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OPA847跨阻放大如何防止过大脉冲信号损坏期器件

Other Parts Discussed in Thread: OPA847

如图所示,在使用OPA847进行跨阻放大时,由于光纤接头会有反射,导致反射处APD会产生大电流从而产生一个远大于实际信号的脉冲信号,目前这个放大倍数下我的有用信号还比较小,还需要增加放大倍数或者后级接放大对信号进行放大,但是反射信号太大,直接放大信号会导致运放饱和信号变形,同时脉冲信号过大也增加了运放损坏的机率。限制带宽的方式也不行,因为信号带宽本身不低。请问各位前辈有什么办法抑制这种信号,或者改善这种信号带来的影响(光纤接头没法去掉)