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LM2904B-Q1: 运放做差分放大输出电压异常跌落

Part Number: LM2904B-Q1
Other Parts Discussed in Thread: LM2904

外部传感器为电流输入信号,R1501作为采样电阻,将差分信号输入给LM2904进行放大,当VSUPPLY电压从6V~20V变化时,LM2904输出电压在某些电压下会突然出现电压跌落现象,甚至跌倒了负电压,如蓝色波形,跌落时长200ns~700ns。从波形看是单次的,不像是振荡,尝试过增加补偿电容,没有影响。请高手指导如何消除这个电压跌落。谢谢。