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我设计的5M低通有源滤波器，请问电流反馈运放可以设计有源滤波器吗？
CFA是可以用来设计滤波器的，只是要注意支持CFA的滤波器结构比较少，Sallen-Key的就可以。其实5M的用VFA做就可以了
5M低通有源滤波器可以直接使用VFA做
例如OPA2690单片即可做4阶 足矣满足要求
