This experiment was done using scilab. In this experiment a digital filter was designed using analog filter. Digital butterworth filter can be designed using two methods impluse invariant method and BLT method. For HPF and LPF,all poles lie in the unit circle.Hence filters are stable. But the value of Ap in HPF and As in LPF are not completely verified, so we need to increase the order of the filter.
Link:- Butterworth
Link:- Butterworth
Analog Butterworth LPF has only poles and no zeros.
ReplyDeleteExtremely clear and concise explanation!
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ReplyDeleteYes it is because the roll off becomes steeper as the order increases.
DeleteChebyshev filters have sharper frequency cut-off while butterworth filters have a wide transition band
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