//Calcul_3eme_ordre - Scilab function - //Return the zeros and the pole of a third order digital PLL type 2 //Based on the Rhode's Model //13 octobre 2003 - IRCOM GROUP - Author : A.Layec function [tau1,tau,tau2]=calcul_3eme_ordre(fn,phi,kv,icp,N) wn=2*%pi*fn; tau2=(-tan(phi)+1/cos(phi))/wn; tau1=1/(wn*wn*tau2); tau9=(kv*icp/(2*%pi))/(N*wn*wn); tau=tau9*sqrt((1+wn*wn*tau1*tau1)/(1+wn*wn*tau2*tau2)); c0=(tau2/tau1)*((kv*icp/(2*%pi))/(wn*wn*N))*sqrt((1+(wn*tau1)^2)/(1+(wn*tau2)^2)); c1=c0*((tau1/tau2)-1); r1=tau1/c1; endfunction