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仪表运放INA128U输出纹波较大

Other Parts Discussed in Thread: INA128

仪表运放INA128的输入信号直接由电池分压输入(十几毫伏)。放大倍数为200倍,为什么输出信号有纹波干扰,且干扰信号最大偏差能达到几十毫伏。这个纹波干扰信号有什么好的方法消除?