Experiment No. 5
The butterworth filter design was done for Low Pass and High Pass. It was done with specific input parameters like As, Ap , Pass Band frequency, Stop Band Frequency and Sampling frequency. H(z) for each were calculated and so was the order of the filter. The theoretical and observed values were compared. Maginitude spectrum and pole zero plot was drawn and it was observed that butterworth filters are monotonic in its pass band and stop band.
It was noticed that the magnitude response smooth in both pass band and stop band. With higher order, the magnitude response became sharoer and started resembling the ideal filter more closely.
Butterworth has no ripples
ReplyDeleteIn Butterworth filter order of the filter is more
ReplyDeletemagnitude responce is smooth in both HPF & LPF
ReplyDeleteButterworth filter is also called maximally flat magnitude filter
ReplyDeleteIt has constant amplitude in passband
ReplyDeleteIt requires large number of components.
ReplyDeleteIt gives Smooth magnitude Response.
ReplyDeleteNicely explained
ReplyDelete