想问下谁有做过精密全波整流，我用的是如图的典型的电路
二极管用1N4148，运放原先远的是TL082.但是带宽才100khz，如果我想提高带宽的话是需要用什么样的运放才好。![]()
并且仿真的时候，只要输入频率一高，输出波形就变成这样了![]()
这是什么原因？![]()
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