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模拟电路中用瞬时极性法判断负反馈的过程

2025-03-16 06:22:28

推荐回答（2个）

回答1：

VT2基极电位升高是针对环路反馈信号而言的。无环路反馈时，Vb1加上正极性信号，使Ic1增大，Rc1压降增大-Vc1下降即Vb2下降，致Ic2增大-Ic3增大-VRe3升高，通过Rf使VRe1升高，VRe1升高使Ic1减小，于是Vc1回升，即VT2基极电位回升（升高）。

回答2：

你是问负反馈判断的，怎么绕到集电极电压升高了，瞬时极性法判断负反馈不用管这个、

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