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电子信息工程专业英语复习题

Translate the following passages into Chinese or English 。

Unit 2

1、It is extremely hard to definite dynamic range （DR ）for an op amp ，so let is start with a digital-to-analog converter （DAC ） where DR is define as the ratio of the Maximum output voltage to the smallest output voltage the DAC can produce

译文：由于很难定义运算放大器的“动态范围”（DR ），因此先给“数模转换器”（DAC ）的动态范围下定义。DAC 的动态范围就是其最大输出电压和最小输出电压之比。

2、The same definition of DR can be used for an op amp ，and the maximum output voltage swing equals OUTMAX V 。This output voltage swing is defined as the maximum output voltage the op amp can achieve （OH V ） minus the minimum output voltage the op amp can achieve （OL V ）。OH V and OL V are easily obtainable from an op amp IC data sheet 。

译文：这个“动态范围”的定义也可用于运算放大器，其最大输出电压摆幅为OUTMAX V 。输出电压摆幅定义为运算放大器能达到的最大输出电压（OH V ）减去最小输出电压（OL V ）。从运放集成电路数据手册中，可以很容易获得OH V 和OL V 。

3、电压和水有相似之处——当其供应量很少时，人们才会认识到其价值。低电压系统（此处是指低于5V 的单电源供电）让我们认识到电压的价值。

译文：In one respect ，voltage is like water ：you don't appreciate its value until your supply runs low ；Low —voltage systems ，defined here as a single power supply less than 5V ，teach us to appreciate voltage 。

4、在电子技术个领域中，欧姆定律都是基本定律。欧姆定律可表述为R I V ?=。欧姆定律可应用于单个器件、一组器件或一个完整电路。当已知流过电路中各部分的电流时，其电压降可由电阻和电流的乘积获得。

译文：Ohm’s law is stated as R I V ?= ,and it is fundamental to all electronics 。Ohm’s law can be applied to a single component,to any group

of component,or to a complete circuit。When the current flowing through any portion of a circuit is know ,the voltage dropped across that portion of the circuit is obtained by multiplying the current times the resistance。

5、电路就是无源器件和有源器件的组合。器件按照特定方式排列，以完成期望的功能。器件的排列就形成了一个电路，或叫做电路结构。模拟电路设计就是开发各种电路结构。

译文:Circuits are a mix of passive and active components.The components are arranged in a manner that enables them to perform some desired function.The resulting arrangement of components is called a circuit or sometimes a circuit configuration.The art portion of analog design is developing the circuit configuration.

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modeling n建模，造型 simulation n 仿真；模拟 prototype n 原型 array n 排队，编队 vector n 向量，矢量 wavelet n 微波，小浪 sine 正弦cosine 余弦 inverse adj倒转的，反转的n反面；相反v 倒转 high-performance 高精确性，高性能 two-dimensional 二维的；缺乏深度的 three-dimensional 三维的；立体的；真实的 object-oriented programming面向对象的程序设计 spectral adj 光谱的 attenuation n衰减；变薄；稀释 distortion n 失真，扭曲，变形 wavelength n 波长 refractive adj 折射的 ATM 异步传输模式Asynchronous Transfer Mode ADSL非对称用户数字线Asymmetric digital subscriber line VDSL甚高速数字用户线very high data rate digital subscriber line HDSL高速数据用户线high rate digital subscriber line FDMA频分多址(Frequency Division Multiple Access) TDMA时分多址(Time Division Multiple Access) CDMA同步码分多址方式(Code Division Multiple Access) WCDMA宽带码分多址移动通信系统(Wideband Code Division Multiple Access) TD-SCDMA(Time Division Synchronous Code Division Multiple Access)时分同步码分多址 SDLC(synchronous data link control)同步数据链路控制 HDLC(high-level data link control)高级数据链路控制 IP/TCP(internet protocol /transfer Control Protocol)网络传输控制协议 ITU (International Telecommunication Union) 国际电信联盟 ISO国际标准化组织（International Standardization Organization）； OSI开放式系统互联参考模型（Open System Interconnect） GSM全球移动通信系统（Global System for Mobile Communications） GPRS通用分组无线业务(General Packet Radio Service) FDD(frequency division duplex)频分双工 TDD(time division duplex)时分双工 VPI虚路径标识符（Virtual Path Identifier）； ISDN（Integrated Services Digital Network）综合业务数字网 IDN综合数字网（integrated digital network） HDTV (high definition television)高清晰度电视 DCT(Discrete Cosine Transform)离散余弦变换 VCI(virtual circuit address)虚通路标识 MAN城域网Metropolitan area networks LAN局域网local area network WAN广域网wide area network 同步时分复用STDM Synchronous Time Division Multiplexing 统计时分复用STDM Statistical Time Division Multiplexing 单工传输simplex transmission 半双工传输half-duplex transmission 全双工传输full-duplex transmission 交换矩阵Switching Matrix 电路交换circuit switching 分组交换packet switching 报文交换message switching 奇偶校验parity checking 循环冗余校验CRC Cyclic Redundancy Check 虚过滤Virtual filter 数字滤波digital filtering 伪随机比特Quasi Random Bit 带宽分配Bandwidth allocation 信源information source 信宿destination 数字化digitalize 数字传输技术Digital transmission technology 灰度图像Grey scale images 灰度级Grey scale level 幅度谱Magnitude spectrum 相位谱Phase spectrum 频谱frequency spectrum 智能设备Smart Device 软切换Soft handover 硬切换Hard Handover 相干检测Coherent detection 边缘检测Edge detection 冲突检测collision detection 业务集合service integration 业务分离/综合service separation/ integration 网络集合network integration 环形网Ring networks 令牌环网Token Ring network 网络终端Network Terminal 用户终端user terminal 用户电路line circuit 电路利用率channel utilization（通道利用率）相关性coherence 相干解调coherent demodulation 数字图像压缩digital image compression 图像编码image encoding 有损/无损压缩lossy/lossless compression 解压decompression 呼叫控制Call Control 误差控制error control 存储程序控制stored program control 存储转发方式store-and-forward manner 语音\视频传输voice\video transmission 视频点播video-on-demand(VOD) 会议电视Video Conference 有线电视cable television 量化quantization 吞吐量throughput 话务量traffic 多径分集Multipath diversity 多媒体通信MDM Multimedia Communication 多址干扰Multiple Access Interference 人机交互man machine interface 交互式会话Conversational interaction