Low-pass filter

A passive low-pass filter

An active low-pass filter

Signal being filtered with 1 rad/s cutoff frequency low-pass filter

A low-pass filter is an electronic filter that passes the frequency component of a signal below a certain value (cutoff frequency). The frequency component above that certain value will be suppressed to almost zero.

Related pages

• High-pass filter
• Band-pass filter
• Band-stop filter