[精品]专业英语模拟试题含答案.doc

专业英语模拟样题

缩略语翻译

1.i.e.指数误差

2.etc.等等

3.e. g.举例来说

4.RF无线电频率

5.IF中频

6.AGC自动增益控制

7.CB段路开关

8.CW连续波

9.AFC自动频率控制

https://www.360docs.net/doc/fb7180724.html,D电荷耦合器件

专业词汇翻译

1.short c i rcu i t 短路；漏电

2.close ci rcui t 闭合电路

3.phase-locked loop 锁相回路

4.two-1erm i na I dev i ce 二端器件

5.speech recogn i t i on 语音辨识

6.fu I I-duplex全双工传输

7.edge frequency截止频率；边界频率

8.power consumpti on 能量功耗

9.flip-flop 触发器

10.negative feedback 负反馈

11?整句翻译

1.The second area empIoys techniques that are quite different from those of convent i ona I hardware des i gn and a I so requ i re a substarit i a I i nvestment in specia I test

equipment for eff icient deveIopment and debugging. 第二个方面拥有技术，完全有别于

常规硬件设计，也都需要大量投资的特殊的测试仪器高效发展和调试。

2.Digi ta I des ign i s based on the simple concept of yes or no, true or fa I se, high or low, and so on.

数字的设计基于概念的简单阐述是或否，真与假、高或低的,等等。

3.W ith each logi c eI ement there i s a "truth table” that exp I a ins how the un i t work. These tables are genera I ly pos i tive logic. Th i s means that the func tion i s descr i bed for i npu t signa Is that are 1' s. Nega tive logic i s when the function i s descr i bed in terms of i nput zeros.

每个逻辑元素有一个“真值表”，解释如何单位工作。这些桌子一般积极的逻辑。这意味着功能描述的输入信号是1。消极的逻辑是当作用将从输入为零。

4.An important d i fference should be noted at th i s time between d i gital and ana I og components. There i s very I i tt I e need for the c i rcu i t des i gner to know how a d i g ital func tion is accomp I i shed. If the job i s we I I done, the impor tarit proper ties

such as propaga tion delay, power consump ti on, number of Ieads, and the need for supporting moduIes wi I I be favorabIe. 一个重要的差别应该注意的是在这之间的时间

数字和模拟部件。很少电路设计者需要知道一个数字功能完成。如果这个工作做

得很不错，重要的性质，如传输延迟、能耗、数量的商机，需要支持模型会有

利。

5.The r i se and fa I I t i mes I im it the response by not reach i ng the nex t logic I eve

I in time t o be recogn i zed .The rise and fa I I ti mes can be somewha t controlIed

through good Iayout to reduce capaci tance and i nductance, by I imiting the number of

stages that are dr i ven, and by the occas i onal use of a puI I-up res i stor i n the

output c i rcu its.

限制的上升和下降的反应没有达到下一个逻辑电平及时被认出来上升和下降可能

有点控制,通过良好的布局方式，减少电容和电感的数量，以限制驱动阶段，偶尔的使用拉电阻器在输出电路。

6.The four fam i I i es of dev i ces can be i nterconnected i f des i red, but the i r i npu t current requ i rements and output dr i ve capab i Iities must be adhere to. The output of each fami ly can sink (Iow) 10 standard Ioads of its own fami ly and source (h i gh) 10 to

20 standard Ioads of its own fami ly. The driving capabi I ity is cal led u fanout"?

四个家庭互连设备需要,但是他们的输入电流输出驱动能力的要求，必须坚持。每个家庭的产量可能沉了(低)10个标准大量的自己的家庭和源(高)10到20标准荷载的自己的家庭。驾驶能力称为“fanout”。

7.No d i scuss i on of bounded med i a wouId be comp Iete without mentioning opti ca I f i bres ? Th i s med i um uses opti ca I wavegu i des in the form of glass f i bres wh i ch carry moduI ated Ii ght s i gnals? Schemes of th i s t ype perm it vast bandwi dths and, as they become more common, are I i ke I y to have an importarit effect on speech secur i ty. Among other poss ibIe advantages, thei r use wi I I certainly make the actual interception

of the signals cons i derabIy harder?

有界讨论媒体将会完成多个光导纤维不谈。光波导中使用的形式，将玻璃纤维光路差分调制信号。这种类型的方案许可证，当他们在巨大的带宽变得越来越普遍, 都可能有重要影响言论保障。在其他可能存在的好处，它们的用途一定会让实际拦截的信号相当困难。

8.I n a rad i o net work both transm i t and rece i ve antennae can be d i rec t i ona I or omn i -d i rect i onaI? An omn i-d i rect i onaI transmitting antennae rad i ates energy more or I ess uniformly i n a I I d i rections.

在无线电网络都可以发射和接收天线定向天线和全向。全方位发射天线或多或少充满能量向各个方向均匀。

9.Most scramblers are retrofitted to ex i sting teIecommuni cations system wh i ch are Ii keIy to operate in narrow bandwi dths? But, as we shaI I see I ater, most soph i sticated forms of scrambI i ng i ncrease the s i gnaI bandwidth and so, s i nee the ex i st ing bandwi dth i s I ikely to be narrow, the user may end up with a system in which the scrambled speech occupies a larger bandwidth than that supported by the rest of the system. 大多数scramblers是改造现有通讯系统可能会有更多的操作在狭窄的带宽。但是,

正如我们后来看到的，最尖端的形式的抗癌等信号带宽增加，因为现有的带宽可

能窄，用户可能最终与系统，在煎演讲，占据了很大的带宽的其他人支持系统。10.In genera I, however, an a I y t i c formu I as do not ex i s t for the des i ge of

either ana Iog or d i gital fi Iters to match arb i trary frequency response specif ications or other types of specifications? In these more genera I cases, design procedures have been developed that are a Igor ithmic, genera I Iy re Iying on the use of a computer to solve sets of I i near or non I inear equations.

11 ?大体说来，解析公式不存在或者设计与模拟或数字滤波器任意频率响应规格

或其他类型的规格。在这些更一般的情况下，开发设计过程，依托，通常将使用计算机来解决套线性和非线性方程。