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Butterworth

FA generates a Butterworth filter upon the following command.

butterworth ( <order> ) ;
where <order> is the order of the filter. This will result in a ladder filter with a -3 dB bandwidth of 1rad/s. For instance:
butterworth(4);
results in a fourth-order Butterworth filter. To generate Butterworth cascade networks, specify a Chebyshev filter with zero ripple.



2009-06-03