I was wondering if I could get some help understanding the pole-zero plot of a filter. I did some search on Google and it seemed that tracing the ratio of all the zero vectors to all the pole vectors around a unit circle is the most popular method. Is there a faster method? For example, what symmetry does each one have etc... I can recognize low pass filters quickly because they don't have zeroes and the poles are symmetrical but what about other filters? Thanks in advance!
P.S. I'm only interested in Butterworth filters at the moment since that's the only type of filters we've covered this term. Also the professor is interested in us knowing the type of filters and not other characteristics such as loss rate or gain.
P.S. I'm only interested in Butterworth filters at the moment since that's the only type of filters we've covered this term. Also the professor is interested in us knowing the type of filters and not other characteristics such as loss rate or gain.