Butterworth Low Pass Filter
2018-10-23 本文已影响0人
Green_Mage
The Butterworth type filter was first described by the British engineer Stephen Butterworth.
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.
