在使用芯片手册中的AGC环路时,我需要在低频300~5K是完成AGC,但是发现输出波形顶部失真严重,然后在opa820反馈支路中增加电容容值在并上电阻,发现波形还好,但是AGC的效果已经消失,输入幅值变化,输出会有变化,请问是什么原因
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