您好:
我使用的电路原理图如下:
其中C34加大到100n,并且C33加大到2.2u或更大,谐振波形的幅值会减小,但无法消除,C34值越小,谐振波形的幅值越大,其中C34为100p,C33为0.1u时谐振波形的幅值可到2V多,哪位帮忙消除谐振,谢谢!
又:U2为 OPA348
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我认为是C33和R27在环路上引入过多相移造成自激,要克服估计要改变电路。
比较简单的就是把积分电路放在正向输入端