8. IIR Filters Demos

yellow.gif 8-9,10,12,23,24,26 Pole-Zero plots via PeZ p210,215,223,233,234,235 - Several figures in Chapter 8 can be easily reproduced by using PeZ, the pole zero editor.
yellow.gif 8-27,28 Digital Filter Design Utility p236,237 - Interactively specify and design floating point digital filters.

The software provides a filter design tool for classical design which allows you to specify a FIR/IIR designs by setting design parameters such as filter type, sampling frequency, passband/stopband edge frequencies, passband/stopband ripple levels, and stopband attenuation.
You can select from design methods that include Butterworth, Chebyshev, Inverse Chebyshev, Elliptic, Kaiser Window, Dolph-Chebyshev, and Equi-Ripple.

yellow.gif 7.6 s-plane to z-plane p506 - See how poles and zeros change position between being plotted on the s-plane and being plotted on the z-plane. Input is either a filter specification or pole/zero locations on the z-plane.

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McClellan, Schafer, and Yoder, Signal Processing First, ISBN 0-13-065562-7.
Prentice Hall, Upper Saddle River, NJ 07458. © 2012 Pearson Education, Inc.