cheb1ap function

Chebyshev Type I filter prototype

Return the poles and gain of an analog Chebyshev Type I lowpass filter prototype.

cheb1ap(n, Rp)

Arguments

• n: Order of the filter.
• Rp: dB of pass-band ripple.

Returns

List of class Zpg containing the poles and gain of the filter.

Details

This function exists for compatibility with 'Matlab' and 'OCtave' only, and is equivalent to cheby1(n, Rp, 1, "low", "s").

Examples

## 9th order Chebyshev type I low-pass analog filter
zp <- cheb1ap(9, .1)
w <- seq(0, 4, length.out = 128)
freqs(zp, w)

Author(s)

Carne Draug, carandraug+dev@gmail.com .

Conversion to R by Geert van Boxtel, G.J.M.vanBoxtel@gmail.com .