Modulated fractional frequency synthesizer
lines(-1);
F_cpf = 20e6;
T_cpf = 1/F_cpf;
sig_ref=T_cpf*0.02/100
Fo = 2.045e9;
To = 1 / Fo;
wo=2*%pi * Fo;
kv = 100.5e6;
alpha=6.91e9;
beta2=0.15;
j_vco=0.2e6;
Fd=2.5e9;
N=int(Fd/F_cpf)
Nsampl = 2;
Tsampl = 1/(F_cpf*Nsampl);
Fsampl = 1 / Tsampl;
Icp = 5e-3;
Ileak=0.1e-6;
fn=F_cpf/180;
phi=%pi/4;
Ts=3/fn
Nech=12
Te=Ts/Nech
Nbit=3
M=32
[tau1,tau,tau2]=calcul_3eme_ordre(fn,phi,kv*2*%pi,Icp,N);
s=poly(0,'s');
num=1+tau1*s;
den=tau*s*(1+tau2*s);
Tfin=10e3*T_cpf
Figure : Scope results
Figure : Scope results
IRCOM Group
Alan Layec