This was the second experiment using scilab. It was similar to the previous experiment but here we were designing a chebyshev filter.The Chebyshev filter was designed using the algorithm discussed in class.In chebyshev, the number of ripple peaks represent the order of the filter. Magnitude and pole zero plot was plotted of both LPF and HPF chebyshev filters. The poles were within the unit cirle.
The magnitude spectrum is equi-ripple in passband and monotonic in stop band. In butterworth filter, it was observed the opposite. For the same parameters the order of chebyshev filter is less than of butterworth filters.
This being similar to the butterwoth code, was relatively easier and thus took lesser time to finish. We had started this experiment before butterworth but completed it after finishing butterworth.
This being similar to the butterwoth code, was relatively easier and thus took lesser time to finish. We had started this experiment before butterworth but completed it after finishing butterworth.
Code can be found at :- https://drive.google.com/open?id=0Bzfvoo_rjoa8S19TN2V1SE9kckk
so was it chebyshev 1 or 2?
ReplyDeleteIt was chebyshev 1.
ReplyDeleteChebyshev 1 has ripple in passband
Deletethe Type II Chebyshef filter type is less common because it does not roll off as fast as Type I, and requires more components. It has no ripple in the passband, but does have equiripple in the stopband.
ReplyDeletewell described
ReplyDelete