find_freq(1)

NAME
find_freq - parameter compatibility for elliptic filter design

CALLING SEQUENCE
[m]=find_freq(epsilon,A,n)

PARAMETERS

epsilon
    : passband ripple

A   : stopband attenuation

n   : filter order

m   : frequency needed for construction of elliptic filter

DESCRIPTION
Search for m such that n=K(1-m1)K(m)/(K(m1)K(1-m)) with

m1=(epsilon*epsilon)/(A*A-1);

If m = omegar^2/omegac^2, the parameters epsilon,A,omegac,omegar and n are then compatible for defining a prototype elliptic filter.

AUTHOR
F. D.