Butterworth Pi LC High Pass Filter Calculator

Enter your values:
Cutoff Frequency:
Impedance Z0:
Number of Components: (1-11)
Capacitance: Inductance:
Unit : Unit :
C1: L1:
C2: L2:
C3: L3:
C4: L4:
C5: L5:

A PI filter is a filter that has a series element and two parallel elements connected in the shape of the Greek letter PI.

Butterworth filter are characterized by a constant gain (flat response) across the midband of the circuit and a 20 dB per decade roll-off rate for each pole contained in the circuit.

Butterworth filters are termed maximally flat magnitude response filters, optimized for gain flatness in the pass band. The attenuation is -3db at cutoff frequency. Above the cutoff frequency the attenuation is -20 db.

The Butterworth is the only filter that maintains same shape for higher orders whereas other varieties of filters (Bessel, Chebyshev, elliptic) have different shapes at higher orders.

A High pass filter is a filter that passes high frequencies, but attenuates frequencies lower than the cutoff frequency.