填空题
1. Transistors have many advantages electron tubes.
2. We have to find out the current and the voltage the resistor.
3.This circuit is and this circuit is
4. To make sure aliasing will not occur, sampling is always by low pass filtering.
为了保证不会出现混叠，在采样之前总是要进行低通滤波。Preceded 用这种方法所导出的数学模型证明是比较简单的, 并且具有实用意义, 从而为进行最佳设计创造了良好的条件。proves
5.The mathematical model derived by this method （证明）to be simple and of practical significance, thus creating good conditions for making optimal designs.
6. A transistor is allowed to operate cutoff or saturation, but not in its active region.
at in
(2) In the la tter the base is 10 (ten), and ten numerals, 0, 1, 2, 3, …, 9, are required to express
.(an arbitrary number)
(3) The numerals 0 and 1 have the same meaning as in . (the decimal system)
(4) In particular, the 0 state need not represent (a zero voltage level)(although in some
systems it might).
(5) To summarize, A/D comprises , ,
and .(anti-aliasing,sampling,quantization,digitization)
二Translating from English into Chinese
1.The reduction in power dissipation is particularly important where
a complex circuit is to be concentrated into a small space. The problem of extracting the heat generated in the circuit may then be a difficult one.
Miniaturization means the reduction in size of components and circuits for increasing package
density and reducing power dissipation and signal propagation delays.
微型化是指减少元件和电路的几何尺寸, 从而增加封装密度、降低功耗、减少信号传播延迟。
2.Maintenance is simplified because if a component of the IC fails the complete IC is usually replaced
3. Integrated circuits are also classified according to their function s.
4. It is assumed that the reader has a general knowledge of circuit theory.
5.A major advantage of this device is that it operates continuously.
6.Copy standard 8051 start up code to project folder and add this file to project
7.The results obtained demonstrate that the above equation holds for all cases. 所得结果表明，上述公式适用于各种情况。
8.Many conditions need to be considered for developing this system.
9.The cost of computers is reduced by 50%.
To be a true professional requires lifelong learning.
10. The new device is designed as an alternative for the old one.
11.For all its great size, the machine moves noiselessly.
12. The circuit, which it contains some nonlinear devices, can be considered linear.
13.The main device failure mode is secondary breakdown.
14.It is 30 cubic meters in volume.
15. As rubber prevents electricity from passing through it, it is used as insulating material.
16. Integrated circuit are more of a science, than of a technology.
17.Multimedia is one of the most innovative ways of using a telecommunications network to achieve
effective communications.
•多媒体是使用电子通信网络实现有效通信的最具创新的方式之一。
18.An NPN transistor is shown in Figure 3.1 with a load resistor (R L=10 kΩ) in series with the collector
terminal.
19. A General Purpose VLSI Frequency Synthesis System
20.LCD System Developing and Testing Based on MCU
本文提出了解决这一问题的新方法, 这种方法简单而切实可行。
21. A new method to solve(for solving/of solving)this problem is presented, which is
simple and practicable.
22.The production of various ICs have been increased four times as against 1995.
译文1: 各种集成电路的产量增加到1995年的4倍。
译文2: 各种集成电路的产量较1995年增加了3倍。
23.It is also seen from the figure that resistors R B and R L are in parallel with the circuit input and output
terminals, respectively.
•从图中还可以看出电阻R B和R L分别与电路的输入与输出端并联。
24. When assessing the AC performance of the circuit; V CC can be treated as a short circuit.
25. For example, if a 2 volts reference is applied, a differential voltage of only 200 μV is needed to swing the output from negative saturation to positive saturation.
26. In the binary system of representation the base is 2, and only two numerals 0 and 1 are required to represent a number.
Since 25<36<26, then a minimum of 6 bits per bite are required in order to accommodate all the 36 alphanumeric characters.
27. On the other hand, a DC negative-logic system, as in Figure 3.6(b), is one which designates the more
negative voltage state of the bit as the 1 level and the more positive as the 0 level.
另一方面, 如图3.6(b)所示, 把比特的较低的电压状态记为1电平, 较高的电压状态记为0电平, 这样的系统称为直流负逻辑系统。
28.Integrated circuits are also classified according to their functions. Digital or logical IC are used as switches, they are either on or off. In computers the on and off states
correspond to 0 or 1.Other IC is called linear or analog IC.
也可根据其功能不同对集成电路进行分类。数字IC(也称为逻辑IC)通常用作开关, 表示接通或关断。在计算机中, 接通和关断状态分别对应“0”或“1”。另一种IC被称为线性或
模拟IC。
29.Most electronic circuits are composed of active devices, e.g. transistors and diodes, together with resistors (for bias, collector load, impedance transformation, etc.) and
