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光电二极管放大电路运放电源设计问题

Other Parts Discussed in Thread: LMC7660

  光电二极管前置放大电路,电流比较小,na级别的,电源如图,现在运放的电源是用一个10v的单电源,然后一个5v的基准电压加一个运放跟随器做参考点。不知这样设计是否可行,还是用一个﹢5v电源用一个lmc7660转成负电源,这样好呢