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THS4303做光电放大器问题

Other Parts Discussed in Thread: THS4303, THS4121

用THS4303做主放大器芯片,进行零差探测设计,电路如图:

但是在给两个PD加一定功率的连续光后出现振荡,振荡频率在570MHz,请问这是什么原因?

下图是频谱图,570M地方有很明显的振荡