【单选题】
图示射极输出单管放大电路,已知RB=200kΩ、RL=10kΩ,晶体三极管β=60,交流输入电阻γbe≈1kΩ。求所示单管放大电路的电压放大倍数
![](https://www.netkao.com/upload/image/zidongup/20190102/20190102115753_2645.jpg)
及放大电路的输入电阻R
i分别为( )。
![](https://www.netkao.com/upload/image/zidongup/20190102/20190102115753_3269.jpg)
A.
![](https://www.netkao.com/upload/image/zidongup/20190102/20190102115753_4361.jpg)
≈0,R
i≈1kΩ
B.
![](https://www.netkao.com/upload/image/zidongup/20190102/20190102115753_4829.jpg)
≈1,R
i≈68kΩ
C.
![](https://www.netkao.com/upload/image/zidongup/20190102/20190102115753_5297.jpg)
≈60,R
i≈100kΩ
D.
![](https://www.netkao.com/upload/image/zidongup/20190102/20190102115753_5921.jpg)
≈100,R
i≈200kΩ
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8%的考友选择了A选项
56%的考友选择了B选项
5%的考友选择了C选项
31%的考友选择了D选项