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RC circuit

by Chris Meyer | Oct 28, 2019

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Most filters are based on an RC circuit – resistor plus capacitor – with their combination yielding the cutoff frequency of the filter. In most designs, the resistor or “R” is varied to change that frequency – either by a front panel knob, or a control voltage converted into either a variable resistance or a variable current (according go Ohm’s Law, a voltage across a resistor equals current).

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