Discrete Voltage Controlled Oscillator

This diagram is an open loop model of a discrete Voltage Controlled Oscillator.

The regular output voltage can be described with this continuous equation :

The time domain integration of the input voltage is realized with the "EULERINTEGRAL" block that uses a discrete backward-Euler rule and the "VCOEVT" block produces events corresponding to zero crossings of the output waveform with a discrete method of detection.

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

- EULERINTEGRAL_m - Single step integrator block by Euler method
- NOISEBLK_f - Gaussian White Noise Generator block
- Time_f - Discrete time estimator bloc
- VCOEVT_f - Discrete zero crossing block

- scicos_vco - Continuous Voltage Controlled Oscillator (Scicos Diagram)
- VCO_c - Discrete Voltage Controlled Oscillator block (Scicos Block)