Low-pass analog elliptic filter
Return the zeros, poles and gain of an analog elliptic low-pass filter prototype.
ellipap(n, Rp, Rs)
n |
Order of the filter. |
Rp |
dB of passband ripple. |
Rs |
dB of stopband ripple. |
This function exists for compatibility with 'Matlab' and 'OCtave' only, and
is equivalent to ellip(n, Rp, Rs, 1, "low", "s").
list of class Zpg containing zeros, poles and gain of
the filter.
Carne Draug, carandraug+dev@gmail.com. Conversion to R by Geert van Boxtel, G.J.M.vanBoxtel@gmail.com.
## 9th order elliptic low-pass analog filter zp <- ellipap(9, .1, 40) w <- seq(0, 4, length.out = 128) freqs(zp, w)
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