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求教opa129 放大ph电极信号时,有50hz干扰,

Other Parts Discussed in Thread: INA333

有用过opa129的高手吗,

用opa129 放大ph电极信号时,有50hz干扰,先后换了两种电源开关电源和线性电源供电正负5V,但输出还是有干扰。怎解决,谢谢。

顺便问下opa129能单电源供电吗?最好有参考图,谢谢诶。