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器件型号:TL431 TL431运算放大器的开环增益是多少、它就像单位增益差分放大器一样、可根据版本将反馈电压保持在~2.5V 或~1.24V、或者它是否具有非常高的增益、并以这种方式使两者保持不变 相同?
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