Howtosignalprocessing
What is low pass filter?
A low-pass filter (LPF) is a circuit that only passes signals below its cutoff frequency while attenuating all signals above it. It is the complement of a high-pass filter, which only passes signals above its cutoff frequency and attenuates all signals below it.
What do you use a low pass filter for?
A lowpass filter removes frequencies above a defined cutoff frequency, while allowing those below to pass. This enables you to attenuate (lower the level of) high frequencies.
