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opa549输出保护,求助

Other Parts Discussed in Thread: OPA549

一个最基本的比例放大电路,当输入的直流信号小的时候,输出正常,

但当输入信号超过2v后,输出电压开始周期性震荡,如图,

1通道是输入信号,2通道是输出电压。

原理图