- scipy.signal.cheb1ap(N, rp)[source]¶
Return (z,p,k) for Nth order Chebyshev type I analog lowpass filter.
The returned filter prototype has rp decibels of ripple in the passband.
The filter’s angular (e.g. rad/s) cutoff frequency is normalized to 1, defined as the point at which the gain first drops below -rp.