Filter Design Toolbox

This program can evaluate all filter types characteristics with some adequate inputs.

At first you should input some parameters like Wpass, Wstop, Apass, Astop, and etc. and then you can evaluate its magnitude response, phase response, impulse response, unit response, phase delay and group delay for the following filters:
Butterworth
Chebyshev type I
Chebyshev type II
Elliptic

with the following modes:
Low Pass
High Pass
Band Pass
Band Stop