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LME49600评估板

Other Parts Discussed in Thread: OPA1612, LME49720

照着评估板上的原理图画的PCB,LME49720换成了OPA1612,去掉稳零放大器的输出1K电阻,输出稳定1mv内,接上的话,一声道输出有60mv,另外一个声道10mv,这是为什么?