异步电动机ac three-phase asynchronous motor 交流三相异步电动机ac transducer 交流电流变换器ac transformer 交流变压器ac tube 交流管ac type iron sheet thickness gauge 交流式铁板厚度计ac ventilating fan 交流排气风扇ac vibrating type automatic voltage regulator 交流振动型自动电压调整器ac voltage electromagnetic relay 交流电压电磁继电器ac voltage regulator 交流调压器ac voltage stabilizer 交流稳压器ac voltmeter 交流伏特计ac watthour meter 交流瓦特小时计ac wattmeter 交流瓦特计ac welder 交流焊接机ac wet type electromagnet for valve 交流湿式阀用电磁铁ac winding 交流绕组ac-dc clip-on ammeter 钳形交直流电流表ac-dc digital voltage meter 交直流两用数字电压表ac-dc receiver 交直流两用接收机acacia gum 阿拉伯橡胶acacia honey soaked white fungus 雪耳槐花蜜acacia leucophloca 银叶相思树韧皮纤维acacia 阿拉伯胶academicals 大学礼服acadiane 阿卡迪安牌汽车acala cotton 阿卡拉棉acanthine gum 金合欢胶acanthopanax bark 五加皮acanthopanax capsule 刺五加养生素acanthopanax infusion 五加参冲剂acanthopanax root tablet 刺五加片acanthopanax senticosus tablet 刺五加片acanthopanax spinosus mig. 五加皮acanthopanax 刺五加acaprazine 阿卡嗪acar 乙酯杀螨醇acaraben 乙酯杀螨醇acaralate 丙酯杀螨醇acarbose 阿卡波糖acaricide unguent 肤螨灵软膏acaricide 杀螨剂acarin 开乐散acaroid gum 草树胶acaroid resin 禾木树脂acarol 溴螨酯acaron 杀虫脒accelerant 促染剂accelerate 草藻灭accelerated cement 快凝水泥accelerated electron engine 加速电子发动机accelerated paint weathering machine 加速油漆耐老化试验机accelerated polishing machine 加速磨光机accelerating agent 催化剂accelerating jet 加速喷射器accelerating nozzle 加速喷嘴accelerating pump 加速泵accelerating relay 加速继电器acceleration and vibration transducer 加速和震动传感器acceleration cancelling hydrophone 加速补偿水听器acceleration detector 加速度检波器acceleration limiter 加速限制器acceleration meter 加速度计acceleration recorder 加速记录器acceleration seismograph 加速度地震记录仪acceleration seismometer 加速度地震仪acceleration transducer 加速度传感器acceleration-insensitive gyroscope 加速不敏感陀螺仪accelerator jar 加速式震击器accelerator pedal 加速器踏板accelerator 加速计accelerograph 加速自记器accelerometer tube 加速度测量管accelerometer type seismometer 加速度式地震检滤器accelerometer 加速表accelerotor 埃克西来罗试验仪accelofilter 加速过滤机accent light 强光灯accentuator 音频强化器access arm 存取臂access control module 存取控制模块access controller 存取控制器access coupler 存取耦合器accessible compressor 半封闭式压缩机accessories for steel rail 钢轨配件accessories 辅料accessory case 附件箱accessory equipment 辅助设备accessory filter 辅助滤波器accessory for machine tool 机床附件accoloy 阿科洛伊镍铬耐热合金accommodation ladder winch 舷梯绞车accompanying fabric 贴衬织物accompanying sound trap 伴音陷波器accord 阿科德牌汽车accordion cable 折叠电缆accordion coil 折状线圈accordion conveyer 折叠式输送机accordion door 折叠门accordion fabric 单面提花针织物accordion pipe 波纹管accordion pleated skirt 百褶裙accordion 手风琴accothion 杀螟松account book paper 帐薄纸account book 帐簿account checking machine 会计稽核机accounting computer 帐表专用计算机accounting device 计算装置accounting machine 费率结算机accumulated evaporimeter 累积蒸发计accumulating conveyer 储运机accumulating lamp 聚光灯accumulating register 累加寄存器accumulation distribution unit 累加分配器accumulation type wire drawing machine 无滑动多次拉丝机accumulative rain gauge 累积雨量器accumulator box 蓄电池箱accumulator car 电瓶车accumulator cell 蓄电池accumulator container 蓄电池壳accumulator grid 蓄电池极板栅accumulator insulator 蓄电池绝缘子accumulator jar 蓄电池瓶accumulator metal 蓄电池合金accumulator multidraft machine 无滑动多次拉丝机accumulator plate 蓄电池极板accumulator railcar 电瓶轨道车accumulator register 累加寄存器accumulator still 缓冲釜accumulator switch 蓄电池转换开关accumulator tank 缓冲罐accumulator tray 集油盘accumulator 蓄电池accurate complete equipment 精密成套设备accurate position finder 精密测位仪accurate positon indicator 精密位置指示器accurate sweep generator 精密扫描发生器accurate type wire wound resistor 精密线绕电阻器accurate wool 卷曲度正常的羊毛accutron 电子手表ace-tarsoni 滴维净acebrochol 醋布洛可aceburic acid 醋羟丁酸acebutolol 醋丁洛尔acecainide 乙酰卡胺acecarbromal 醋卡溴脲aceclidine 醋克立定acedapsone 醋氨苯砜acediasulfone sodium 醋地砜钠acefylline piperazine 哌醋茶碱aceglatone 醋葡醛内酯aceglutamide 乙酰谷酰胺acelan 阿塞纶聚丙烯腈短纤维acelba 阿策尔巴乙酰化粘胶纤维acele 阿西尔醋酯纤维acemetacin 阿西美辛acenaphthene 二氢苊acenaphthenequinone 苊醌acenaphthylene 苊acenocoumarol 醋硝香豆醇aceperone 醋哌隆acephate 乙酰甲胺磷acepromazine 乙酰丙嗪aceprometazine 醋异丙嗪acer theiferum fang 桑牙茶acerdol 高锰酸钙acet 乙酰aceta 阿策塔醋酯长丝acetal adhesive solution 缩醛胶液acetal baking adhesive solution 缩醛烘干胶液acetal baking insulating paint 缩醛烘干绝缘漆acetal fibre 缩醛纤维acetal polymer 缩醛缩聚物acetal resin 缩醛树脂acetal 缩醛acetaldehyde cyanohydrin 乙醛氰醇acetaldehyde resin 乙醛树脂acetaldehyde 乙醛acetalized fibre 缩醛化纤维acetamide 乙酰胺acetamidoeugenol 醋胺丁香酚acetaminophen 醋胺酚acetaminosalol 醋氨沙罗acetanilide powder 退热粉acetanilide 乙酰替苯胺acetarsol 乙酰胂胺acetat rhodia 阿策塔特罗迪阿醋酯短纤维acetate butyrate rayon 醋酯-丁酯人造丝acetate cellulose fibre 醋酯纤维acetate colour 醋酸性染料acetate crepe 醋酯绉绸acetate crepe-back satin 醋酯背绉缎acetate disc 醋酸酯唱片acetate dye 醋酯纤维染料acetate fibre paste 醋纤浆料acetate fibre 醋酯纤维acetate filament 醋酯长丝acetate film 醋酸纤维胶片acetate hollow filament 醋酯中空长丝acetate moire 醋酯丝波纹绸acetate of lead 铅醋酸盐acetate panne satin 醋酯丝光面缎acetate rayon filament 醋酯人造丝acetate rayon staple 醋酯短纤维acetate rayon 醋酯人造丝acetate satin 醋酯丝缎acetate sharkskin 醋酯丝雪克斯丁acetate sheeting 醋酸纤维片材acetate silk 醋酸人造丝acetate spinning machine 醋酯纤维纺丝机acetate spun yarn 醋酯纱acetate staple fibre 醋酯短纤维acetate stockinette 醋酯弹力织物acetate twill lining 醋酯丝斜纹里子绸acetate visor 醋酸纤维护目镜acetate voile 醋酯巴里纱acetate wool 醋酯人造毛acetate 醋酸盐acetate-viscose blend 醋-粘混纺acetazolamide diamox 醋氮酰胺acetazolamide 乙酰唑胺acethion 家蝇磷acethxybenzamide 止痛灵acetiamine 乙酰硫胺acetic acid rubber 乙酸橡胶acetic acid 乙酸acetic aldehyde 乙醛acetic anhydride 乙酸酐acetic ester 乙酸酯acetic ether 乙酸乙酯acetic oxide 乙酸酐acetic starch 醋酸淀粉acetificator 醋化剂acetifier 醋化器acetimeter 醋酸比重计acetin 醋精acetiromate 醋替罗酯acetoacet-ortho-anisidide 乙酰乙酰邻甲氧基苯胺acetoacet-ortho-chloranilide 乙酰乙酰邻氯苯胺acetoacetanilide 乙酰乙酰苯胺acetoacetate 乙酰乙酸盐acetoacetic acid 乙酰乙酸acetoacetic ester 乙酰乙酸酯acetoacetic ether 乙酰乙酸乙酯acetochlor 乙草胺acetofenate 三氯杀虫酯acetohexamide 醋磺己脲acetomenaphthone 乙酰甲萘醌acetomeroctol 醋辛酚汞acetometer 乙酸比重计acetonaphthone 萘乙酮acetone acid 醋酮酸acetone cyanohydrin 丙酮氰醇acetone dicarboxylic acid 丙酮二羧酸acetone oxime 丙酮肟acetone 丙酮acetonformaldehyde 甲醛丙酮acetonic acid 醋酮酸acetonitrile 乙腈acetonumerator 尿丙酮定量器acetophane 阿西妥芬acetophenazine 醋奋乃静acetophenetidin 非那昔丁acetophenone 苯乙酮acetoxon 乙酯磷acetriptine 乙酰色胺acetrizoic acid 醋碘苯酸aceturic acid 醋尿酸acetyl bromide choline 溴化乙酰胆碱acetyl bromide 溴乙酰acetyl cellulose film 乙酸纤维素薄膜acetyl cellulose sheet 乙酸纤维素薄片acetyl cellulose 乙酸纤维素acetyl chloride 氯乙酰acetyl cyanide 乙酰氰acetyl ethanonlamine 乙酰乙醇胺acetyl fibre 乙酰纤维acetyl hydrate 醋酸acetyl iodide 乙酰碘acetyl iso-eugenol 乙酰基异丁香酚acetyl oxide 醋酸酐acetyl phenol 乙酰苯酚acetyl phenyl hydrazine 乙酰苯肼acetyl salicylic acid 乙酰水杨酸acetyl-gasoline 乙酰汽油acetyl-m-toluidine 乙酰间甲苯胺acetyl-nitrocellulose 乙炔硝化棉acetyl-p-phenylenediamine 乙酰对苯二胺acetyl-p-toluidine 乙酰对甲苯胺acetylacetone nickel 乙酰丙酮镍acetylacetone 乙酰丙酮acetylated cotton 乙酰化棉acetylated phenolic fibre 乙酰化酚醛纤维acetylated staple 乙酰化短纤维acetylating viscose rayon 乙酰化粘胶人造丝acetylator 乙酰化器acetylcholine bromide 溴化乙酰胆碱acetylcholine chloride 氯乙酰胆碱acetylcholine iodide 碘化乙酰胆碱acetylcysteine 乙酰半胱氨酸acetyldigitoxin 醋洋地黄毒甙acetyldigoxin 醋地高辛acetyldihydrocodeine 醋氢可待因acetylene black 乙炔黑acetylene bottle 乙炔瓶acetylene burner 乙炔焊枪acetylene carbon black 乙炔碳黑acetylene compressor 乙炔压缩机acetylene converter 乙炔转化器acetylene cutter 乙炔切割器acetylene cylinder 乙炔瓶acetylene drying device 乙炔干燥器acetylene flasher 乙炔闪光器acetylene gas generator 乙炔气发生器acetylene generator 乙炔发生器acetylene hose 乙炔胶管acetylene lamp 乙炔灯acetylene regulator 乙炔调节器acetylene rubber hose 乙炔软管acetylene stripper 乙炔汽提塔acetylene tetrachloride 四氯化乙炔acetylene welding set 乙炔气焊机acetylene 乙炔acetylenic corrosion inhibitor 乙炔缓蚀剂acetylenyl benzene 乙炔基苯acetylenyl carbinol 乙炔基甲醇acetylfluoride 乙酰氟acetylformic acid 乙酰甲酸acetylfuratrizine 醋呋三嗪acetylglucosamine 乙酰氨基葡萄糖acetylizer 乙酰化器acetylmethadol 醋美沙醇acetylpromazinimaleas 乙酰普吗嗪acetylpropionic acid 乙酰丙酸acetylsalicylic acid compound 复方阿司匹林acetylsalicylic acid powder 阿司匹林粉acetylsalicylic acid tablet 阿司匹林片acetylspiramycin tablet 乙酰螺旋霉素片acetylspiramycin 乙酰螺旋霉素acetylstrophanthidin 醋毒毛花甙元acetylsulfafurazole 醋磺胺异恶唑acetylsulfalene 醋磺胺林acetylsulfamethoxazole 醋磺胺甲恶唑acetylsulfamethoxypyridazine 醋磺胺甲氧嗪acetylthiourea 乙酰硫脲acetysalicylic acid phenobarbital 阿苯acevaltrate 醋戊曲酯acexamic acid 醋己氨酸achene of great burdock 牛蒡子achene of siberian cocklebur 苍耳子achroite 无色电气石achromat 消色差透镜achromatic condenser 消色差聚光器achromatic lens 消色差透镜achromatic magnetic mass spectrometer 消色差磁性质谱仪achromatic objective 消色差物镜achromatic prism 消色差棱镜achromatic telescope 消色差望远镜achromycin 铂霉素aciclovir 阿昔洛维acid pig iron 酸性转炉生铁acid accumulator 酸性蓄电池acid analyser 酸分析器acid and alkali resistant gloves 防酸碱手套acid and alkali-resistant hose 耐酸碱胶管acid anhydride 酸酐acid asbestos 酸性石棉acid azo dye 酸性偶氮染料acid bath 酸脱槽acid battery 酸性电池acid black 酸性黑acid blow case 吹气扬酸箱acid blue black 酸性深蓝acid blue 酸性蓝acid bordeaux 酸性枣红acid bottom 酸性炉底acid brilliant croceine 酸性朱红acid brilliant fuchsine 酸性亮红acid brilliant pink 酸性桃红acid brilliant scarlet 酸性大红acid bronze 耐酸青铜acid brown 酸性棕acid carbonate 酸式醇酸盐acid carboy inclinator 酸坛倾斜器acid carboy 酸坛acid centrifugal pump 酸离心泵acid charysophanic 柯牙素acid chrome black 酸性铬黑acid chrome blue 酸性铬蓝acid chrome brown 酸性铬棕acid chrome dark blue 酸性铬深蓝acid chrome dye 酸性铬媒染料acid chrome green 酸性铬绿acid chrome orange 酸性铬橙acid chrome red 酸性铬红acid chrome yellow 酸性铬黄acid circulating pump 酸循环泵acid clay 酸性土acid complex red 酸性复红acid concentrator 酸浓缩器acid condenser 酸冷凝器acid container 贮酸瓶acid conveying rubber hose 输酸胶管acid cooler 冷酸器acid copper lead 耐酸铜铅合金acid cyanine 酸性菁acid delivery hose 输酸软管acid densimeter 酸浓度计acid direct-arc electric furnace 酸性直接电弧炉acid drop 酸粒糖acid dye 酸性染料acid electrode 酸性焊条acid elevator 升酸器acid ester 酸酯acid etching machine 酸性蚀刻机acid extractor 脱酸机acid feeder 送酸器acid felting 酸毡缩acid filter 滤酸器acid firebrick 酸性耐火砖acid fixer 酸性定影粉acid fixing salt 酸性定影盐acid flesh 酸性果肉acid fluorescence yellow 酸性荧光黄acid fog inhibitor 酸雾抑制剂acid from recovery plant 再生酸acid fuchsine 酸性品红acid gloves with turnback cuffs 反转袖口防酸手套acid gravimeter 酸比重计acid green 酸性绿acid ground glass 毛玻璃acid hydrogen 酸式氢acid hydrometer 酸性液体比重计acid ink blue 酸性墨水蓝acid iron 酸性铁acid lake blue 酸性湖蓝acid light dyestuff 酸性耐光染料acid light yellow 酸性嫩黄acid lined converter 酸性转炉acid lixiviant 酸性浸出剂acid material 酸性材料acid measurer 量酸器acid metal 耐酸金属acid milling dye 酸性耐缩绒染料acid milling 酸缩绒acid modified fibre 酸改性纤维acid modified oxidized etherified potato starch 酸改性氧化醚代马铃薯淀粉acid modified polyester fibre 酸改性聚酯纤维acid mordant black 酸性媒介黑acid mordant blue 酸性媒介蓝acid mordant brown 酸性媒介棕acid mordant dark blue 酸性媒介深蓝acid mordant grey 酸性媒介灰acid mordant navy blue 酸性媒介藏青acid mordant orange 酸性媒介橙acid mordant red 酸性媒介红acid naphthol red 酸性大红acid navy blue 酸性藏青acid oil 酸性油acid open-hearth 酸性平炉acid orange 酸性橙acid pellet 酸性球团acid phosphate 过磷酸钙acid pickled magnesium ingot 酸洗镁锭acid pig 酸性生铁acid printed lustrine 烂花绡acid prolealytic enzyme 酸性蛋白酶acid proof light boots 耐酸轻便靴acid proof paper 耐酸纸acid pump of hard porcelain 硬瓷耐酸泵acid pump 酸泵acid receiver 盛酸器acid red 酸性红acid refractory brick 酸性耐火砖acid refractory 酸性耐火材料acid resistant paper 耐酸纸acid resisting enamel 耐酸瓷漆acid rinse 洗酸剂acid rock 酸性岩acid rose red 酸性玫瑰红acid salt 酸式盐acid scarlet 酸性大红acid separator 除酸器acid setting tank 酸沉降罐acid settler 酸沉降器acid soil 酸性土acid stage oil 酸性油acid steel 酸性钢acid storage battery 酸性蓄电池acid storage tank 储酸罐acid suction hose 吸酸管acid sulfate 酸式硫酸盐acid sulfite 酸式亚硫酸盐acid tank truck 酸罐车acid tank 酸槽acid tar 酸焦油acid tower 制酸塔acid value analyzer 酸值分析仪acid valve 酸阀acid 酸acid-acceptor 吸酸剂acid-azoresorcinol sodium salt 酸偏氮间苯二酚钠acid-base indicator 酸碱指示剂acid-base meter 酸碱测定仪acid-base titration detector 酸碱滴定检测器acid-cured resin 酸凝树脂acid-dipped steel sheet 酸洗薄钢板acid-etched frosted glass 酸蚀毛玻璃acid-free oil 无酸油acid-free paper 无酸纸acid-free tissue paper 无酸薄棉纸acid-frostecl glass 酸蚀毛玻璃acid-processed gelatin 酸法胶acid-proof alloy 耐酸合金acid-proof apparatus 耐酸设备acid-proof asphalt varnish 耐酸沥清漆acid-proof brick 耐酸砖acid-proof cast iron 耐酸铸铁acid-proof casting 耐酸铸件acid-proof cement 耐酸水泥acid-proof ceramic tile 耐酸瓷砖acid-proof ceramics 耐酸陶瓷acid-proof concrete 耐酸混凝土acid-proof enamel 耐酸搪瓷acid-proof fabric 耐酸织物acid-proof fan 耐酸风扇acid-proof floor tile 耐酸地面砖acid-proof gloves 耐酸手套acid-proof half low side boots 耐酸半统靴acid-proof hose 耐酸软管acid-proof ink 耐酸油墨acid-proof iron 耐酸铁acid-proof lining 耐酸衬里acid-proof long gloves 耐酸长手套acid-proof mastic 抗酸胶粘剂acid-proof material 耐酸材料acid-proof overalls 耐酸工装裤acid-proof paint 耐酸漆acid-proof porcelain pump 耐酸陶瓷泵acid-proof pump 耐酸泵acid-proof raglan sleeves 耐酸袖套acid-proof refractory 防酸耐火材料acid-proof resin 耐酸树脂acid-proof rubber apron 耐酸橡皮围裙acid-proof rubber boots 耐酸橡皮靴acid-proof rubber hose 耐酸胶管acid-proof silk 防酸绸acid-proof spirit varnish 抗酸挥发清漆acid-proof steel 耐酸钢acid-proof stoneware 耐酸粗陶瓷acid-proof valve 耐酸阀acid-proof varnish 耐酸漆acid-proof working suit 耐酸工作服acid-refined oil 酸洗油acid-resistant alloy 耐酸合金acid-resistant brick 耐酸砖acid-resistant cast iron 耐酸铸铁acid-resistant coating 耐酸涂料acid-resistant plate 耐酸板acid-resistant refractory brick 耐酸耐火砖acid-resistant rubber sheet 耐酸平胶板acid-resistant steel 耐酸钢acid-resistant stoneware pump 耐酸陶瓷泵acid-resistant stoneware tower 耐酸陶瓷塔acid-resistant stoneware valve 耐酸陶瓷阀门acid-resisting aggregate 耐酸集料acid-resisting alloy 耐酸合金acid-resisting brick 耐酸砖acid-resisting cement 耐酸水泥acid-resisting glass coil 耐酸玻璃蛇管acid-resisting glazed ware fitting 耐酸涂釉陶瓷配件acid-resisting glazed ware pipe 耐酸涂釉陶瓷管acid-resisting iron 耐酸铁acid-resisting material 耐酸材料acid-resisting paint 耐酸漆acid-resisting steel 耐酸钢acid-resisting varnish 耐酸清漆acid-restoring plant 酸回收装置acid-treated oil 酸洗油acid-washed asbestos 酸洗石棉acid-washed limed goat hair 酸洗灰退山羊毛acid-washed limed white goat hair 酸洗灰退白山羊毛acidamide 酰胺acidic refractory 酸性耐火材料acidic resin 酸性树脂acidic shampoo 酸性香波acidified starch 酸解淀粉acidifier 酸化器acidimeter for battery 电池用测酸计acidimeter 酸比重计acidity meter 酸度计acidized graphite granule 酸化石墨粒子acidol dye 阿齐多染料acidometer 酸比重计acidomycin 酸霉素acidulant 酸化剂acidulin 阿齐杜林acidum aceticum 醋酸acidum benzoicum 苯甲酸acidum boricum 硼酸acidum carbolic 石碳酸acidum iopanoicum 碘番酸acidum lacticum 乳酸acidur 阿西杜尔铁硅合金acieral 铝基合金acilan dye 阿西仑染料acipimox 阿西莫司acitrin 阿齐特林ackey 硝硫混合酸浸渍液aclacinon hc1 vial 注射用盐酸安乐霉素aclantate 阿克兰酯aclarubicin hydrochloride 盐酸阿柔比星acme cotton 阿克梅棉acmite 锥辉石acne lotion 防粉剌化妆水acoin 阿可因acolite 低熔合金aconiazid 阿克烟肼aconite bolus for regulating the function of middle-{jiao} 附子理中丸aconite root 乌头根aconite 乌头aconitic acid 乌头酸aconitum chinese paxton 川乌aconitum fischeri peichb 白附子aconitum 乌头acontum fischeri 附子acores 本色麻布acorite 锆石acorn kernel meal 橡子仁粉acorn nut kernel 橡子仁acorn nut 盖形螺母acorn oil 浆栎果油acorus aclamus 菖蒲acorus gramineus soland 九节菖蒲acorus gramineus 石菖蒲acoumeter 测听计acouometer 听力计acouophone 助听器acoustextile 隔音纺织品acoustic alarm 音响报警器acoustic altimeter 声学高度计acoustic board 隔音板acoustic brick 隔音砖acoustic burglar alarm 防盗警报器acoustic celotextile 纤维隔音板acoustic clarifier 声干扰消除器acoustic corrector 声校正器acoustic coupler 声耦合器acoustic damper 消音器acoustic delay-line storage 声延迟线存储器acoustic densitometer 声学密度计acoustic detector 声波探测器acoustic explosive bomb 声响炸弹acoustic felt 吸音毡acoustic fiber board 吸声纤维板acoustic filter 滤声器acoustic frequency generator 声频发生器acoustic frequency measuring instrument 声频测量仪器acoustic frequency signal generator 声频信号发生器acoustic gas analyzer 声学气体分析器acoustic generator 发声器acoustic high-speed holographic framing camera 声学高速全息画面摄影机acoustic image converter 声像转换器acoustic impedance meter 声阻抗仪acoustic instrument 声学仪器acoustic intensity unit 声强仪acoustic interferometer 声干涉仪acoustic jammer 声干扰器acoustic lens 声学透镜acoustic logger 声波测井仪acoustic magnetic mine 音响磁性水雷acoustic memory 声存储器acoustic metanometer 声学甲烷计acoustic meter 噪声仪acoustic microscope 声显微镜acoustic paint 吸声油漆acoustic paper 隔音纸acoustic paramagnetic spectrometer 声学顺磁谱仪acoustic pick-up 拾音器acoustic radiator 声辐射器acoustic radiometer 声辐射计acoustic ranger 声测距仪acoustic ray trace indicator 声线轨迹指示器acoustic releaser 声释放器acoustic remotely controlled survey vehicle 声波遥控测量车acoustic resonator 共鸣器acoustic sand probe 声波探砂器acoustic sensor 声敏元件acoustic shock absorber 减震器acoustic sounder 声波测深器acoustic spectrometer 声频谱计acoustic spectroscope 声谱仪acoustic storage 声存储器acoustic submersible tracker 声学可潜跟踪器acoustic theodolite 声经纬仪acoustic thermometer 声学温度计acoustic tile 吸音板acoustic transducer 声换能器acoustic transformer 声变换器acoustic transponder 声应答器acoustic underwater survey equipment 水声探测设备acoustic velocity logger 声速测井仪acoustic velocity meter 声速测定计acoustic wave filter 声滤波器acoustical anemometer 声学风速表acousticon 助听器acoustimeter 声强测量器acousto-optic crystal 声光晶体acousto-optic filter 声光滤波器acousto-optic modulator 声光调制器acousto-optic receiver 声光接收机acousto-optic tunable filter 声光可调滤波器acousto-optically tuned laser 声光调谐激光器acoustolith tile 吸音贴砖acquarium 金鱼缸acquinite 氯化苦acquisition laser 搜索激光器acquisition radar 搜索雷达acquisition scope 探测显示器acquisition sensor 探测传感器acquisition system 探测系统acrain cotton 阿克雷恩棉acraldehyde 丙炔醛。