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关于opa2277做加法电路的问题

Other Parts Discussed in Thread: OPA2277

opa2277做加法电路的时候,正电源的电压从5V被拉低到1.3V,并且正极电流达到2点多安培,负电源的电压还是保持在5V,但是没有工作电流。

电路图是这样的