# RC High-Pass Filters

MathML formulaFormula ImageStraight text formula
$f c = 1 2πRC$ fc = 1 / 2πRC

Where

fc = cut off frequency, Hertz

= that frequency at which output power has fallen by half

= that frequency at which output voltage has fallen by 1/(2^0.5) = 0.707

R = resistance in Ohms