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TLV320AIC3101EVM-K: 开启Programmable Filters有问题

Part Number: TLV320AIC3101EVM-K

你好:

如题,我们按照SPEC的指引,1)先在HP Filter处分别输入N0、N1、D1的值,2)点击Download Coefficients,3)enable Left ADC

我们做到第2)步的时候,发现噪音变小了(不知道是不是高通滤波生效了),但奇怪的是,我们做完第3)步噪音反而变大了。

请帮忙解答一下,谢谢