电路如图所示
U1B部分做电压跟随器
如图,当U1.5输入约30mV时,输出理论上应在30mV左右,图上PR5为仿真输出
但实际电路PR5为0.54V,不知为何?
按器件手册,运放输入可以到V- - 0.3V,电路里V-接地,那么-0.3V以上应该都可以正常输出
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