Scattered diagram of a third order integer-N frequency synthesizer
lines(-1);
F_cpf = 50e6;
T_cpf = 1/F_cpf;
sig_ref=T_cpf*0.2/100
Fo = 2.045e9;
To = 1 / Fo;
wo=2*%pi * Fo;
kv = 100.5e6;
alpha=6.91e9;
beta2=0.15;
j_vco=1e6;
N=52;
Fd=N*F_cpf;
Nsampl = 2;
Tsampl = 1/(Fd*Nsampl);
Fsampl = 1 / Tsampl;
Icp = 5e-3;
Ileak=1e-6;
fn=F_cpf/180;
phi=%pi/4;
kv=kv*2*%pi
[tau1,tau,tau2]=calcul_3eme_ordre(fn,phi,kv,Icp,N);
s=poly(0,'s');
num=1+tau1*s;
den=tau*s*(1+tau2*s);
kv=kv/(2*%pi)
Tfin=2e3*T_cpf
Figure : Scope results
IRCOM Group
Alan Layec