The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 16, 2014
Filed:
Apr. 18, 2008
Hugues Beaulaton, Toulouse, FR;
Thierry Cassagnes, Tournefeuille, FR;
Stéphane Colomines, Toulouse, FR;
Didier Salle, Toulouse, FR;
Hugues Beaulaton, Toulouse, FR;
Thierry Cassagnes, Tournefeuille, FR;
Stéphane Colomines, Toulouse, FR;
Didier Salle, Toulouse, FR;
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
A phase locked loop system, comprises: a voltage controlled oscillator circuit, comprising a first plurality of switchable varactors for selecting a frequency band of the VCO, that has a gain that changes with frequency band, and a second plurality of switchable varactors for varying the gain in the selected band. The PLL system has a PLL feedback circuit comprising a switching device for switching the feedback circuit to an open loop state wherein a plurality of predefined tuning voltages can be applied to the VCO; a frequency measurement device for measuring the synthesized VCO frequency; and a control unit operable to determine the gain with respect to the synthesized frequency and the tuning voltages.