The filters circuits are devices that let the pass a frequency or band of frequencies while blocking others or vice versa, can modify both the amplitude and phase. The electronic filter can be analog or digital.
|Low-pass filter||Bandpass filter|
|Notch filter||Variable short-band filter|
|Bandpass filter with variable center frequency||Bandpass filter with varying selectivity control|
|High-pass filter||Low-pass filter|
|Bandpass filter||Bandstop filter|