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OPA2690 做跨导放大光电二极管弱电流, 下图的电路结构
发现在光电流频率增加后，其输出信号基线会向上漂移，如下图，原本基线在下面绿线上，光电流频率增加，基线上漂
是啊, 这个基线来自于信号的低通滤波.
如果脉冲过多, 就会影响到平均值, 从而影响基线信号
能否再解释具体点，有怎么能把影响消除到最小呢
