大学MOOC 电子学(北京交通大学)1205722808 最新慕课完整章节测试答案
1 电子学基础
第1单元测验
1、单选题：
What is the input resistance between terminals B and G in the circuit shown below? (The voltage vx is a test voltage with the input resistance Rin defined as Rin ≡ vx / ix.)
选项：
A: 
B: 
C: 
D: 
答案: 【 】
2、填空题：
A signal source has an open-circuit voltage of 10mV and a short-circuit current of 10μA. The source resistance is kΩ
答案: 【 1】
3、填空题：
An amplifier has a voltage gain of 100 V/V and a current gain of 1000 A/A. The power gain in decibels is dB
答案: 【 50】
4、填空题：
An amplifier operating from a single 15-V supply provides a 12-V peak-to-peak sine-wave signal to a 1-kΩ load and draws negligible input current from the signal source. The dc current drawn from the 15-V supply is 8 mA. The power dissipated in the amplifier is mW.
答案: 【 102】
5、填空题：
The output voltage of a voltage amplifier has been found to decrease by 20% when a load resistance of 1 kΩ is connected. The value of the amplifier output resistance is Ω
答案: 【 250】
2 运算放大器
第2单元测验
1、单选题：
The circuit shown in Fig. (a) can be used to implement a transresistance amplifier. Find the value of the input resistance 
, the transresistance 
, and the output resistance 
of the transresistance amplifier. If the signal source shown in Fig. (b) is connected to the input of the transresistance amplifier, find its output voltage.
选项：
A: 
B: 
C: 
D: 
答案: 【 】
2、单选题：
Use the idea presented in the figure below to design a weighted summer that provides
Which choice is correct?
选项：
A: 
B: 
C: 
D: 
答案: 【 】
3、单选题：
What is the output voltage of the following circuit?
选项：
A: 
B: 
C: 
D: 
答案: 【 】
4、单选题：
Assuming ideal op amps, what is the voltage gain and the input resistance?
选项：
A: -10V/V, 10 kΩ
B: 10V/V, 10 kΩ
C: -10V/V, 0
D: 10V/V, 100 kΩ
答案: 【 -10V/V, 10 kΩ】
5、单选题：
The expression for the voltage gain of the following circuit is .
选项：
A: 
B: 
C: 
D: 
答案: 【 】
6、填空题：
Consider an inverting amplifier with a nominal gain of 1000 constructed from an op amp with an input offset voltage of 3 mV and with output saturation levels of ±10 V. The peak sine-wave input signal that can be applied without output clipping is mV.(approximately)
答案: 【 7】
7、填空题：
Consider an inverting amplifier circuit designed using an op amp and two