BUILT-IN MATHEMATICA SYMBOL

EllipticFilterModel

EllipticFilterModel[n]
designs a lowpass elliptic filter of order n.

EllipticFilterModel[{n, _c}]
uses the cutoff frequency .

EllipticFilterModel[{"type", spec}]
designs an elliptic filter of the specified type , using the spec.

EllipticFilterModel[{"type", spec}, var]
expresses the model in terms of the variable var.

Details Details

EllipticFilterModel returns the designed filter as a TransferFunctionModel.
EllipticFilterModel[n] uses machine precision to return a filter with attenuation of at frequency 1.
In EllipticFilterModel[{"type", spec}, var], filter specification can be any of the following:

	{"Lowpass",{_p,_s},{a_p,a_s}}	lowpass filter specification
	{"Highpass",{_s,_p},{a_s,a_p}}	highpass filter specification
	{"Bandpass",{_s₁,_p₁,_p₂,_s₂},{a_s,a_p}}	bandpass filter specification
	{"Bandstop",{_p₁,_s₁,_s₂,_p₂},{a_p,a_s}}	bandstop filter specification

Frequency values should be given in an ascending order.
Values and are absolute values of passband and stopband attenuations, respectively.
Given a gain fraction , the attenuation .