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按照官方手册连的电路，但是复端电压么有达到-5v,为-4.3v但是输出的信号总是有负偏置，后来改成了电压跟随器，但是还是有负偏置，前面加了102的电容也有，而且是芯片上电就会有偏置。看输入波形。发现一上电就会偏置，请问该怎么改电路。
可能是运放的失调引起的, 可以考虑增加一个反偏置来抵消掉它
