Notch Filter

251

06:03:42

Notch filters, also known as Band-Reject Filters, are used to filter out a single frequency out of a frequency range.  These are often used to filter out the 60hz power hum in stereos.

A very simple notch filter uses a tuned LC circuit.  When the frequency to be filtered enters the circuit, the LC portion is in resonance, so all current and voltage goes to ground.

The notch frequency of this circuit is 80hz.

published 11 years ago

teislera

10 years ago

Could you possibly do a schematic on an rlc band reject filter using an op amp? I'm extremely lost in my circuits class and don't know what to do

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