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Iir Filter Design by Steve Winder is a book available to read on EtoBox.

What is Iir Filter Design about?

Infinite impulse response (IIR) filters are more efficient than FIR filters because, for a given frequency response, they require fewer delay elements, adders, and multipliers. The disadvantage of IIR filters is their nonlinear phase response (nonconstant group delay). Group delay has been discussed previously in Chapters 2 and 9 in relation to analog filters: a nonconstant group delay means that not all frequencies experience the same delay. Thus, impulses containing components with a wide range of frequencies will be distorted when passed through an IIR filter. Most IIR filters are designed using an analog filter model. Analog filter models are the familiar Butterworth, Chebyshev, Cauer (Elliptic), Inverse Chebyshev, and Bessel types. Generally speaking, Bessel models are not converted into digital filters. You may remember from Chapters 2 and 9 that the advantage of a Bessel response in an active or passive linear filter is the constant group delay, at the expense of a poor skirt response (the filter attenuation increases very slowly). FIR filters can produce a constant group delay with far superior skirt response, so they are used where group delay is important. The linear freq

Author

Steve Winder

Publisher

Elsevier

Published

2002

Language

EN