In this experiment,we designed digital butterworth low pass filter and high pass filter.
The input specifications given were:
1) Passband attenuation
2) Stopband attenuation
3) Passband frequency
4) Stopband frequency
5) Sampling frequency
We noted down values of pass band attenuation and stop band attenuation from graphs obtained in Scilab.Analog LPF poles lie on the left hand side of the s-plane hence the analog filter is stable. Also the digital LPF poles lie inside the unit circle hence the Digital LPF also is stable. Thus the magnitude spectrum is monotonic in both passband and stopband.
The input specifications given were:
1) Passband attenuation
2) Stopband attenuation
3) Passband frequency
4) Stopband frequency
5) Sampling frequency
We noted down values of pass band attenuation and stop band attenuation from graphs obtained in Scilab.Analog LPF poles lie on the left hand side of the s-plane hence the analog filter is stable. Also the digital LPF poles lie inside the unit circle hence the Digital LPF also is stable. Thus the magnitude spectrum is monotonic in both passband and stopband.
butterworth filter gives plain magnitude response
ReplyDeleteyes
DeleteBLT is easy method for butterworth filter design
ReplyDeleteYes. It is easier than IIM method
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ReplyDeleteGood explanation
ReplyDeleteThank you!
ReplyDeleteTransition band width is greater in butterworth filter
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