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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 power consumption flip flop low pass micron assembly language transient response quality factor power supply 10.load current 11. flux 12. dielectric 13. decibel 14. duty cycle 15. antenna 16. simulation 17. order of magnitude 18. buffer 19. full-custom 20. synthesis

半导体 功耗 触发器 低通 微米 汇编语言 瞬态响应 品质因子 电源 负载电流 通量 介电的 分贝 占空比 天线 模拟 数量级 缓冲器 全定制 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 2.晶体管 3.频率 4.可靠性 5.矢量 6.复位 7.乘法

voltage source transistor frequency reliability vector reset multiplication
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8.振荡器 9.锁存器 10.滤波器 11.电感 12.电容 13.寄存器 14.负反馈 15.串联 16.混叠 17.周期 18.原理图 19.整流器 20.总线

oscillator latch filter inductance capacitance register negative feedback series aliasing period schematic rectifier 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,
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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。
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5. As in the first-order case, the second-order low-pass transfer function tends to zero as frequency tends to infinity. 同一阶情况一样,二阶低通传输函数随着频率趋于无穷而趋于零。 6. Signal integrity is defined by loss of quality of the input signal. Ideally, the signal at the output of an interconnect should be equal in all characteristics with the signal at the input of the interconnect. In reality, signal degradation occurs. 信号完整性以输入信号质量的损失为定义。理想情况下,互连线的输出端的信号 应该与互连线输入端的信号在所有的特性上都相同。而实际上,会发生信号降级 的情况。 7. During the “on” period, energy is being stored within the core material of the inductor in the form of flux. There is sufficient energy stored to carry the requirements of the load during the next off period. 在“连通”周期,能量以磁通的形式存储在电感器的铁芯材料中。有足够的能量 存储下来,用于在下一个“断开”周期中满足负载的需要。 8. Tolerance/Accuracy/Precision is a measure of how close the part operates to the specified (nominal) frequency, typically referenced at ambient temperature (25oC +/5oC). 容差/精度测量的是器件的工作频率和标称频率(一般是指在常温下)的接近程 度。
9. Beta is approximately constant for an individual transistor, although it does vary with

temperature and slightly with the collector current

对于单个晶体管, beta 近似为常数, 尽管 beta 的确会轻微的随着温度和集电极电 流大小发生变化。

10. 1906: First electronic triode vacuum tube is built by American electrical engineer Lee De Forest, allowing signals to be controlled and amplified. Technology of electronics is born.
1906 年,第一支电子真空三极管由美国电气工程师 Lee De Forest 发明,使得信号可以被控 制和放大。电子学技术由此诞生。

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