专业英语复习题-0519

专业英语复习题

一、Select and fill in the blank according to professional knowledge （The big topic 5 items,each item3,total of15 points）.根据专业知识选择填空（本大题共5个小题，每题3分，共15分）

1、One of the summing constraints is_____ either input terminal of the ideal operational amplifier.

2、When negative feedback is applied around the ideal operational amplifier, ______apporaches zero.

3、The gain of _____ with the feedback loop closed is unity gain.

4、Assume the output impedance of ideal op amp to be zero, then it can be supply _____ to the load being driven.

5、When a zero signal appera between the invertin and non-inverting inputs, the amplifier output______.

6、The input impedance of the ideal operational amplifier is asummed ______.

7、The closed loop gain of ____ can be any desired value above unity.

8、The output voltage polarity of _____is opposite with the input voltage.

9、The frequency response of an ideal operational amplifier will be flat and _______.

10、No current flows into ______ of the ideal op amp.

1、the differential input voltage

2、 no current flows into

3、will be zero

4、the voltage following

5、as much current as necessary

6、inverting amplifier

7、to be infinite

8、non_inverting amplifier

9、either input terminal10、infinite bandwidth

二、Grammatical function analysize for the underlined parts(The big topic5 items,each item3,total of15 points).

二、进行划线部分的语法功能分析（本大题共5小题，每题3分，共15分）

1、These two statements will be used repeatedly in the analysis of the fedback circuits to be presented in the rest of this section.

2、Since no current flows at the non-inverting input, the input impedance of the voltage follower is infinite.

3、Its utility is reflected in the variety of intuitive devices that are commonly used to simplity its analysis.

4、Such circuits are widely used in control and instrumentation where non-inverting gain is required.

5、the summing point, the inverting input, will conduct no current to the amplifier.

6、The voltage appearing between the inverting and noninverting inputs approaches zero when the feedback loop is closed.

7、The feedback resistor is of partical importance if the op amp selected is a current-feedback type.

8、Unity gain circuit are used as electrical buffers to isolate circuit or devices from one another.

9、The stability of current-feedback op amps is dependent entirely on the value of feeback resistor selected.

10、Such circuits are widely used in control and instrumentation where non-inverting gain is required.

三、Systax analysize and mark its function with following sysbols: Subject: ____; Predicate:; Object:; Attribute：( ); Adverbial:[ ] (The big topic5 items,each item6,total of30 points).

三、句法分析，并用下列符号表示：主语____；谓语：；宾语：；定语：（）；状语：[ ]。

1、Input impedance to this circuit is not infinite as in the two previous circuits, the inverting input is at ground potential so the driving source effectively “see” Ri as the input impedance.

2、This property is to become an important tools for circuit analysis and design, for it gives us an inherent restraint on our circuit－a place begin analysis.

3、In the case of the ideal operational amplifier, circuit analysis was simplified by the ideal summing point restraints of zero voltage and zero current at the inverting input.

4、The stability of current-feedback op amps is dependent entirely on