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单选题 The input impedance for a common-emitter configuration can be expressed as ( )
A. 
B. 
C. 
D. 
学科：模拟电子技术基础（西安邮电大学）
时间：2023-05-08 19:12:13
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题目1单选题
The input impedance for a common-emitter configuration can be expressed as ( )A. <img src="https://tihai-oss-cloud.itihey.com/img/e3852dc8c2235abd2492b705e7efba87.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/a6225d98a1a07c81b5cc5ae9b2a980a4.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/a323fb3f2311ef0d03370e7a224b27f8.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/a5c3da429d17ad113a9947adf0d849db.png">
题目2单选题
A(n) ( ) is added to the fixed-bias configuration to improve bias stabilityA. base voltageB. emitter resistorC. collector resistor
题目3单选题
A class A amplifier ( )A. conducts through 360° of the input waveformB. conducts through 180° of the input waveformC. conducts between 180° and 360° degrees of the input waveform, depending on the amount of dc biasD. conducts through less than 180° of the input waveform
题目4单选题
The current flows through the load resistor in this circuit during the ( ).<img src="https://tihai-oss-cloud.itihey.com/img/485139ff6dd16d5bbe4077689d57b634.png">A. positive half cycle of the input waveformB. negative half cycle of the input waveformC. entire input waveformD. The diode will block all current and there will be no current flowing through the load
题目5单选题
Calculate the base current for this emitter-stabilized bias circuit.( )<img src="https://tihai-oss-cloud.itihey.com/img/3110fe5ce63694b2345d2cb46cfda8c7.png">A. 89.0 mAB. 89.0 μAC. 0.119 mA
题目6单选题
If this circuit is to have an inverting voltage gain of 1, the ratio of <img src="https://tihai-oss-cloud.itihey.com/img/905d2d5be538dfc9e50a5d8e643212a0.png"> : <img src="https://tihai-oss-cloud.itihey.com/img/07d59bf0d70ee75f1c140b5ab5e22475.png"> should be ( ).<img src="https://tihai-oss-cloud.itihey.com/img/8d6bdf31219fb86c8fdc071b3f9b94fd.png">A. 1 : 1B. 2 : 1C. 1: 2D. Cannot be done in theory. It can be done in practice by making <img src="https://tihai-oss-cloud.itihey.com/img/291ac355ae25638ca6a22af7b597d84f.png"> much larger than <img src="https://tihai-oss-cloud.itihey.com/img/2efc7145528f8ea6b2270794461a2b63.png">
题目7单选题
When a BJT has its base-emitter junction reverse biased and its base-collector junction forward biased, it is biased in the ( )A. saturation regionB. active regionC. cutoff regionD. passive region
题目8单选题
Depending on the configuration of the amplifier, the magnitude of the no-load voltage gain for a single BJT transistor amplifier typically ranges from ( )A. 10 to about 10,000B. a hundred to about a millionC. just a little less than 1 to a few hundred
题目9单选题
This is a basic ( ) circuit. <img src="https://tihai-oss-cloud.itihey.com/img/fa4eaadfbe5e40b2ffcf845e7ccce614.png">A. differentiatorB. integratorC. two-input multiplierD. subtractor
题目10单选题
When tested with an ohmmeter, a diode should have a relatively small resistance for ( ) conditionA. the reverse-biasedB. the forward-biasedC. both reverse- and forward-biasedD. zero-biased
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