Low-pass filter

filter that passes signals with a frequency lower than a certain cutoff frequency, and attenuates signals with higher frequencies

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.

A passive low-pass filter
An active low-pass filter
Signal being filtered with 1 rad/s cutoff frequency low-pass filter

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