High pass filter

259

05:18:46

A high pass filter filters out low frequencies while allowing high frequencies through.

We can do this using either a capacitor or an inductor.

With a capacitor:  At high frequencies, the capacitors impedance is low, allowing current through.  At low frequencies, the impedance is high, blocking current.

With a inductor: At high frequencies, the inductor's impedance is high, blocking current from going to ground.  The impedance drops as frequency drops, allowing current to pass through.

published 12 years ago

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