IIR Direct method with MIP and Tan Low Pass(log).
Cuthbert Nyack
Red shows the sampled filter response, orange shows the unit circle, green shows the filter poles and the N zeros at Z = -1. N
is the order of the filter and fc/fs is the cutoff frequency expressed as a
fraction of the sampling frequency. The applet shows the response on a linear
scale, vertical scale is 20dB/div when Vgain = 1 and horizontal scale is from 0
to 0.5 the sampling frequency when Fgain = 1.
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COPYRIGHT © 1999 Cuthbert A. Nyack.