Describing a circuit designed to attenuate frequencies above a specific cutoff point while leaving lower frequencies relatively unchanged. In power supplies, these filters remove high-frequency switching noise, while in audio systems they block treble from reaching subwoofers.
Add a simple RC lowpass filter to the sensor output to smooth out that high-frequency noise.
Related terms
Highpass
Describing a filter that allows high frequencies to pass through while attenuating lower frequencies.
Band-pass
Describing a circuit or filter that allows a specific range of frequencies to pass while blocking those outside the range.
Band-stop
Describing a circuit or filter that blocks a specific range of frequencies while allowing all others to pass.
Roll off
To gradually attenuate a signal's amplitude as its frequency moves past a specific cutoff point.