METHODE ET APPAREIL POUR CONTROLER UNE PLAGE D'ACCORD D'UN OSCILLATEUR COMMANDE EN TENSION DANS UN SYNTHETISEUR DE FREQUENCES

摘要

A frequency synthesizer (100, 500) provides multiple selectable voltage controlled oscillator (VCO) frequency ranges. A VCO control circuit (114) controls the selectable VCO frequency ranges based on lock conditions of selected VCOs within a VCO array (112) or a single variable VCO circuit (502), to provide an extended tuning range to the frequency synthesizer (100, 500).