Scilab 6.1.0
- Справка Scilab
- Signal Processing
- Filters
- How to design an elliptic filter
- analpf
- buttmag
- casc
- cheb1mag
- cheb2mag
- ell1mag
- eqfir
- eqiir
- faurre
- ffilt
- filt_sinc
- filter
- find_freq
- frmag
- fsfirlin
- group
- hilbert
- iir
- iirgroup
- iirlp
- kalm
- lev
- levin
- lindquist
- remez
- remezb
- srfaur
- srkf
- sskf
- syredi
- system
- trans
- wfir
- wfir_gui
- wiener
- wigner
- window
- yulewalk
- zpbutt
- zpch1
- zpch2
- zpell
Please note that the recommended version of Scilab is 2025.0.0. This page might be outdated.
See the recommended documentation of this function
find_freq
parameter compatibility for elliptic filter design
Syntax
[m]=find_freq(epsilon,A,n)
Arguments
- epsilon
passband ripple
- A
stopband attenuation
- n
filter order
- m
frequency needed for construction of elliptic filter
Description
Search for m such that n=K(1-m1)K(m)/(K(m1)K(1-m))
with
m1=(epsilon*epsilon)/(A*A-1);
If m = omegar^2/omegac^2, the parameters
epsilon,A,omegac,omegar and n are then
compatible for defining a prototype elliptic filter.
Here, K=%k(m) is the complete elliptic integral with parameter m.
See also
- %k — Полный эллиптический интеграл Якоби первого рода (векторизованный)
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