Discrete Voltage Controled Oscillator
This diagram is an open loop model of a discrete Voltage Controled Oscillator.
Regular output voltage can be described with this continous equation :
The noise introduces in the the tunning voltage ist a White Gaussian Noise.
The integral of the input voltage is realized with the EULERINTEGRAL block which use the discrete backward-Euler formula and
the VCOEVT block produces the event corresponding to a zero crossing with a discrete method of detection.
(cf Modnum block section to learn more).
Fo = 10e6;
To = 1 / Fo;
wo=2*%pi * Fo;
alpha=60e6;
kv=60e6
j_vco=100e6;
N=3;
Nsampl = 80;
Tsampl = To/(Nsampl);
Fsampl = 1 / Tsampl;
Tfin=15*To
Figure : Input and output voltage of VCO
Figure : Events generated by the VCOEVT block
Figure : Events generated by the frequency divider block
IRCOM Group
Alan Layec