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放大电路的信号源内电阻RS和输入电阻Ri的大小对电压放大倍数有何影响？
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放大电路的信号源内电阻RS和输入电阻Ri的大小对电压放大倍数有何影响？
时间：2022-01-02 09:56
关键词：
国家开放大学(电工电子技术)
CMS专题
专科
机械制造与自动化
答案解析
由于信号源内阻与输入电阻的分压作用的影响，放大电路的信号源内电阻RS越高，电路的电压放大倍数越小；输入电阻Ri越高，电路的电压放大倍数越大。
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