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OPA842正向放大电路,当输入频率大于MHZ时增益增大

Other Parts Discussed in Thread: OPA842, THS3201

用OPA842芯片搭了如下电路,正向放大器, 放大倍数为2倍,但是当输入频率增大为1MHz以上时,放大倍数大于2,想询问一下解决方法。

然后试图通过在R1两端并一个电容解决,但始终调不好?

求大神提供解决方法,万分感谢。