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边带滤波



谁给讲一下R2和C3的作用?在读论文时,看到作者说它们起到边带滤波的作用,在百度上也没搜到结果。之前,碰到过类似的问题,学长说因为运放的输出电阻很小,需要加个小电阻,大约50欧,至于那个电容,起到使信号平滑的作用,但是我没太明白。请大神赐教,或者请大神想向我推荐一下,我该看哪些知识点,来解决这个问题