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OPA322: 光电二极管放大器电路

Part Number: OPA322

为什么所有的光电二极管放大器中的光电二极管都接在运放的负极,都是反向放大;为什么没有接在正极,做同向放大呢?如下图我自己画的那个同向反向放大电路可以用吗?... ...