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OPA627跨导放大自激?

Other Parts Discussed in Thread: OPA627

OPA627如图所示接成跨导放大器,反馈电阻是200K时正常,反馈电阻换成2M后,运放输出噪声突然变大,感觉是自激震荡了,

请问为什么会这样?有无解决方法?

x 出现错误。请重试或与管理员联系。