After completing methods of finding output of filter,we moved towards the design part of filter.In this experiment ,we have studied butterworth filter,low pass and high pass.we observed that butterworth filter have monotonic amplitude response in both pass band and stop band.Quick roll-off around the cut-off frequency,which improves with increasing order.Analog LPF poles lie on LHS of s-plane and digital poles lie inside the circle.These conditions denote stability of filter.
So when is the filter stable? When the poles lie on left or right?
ReplyDeleteFilter is stable when poles lie on left hand side of s-plane
ReplyDeleteButterworth filter is monotonic in nature
ReplyDeleteit is also referred as a maximally flat magnitude filter. The rate of falloff response of the filter is determined by the number of poles taken in the circuit
ReplyDeleteThe frequency response of the Butterworth filter is maximally flat
ReplyDeleteButterworth filters deal with higher order
ReplyDelete