This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

输入端悬空

下图的电路中当正常输入信号时可以工作,不输入信号时R4悬空,此时电路变成正反馈,导致错误。有没有什么方法解决这个问题?智能使用同相的结构