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ADS1292,50Hz滤波问题

Other Parts Discussed in Thread: ADS1292

ADS1292采集到的信号的波形如下:

但是50Hz的干扰很严重,已经加了右腿驱动了,还能看到明显的干扰。

请问如何把这个干扰滤除?

是需要采集之后做数字滤波吗?有没有数字滤波的算法供参考一下?