Design of Chebyshev IIR Filter

The aim of the experiment is to design Analog and Digital Chebyshev Filter design.

 Input Specifications given are :

For LPF / HPF filter Design :

(1) Pass band Attenuation (Ap) ,  (2) Stop band Attenuation (As ),

(3) Pass band Frequency (Fp) in Hz  ,(4) Stop band Frequency (Fs) in Hz,

(5) Sampling Frequency in Hz.

The digital Chebyshev filter was designed using the same procedure as the Butterworth Filter using Scilab.The characteristics show the ripple behavior in pass band and monotonic in stop band.

 The number of peak and valleys in the pass band determine the order of the filter.

The basic difference between the Butterworth and chebyshev filter is that the poles of Butterworth filters lie on a circle and that of Chebyshev filter on the ellipse. It is because of their different characterics.

Chebyshev filters are analog or digital filters having a steeper roll-off and more pass band ripple (type I) or stop band ripple (type II) than Butter worth filters.

https://drive.google.com/drive/folders/0ByMxeH1FMa8uQm10b0dVeUVnNTQ