IIR Filter Design

Filter design functions

	butter Make an butterworth filter.
	cheby1 Make an chebyshev filter of type 1.
	cheby2 Make an chebyshev filter of type 2.
	ellip Make an elliptic filter.
	notch Make a notch filter.
	resgain Make a resonant gain filter.
	comb Make a comb filter.
	pole Make a simple pole
	zero Make a simple zero
	pole2 Make a complex pole pair
	zero2 Make a complex zero pair
	zpk Make a filter from zeros, poles and gain (zpk)
	rpoly Add a rational polynomial (rpoly)
	biquad Make a filter from b0, b1, b2, a1 and a2
	sos Make a filter from second order sections
	zroots Make a filter from z-plane roots
	direct Make a filter from the direct form
	closeloop Closed loop transfer function

alphabetic index hierarchy of classes

Please send questions and comments to zweizig_j@ligo.caltech.edu

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