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:
Jan. 29, 2008
Filed:
Jan. 14, 2005
Serge Ramet, Grenoble, FR;
Pascal Triaire, Grenoble, FR;
Philippe Jouen, Grenoble, FR;
STMicroelectronics S.A., Montrouge, FR;
Abstract
The present invention relates to an RF integrated circuit comprising a frequency synthesizer and a QAM modulator for modulating a baseband signal of frequency F, the frequency synthesizer supplying to the QAM modulator an output signal of frequency Fadjustable with a frequency step ΔF, for forming a carrier signal of the QAM modulator. According to the present invention, the frequency synthesizer is a Vernier effect frequency synthesizer comprising an auxiliary frequency synthesizer supplying an auxiliary signal of frequency Fadjustable with a frequency step ΔFand a main frequency synthesizer having a phase-locked loop bandwidth at least two times higher than the frequency step ΔFof the auxiliary signal.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile