Here we designed a digital chebyshev filter using the analog filter and input specifications. Scilab software was used to write the code and also observe the output magnitude spectrum with frequency (Hz) on X axis and attenuation (dB) on Y axis. The conspicuous feature of the magnitude spectrum was that it exhibited ripple in passband and no monotonic in stop band. Moreover for almost similar input parameters the order of chebyshev filter was lesser compared to butterworth filter. That meant the chebyshev filter required less hardware components for its realization
The transition time for Chebyshev filter is less than that of Butterworth filter. So Chebyshev filter is better than Butterworth.
ReplyDeleteIIR filter design method has the disadvantage as it requires more memory
ReplyDeleteRipples give order of the filter.
ReplyDeleteYes and the minimum possible order for a chebyshev filter can be 2
DeleteThey are implemented with less order when compared with Butterworth filter
ReplyDeleteLess hardware components make its implementation easy
ReplyDeleteGood if pass band ripple can be tolerated
ReplyDeleteChebyshev filters come in 2 types Type 1 and Type 2. For the problem of pass band ripples , Chebyshev 2 can be implemented which is monotonic in Pass band.
DeleteHigh order filter gives accurate results but is computationally tedious
ReplyDeleteNicely explained
ReplyDeleteChebyshev has ripples in the passband
ReplyDelete