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什么是三极管放大电路的饱和失真和截止失真?如何避免?

问答题
2022-03-01 10:41
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正确答案

当输入交流信号较大,因静态工作点设置过高,信号正半周使器件进入饱和区而造成的波形失真,称为饱和失真;反之因静态工作点设置过低,信号负半周使器件进入截止区而造成的波形失真,称为截止失真。这两种失真都是因为器件的非线性特性造成的,所以统称为非线性失真。
为了避免出现饱和失真和截止失真,可以调节电阻RB、RC或电源UCC,使静态工作点沿负载线移动或改变负载线的斜率,而使静态工作点移到合适的位置。


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