- scipy.signal.cheb2ap(N, rs)#
Return (z,p,k) for Nth-order Chebyshev type II analog lowpass filter.
The returned filter prototype has attenuation of at least
rsdecibels in the stopband.
The filter’s angular (e.g. rad/s) cutoff frequency is normalized to 1, defined as the point at which the attenuation first reaches
Filter design function using this prototype