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噪声消除

Other Parts Discussed in Thread: TLE2027

通过运放输出的直流有噪声,加了一个30HZ的低通滤波器后还是有峰峰值为100mv的噪声,这是器件本身带来的噪声,还是其他的原因?还有像这样的噪声一般怎么消除?