LC Butterworth Filter Calculator
This calculator calculates the capacitor and inductor values for an LC Butterworth filter for a given order up to 10. The results are based on scaled prototype filters.
LC filters are typically used for higher frequencies - the mega Hertz range. For audio filters check out our active filter calculators.
Prototype filters with cut off at 1rad/sec and resistor of 1 ohm:
Here are the prototype Buterworth filter elements -
Filter scaling equations:
Where the ' designates the new desired filter characteristics.