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OPA1612 1.1倍同相放大,是否自激?

Other Parts Discussed in Thread: OPA1612

OPA1612设计一个同相放大做输入输出缓冲(正常5MHz,200mV输入),电路如图所示

输入P3或P4一旦接信号发生器(即使无输入信号),OPA1612输出(PreAmp01或PreAmp02)都有15MHz左右,2V多的正弦信号。如下图

求解决办法和分析原因。