The analog chebyshev filter was converted into digital chebyshev filter using BLT method. The magnitude response for both LPF and HPF were plotted. Ripples in the pass band were observed and monotonic in stop band. The number of the peaks in the ripple defined the order of the filter.
For same input specifications for butterworth and chebyshev filter, order of chebyshev filter was smaller. Ultimately, this leads to lesser cost for the hardware required. It is better for the real time application.
Poles are inside the unit circle thus filters are stable(HPF and LPF)
ReplyDeleteThis is the stability criteria for Chebyshev filter
DeleteThe order of filter is less in Chebyshev as compared to butterworth.
ReplyDeleteButterworth low pass exhibits flat response within the pass region whereas, Chebyshev response has some ripple within this region.
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