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阻抗匹配问题

Other Parts Discussed in Thread: OPA861, OPA847

下面是我连的一个电路,先电压放大,再电压转电流,OPA847与OPA861之间没有阻抗匹配,实际做成电路会有问题吗?如果要阻抗匹配,是不是B端之间并联一个50欧电阻,但是这样会分压,电流达不到我的要求,有其他实现阻抗匹配的方法吗?