Name

zpbutt — Butterworth analog filter

Calling Sequence

[pols,gain]=zpbutt(n,omegac)

Parameters

n

integer (filter order)

omegac

real (cut-off frequency in Hertz)

pols

resulting poles of filter

gain

resulting gain of filter

Description

computes the poles of a Butterworth analog filter of order n and cutoff frequency omegac transfer function H(s) is calculated by H(s)=gain/real(poly(pols,'s'))

Authors

F. Delebecque INRIA