PROCEDE ET DISPOSITIF DE SYNTHESE DE FREQUENCE AU MOYEN D'UNE BOUCLE A PHASE ASSERVIE

摘要

The invention concerns a frequency synthesis method using a phase locked loop, including a phase comparator (3), comprising in particular a step which consists in switching from a fractional frequency division operating mode to a total frequency division operating mode after said loop operational stabilisation time or delay has elapsed. Said method is characterised in that it consists in operating said operating mode switching by masking or eliminating periodically part of the pulses of the reference (Sref) and comparison (Scomp) signals before applying them to the phase comparator (3) input .