scipy.signal.

cheb1ap

scipy.signal.cheb1ap(N, rp, *, xp=None, device=None)

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.

Parameters:

Nint

The order of the filter

rp: float

The ripple intensity

xparray_namespace, optional

Optional array namespace. Should be compatible with the array API standard, or supported by array-api-compat. Default: numpy

device: any

optional device specification for output. Should match one of the supported device specification in xp.

Returns:

z, p, k

Poles, zeros and gain for the filter prototype

See also

cheby1

Filter design function using this prototype