This was the first experiment performed using Scilab. Digital chebyshev filter was designed using BLT method.
The imput parameters were pass band attenuation(Ap), stop band attenuation(As), pass band frequency(Fp), stop band frequency(Fs) and sampling frequency(F). The observed and theoretical values of Ap and As were compared.
The slight difference in the values were due to variations in constant values and inaccuracies in measurement. More the order of the filter, less will be the difference between observed and theoretical Ap and As values.
They exhibit ripple in either pass band or stop band, however can be implemented with less order when compared with Butterworth filter
ReplyDeleteno. of ripples is equal to order of filter
ReplyDeleteThere are two types of filter- chebyshev 1 and chebyshev 2
ReplyDeleteOne of the main aspects of the Chebyshev filter is that it has a steep roll-off. It reaches its ultimate roll-off faster than other forms of filter. Accordingly is widely used in RF applications.
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ReplyDeleteChebyshev can be implemented practically
Type of the chebyshev filter is decided by ripples in stop band or pass band
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ReplyDeleteChebyshev filter minimize the errors between ideal and actual filter characteristics.
ReplyDeletethere is ripple in pass band for chebyshev 1 filter
ReplyDeleteChebyshev is characterized by ripples in pass band and monotonic in stop band.
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