zpbutt

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'))

Author

F. Delebecque INRIA