Chebyshev Transfer Function in the Complex s Plane.

Cuthbert Nyack
The magnitude of the transfer function of the Chebyshev normalised low pass filter in the s plane is shown below.
The heavy black line in the middle of the plot shows the real s axis and the heavy magenta line along the +ve imaginary axis shows the frequency response of the filter.

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COPYRIGHT 2005 Cuthbert Nyack.