scipy.signal.cheb2ap(N, rs)[source]#

Return (z,p,k) for Nth-order Chebyshev type II analog lowpass filter.

The returned filter prototype has attenuation of at least rs decibels 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 rs.

See also


Filter design function using this prototype