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求推荐高速电流检测方案

有一个疑问,现有的电流检测芯片的带宽为什么都那么小呢,难道只考虑直流电流检测,不考虑交流电流检测的需求吗?

球推荐一个能检测1MHz以上信号的电流检测方案,也就是检测IC的带宽至少要5MHz。 

谢谢!