电子信息专业英语试卷A

一、根据英文单词写出中文词义（每题1分共20分）semiconductor 半导体

power consumption 功耗

flip flop 触发器

low pass 低通

micron 微米

assembly language 汇编语言

transient response 瞬态响应

quality factor 品质因子

power supply 电源

10．load current 负载电流

11. flux 通量

12. dielectric 介电的

13. decibel 分贝

14. duty cycle 占空比

15. antenna 天线

16. simulation 模拟

17. order of magnitude 数量级

18. buffer 缓冲器

19. full-custom 全定制

20. synthesis 综合

二、根据中文词义写出英文单词（每题1分共20分）

1. 电压源voltage source 2．晶体管transistor 3．频率frequency 4．可靠性reliability 5．矢量vector

6．复位reset

7．乘法multiplication

8．振荡器oscillator

9．锁存器latch

10．滤波器filter

11．电感inductance

12．电容capacitance

13．寄存器register

14．负反馈negative feedback

15．串联series

16．混叠aliasing

17．周期period

18．原理图schematic

19．整流器rectifier

20．总线bus

三、完形填空（共20分）

What is a filter? A filter is a device that passes electric signals __at_ certain frequencies or frequency ranges __while_ preventing the passage of others.

Filter circuits are used ___in____ a wide variety of applications. In the filed of telecommunication (在电信领域),band-pass filters are used in the audio frequency range (0kHz to 20kHz) for __modem and speech processing__ (调制解调器和语音处理).High-frequency band-pass filters(several hundred MHz) are used for ____channel selection_ (信道选择)in telephone central offices. Data acquisition systems usually require _anti-aliasing low-pass filters__（抗混叠低通滤波器) as well as low-pass noise filters in their preceding __signal conditioning_ (信号调理)stages. System power supplies often use band-rejection filters to suppress the 60-Hz frequency and high frequency transients. In addition, there are filters that do not filter_ (滤除)any frequencies of a complex input signal, but just add a ___linear phase shift__ (线性相移)to each frequency component，thus contributing a constant __time delay__（时延）.These are called ___all-pass filter__ (全通滤波器).

At high frequencies (>1 MHz), all of these filters usually consist __of_ passive components __such as__ inductors (L), resistors (R), and capacitors(C). They are then __called______ LRC filters. In the low frequency range (1 Hz to 1 MHz), however,

the inductor value becomes very large and the inductor itself gets quite bulky, ___making__ economical production difficult. In these _cases_____, _active filters_ (有源滤波器) becomes important. Active filters are circuits that use _operational amplifier__ (运算放大器) as the active device ___in__ combination with some resistors and capacitors to provide an LRC-like filter performance at low frequency.

四. 翻译（每题5分共40分）

1．Compared to the vacuum tube, transistors were much smaller, faster, and cheaper to manufacture. They were also far more reliable and used much less power.

与真空管相比，晶体管小得多，快得多，成本低得多。另外它们的可靠性也好得多，功耗也小得多。

2.An SRAM is an array of addressable flip-flops. The array can be configured as

such that the data comes out in single bit, 4-bit, 8bit, and etc. format. SRAM is simple, fast and volatile just like the flip-flop, its basic memory cell.

静态随机存取存储器( SRAM)是一种可寻址的触发器阵列。该阵列可配置成1位、4位、8位等数据格式。它和它的基本存储单元触发器一样：结构简单、存取速度快、具有易失的特点。

2.The power gain in decibels is equal to 10 times the logarithm base 10 of the power

gain.

以分贝为单位的功率增益等于10乘以以10为基的功率增益的对数值。4．Since power is proportional to the square of the voltage, if the input signal is increased by a factor of two, the output signal is increased by a factor of four.

由于功率与电压平方成正比，因此如果输入型号增大至两倍，输出信号将增大至四倍。