Design of Chebyshev Filter.
The design procedure of chebyshev filter is very smiliar to that of Butterwoth Filter. In this experiment we implemented the Chebyshev Filter using BLT method. The parameters which were earlier used for design of butterworth filter are used for chebyshev filter. The magnitude response of chebyshev filter has ripple in passband depending upon the order of the filter and has monotonic response in stopband.
The design procedure of chebyshev filter is very smiliar to that of Butterwoth Filter. In this experiment we implemented the Chebyshev Filter using BLT method. The parameters which were earlier used for design of butterworth filter are used for chebyshev filter. The magnitude response of chebyshev filter has ripple in passband depending upon the order of the filter and has monotonic response in stopband.
Explain Frequency Warping in BLT method
ReplyDeleteIn BLT, Analog frequency in the range [ 0 to infinity ) is compressed to Digital frequency in the range [ 0 to pie]. This frequency compression is called frequency warping.
DeleteWhat are the disadvantages of IIR filter?
ReplyDeleteThe disadvantage of IIR filter is that they dont have linear phase response. Hence they provide distorted output and they are not always stable and also they are harder to implement using fixed-point arithmetic.
DeleteChebyshev filter has ripples in pass band and stop band
ReplyDeleteChebyshev filter have ripple in passband and no ripple in stopband
DeleteMinimum order of chebyshev filter is 2
ReplyDeleteYes. Unlike butterworth filter
DeleteTransition width is less than that of butterworth filter
ReplyDeleteThat's the advantage of butterworth filter
DeleteFor same analog filter input parameters, Chebyshev has lower order than butterworth hence it is easier to implement on hardware.
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ReplyDeleteChebyshev is characterized by ripples in pass band and monotonic in stop band.
ReplyDeleteAnd also the number of ripples in stopband determine the order of te filter
DeleteChebyshev Filter is an IIR filter and the disadvantage of IIR filter design method is that they are harder to implement using fixed point arithematic
ReplyDeleteAlso in order to determine the output of IIR filter we need to use difference equations
DeleteWhy do we use a digital filter?
ReplyDeleteWe basically use a digital filter because it provides stability against temperature and various other parameters and also provides a greater amount of flexibility
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