% Chapter 8: Example 8.27
%            Chebyshev-1 Highpass Filter Design:
%                Use of the CHEBY1HPF function
%
% Digital Highpass Filter Specifications:
wp = 0.6*pi;                         % digital Passband freq in Hz
ws = 0.4586*pi;                      % digital Stopband freq in Hz
Rp = 1;                              % Passband ripple in dB
As = 15;                             % Stopband attenuation in dB

[b,a] = cheb1hpf(wp,ws,Rp,As);
[C,B,A] = dir2cas(b,a)
%%C = 0.0243
%%B = 1.0000   -2.0000    1.0000
%%    1.0000   -2.0000    1.0000
%%A = 1.0000    1.0416    0.4019
%%    1.0000    0.5561    0.7647