2021 通信电路与系统(杭州电子科技大学)1463240444 最新满分章节测试答案

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本课程起止时间为:2021-03-01到2021-07-04
本篇答案更新状态:已完结

【作业】Chapter-1 Introduction to Basic Knowledge of Communication Electronics Circuits 3月11日 Q&A

1、 问题:针对本次课学习内容，提出你的问题和思考。可以包括但不局限于以下几种：难以理解的知识点。 希望了解的知识点。上次课疏忽的知识点。
评分规则: 【 在认真学习本次课视频的基础上，提出自己的问题。问题可以包括但不局限于以下几种：难以理解的知识点。 希望了解的知识点。上次课疏忽的知识点。
】

Chapter-1 Introduction to Basic Knowledge of Communication Electronics Circuits 03.04 随堂测试

1、 问题:Which of the following circuits is not part of super heterodyne receiver?
选项：
A:Local oscillator
B:Mixer
C:Intermediate frequency amplifier
D:Modulator
答案: 【Modulator】

2、 问题:What is the core of the transmitter？
选项：
A:Mixer
B:Modulator
C:Oscillator
D:Amplifier
答案: 【Modulator】

3、 问题:In the wireless communication system , the transmitter and receiver are both have oscillator circuits.
选项：
A:正确
B:错误
答案: 【正确】

Chapter-1 Introduction to Basic Knowledge of Communication Electronics Circuits 3月11日课前练习

1、 问题:FM radio signal belongs to which wave type?
选项：
A:VLF
B:VHF
C:UHF
D:HF
答案: 【VHF】

2、 问题:FM radio signal belongs to which wave type?
选项：
A:VLF
B:VHF
C:UHF
D:HF
答案: 【VHF】

3、 问题:In the wireless communication system , the transmitter and receiver are both have oscillator circuits.
选项：
A:正确
B:错误
答案: 【正确】

4、 问题:The frequency of High frequency signal only from 3- 30MHz？
选项：
A:正确
B:错误
答案: 【错误】

5、 问题:In the wireless communication system , the transmitter and receiver are both have oscillator circuits.
选项：
A:正确
B:错误
答案: 【正确】

6、 问题:LC series resonant circuit and LC parallel resonant circuit both have frequency-selective function.
选项：
A:正确
B:错误
答案: 【正确】

7、 问题:The resonant frequency will be changed by adjusting the value of L and C.
选项：
A:正确
B:错误
答案: 【正确】

8、 问题:Quality factor Q reflects the frequency-selective characteristic of the circuit, which is also related with the bandwidth.
选项：
A:正确
B:错误
答案: 【正确】

9、 问题:When the operating frequency is greater than the resonant frequency, the LC parallel resonant circuit and the LC series resonant circuit are both capacitive.
选项：
A:正确
B:错误
答案: 【错误】

Chapter-1 Introduction to Basic Knowledge of Communication Electronics Circuits 3月11日随堂测试

1、 问题:Which of the following circuits is not part of super heterodyne receiver?
选项：
A:Local oscillator
B:Mixer
C:Intermediate frequency amplifier
D:Modulator
答案: 【Modulator】

2、 问题:When the resistive load increases, the selectivity of LC parallel resonant circuit will be improved, but（ ）will be decreased.
选项：
A:Quality factor Q
B:Resonant frequency f0
C:Rectangular coefficient K0.1
D:Pass band B0.7
答案: 【Pass band B0.7】

3、 问题:In the wireless communication system , the transmitter and receiver are both have oscillator circuits.
选项：
A:正确
B:错误
答案: 【正确】

4、 问题:The resonant frequency will be changed by adjusting the value of L and C.
选项：
A:正确
B:错误
答案: 【正确】

5、 问题:Quality factor Q reflects the frequency-selective characteristic of the circuit, which is also related with the bandwidth.
选项：
A:正确
B:错误
答案: 【正确】

6、 问题:When the operating frequency is greater than the resonant frequency, the LC parallel resonant circuit and the LC series resonant circuit are both capacitive.
选项：
A:正确
B:错误
答案: 【错误】

7、 问题:LC series resonant circuit and LC parallel resonant circuit both have frequency-selective function.
选项：
A:正确
B:错误
答案: 【正确】

8、 问题:The larger the rectangular coefficient, the better the frequency-selective performance.
选项：
A:正确
B:错误
答案: 【错误】

Chapter-1 Introduction to Basic Knowledge of Communication Electronics Circuits 3月18日课前练习

1、 问题:Which of the following impedance conversion circuits can both increase and decrease the load?
选项：
A:Auto-transformer
B:Transformer
C:Capacitor divider
D:All of above
答案: 【All of above】

2、 问题:Can both the signal source and the load be partially access to the LC circuit?
选项：
A:Yes.
B:No.
C:Only the load can.
D:Only the signal source can.
答案: 【Yes.】

3、 问题:What will happen when the load is connected directly to the LC parallel resonant loop?
选项：
A:Impedance unmatched
B:Lower transmission power
C:Lower transmitting efficiency
D:Lower transmitting sensitivity
答案: 【Impedance unmatched;
Lower transmission power;
Lower transmitting efficiency;
Lower transmitting sensitivity】

4、 问题:Why the LC impedance transformation network will be used in the circuit?
选项：
A:Reduce the influence on quality factor Q
B:Improving the selectivity
C:Increase operation frequency
D:Simplify circuit structure
答案: 【Reduce the influence on quality factor Q;
Improving the selectivity】

5、 问题:When the operating frequency is greater than the resonant frequency, the LC parallel resonant circuit and the LC series resonant circuit are both capacitive.
选项：