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:
Feb. 20, 2001
Filed:
Jul. 02, 1991
Elie Brunet, Verrieres le Buisson, FR;
Jean-Luc de Gouy, Briis Sous Forges, FR;
Thierry Ginestet, Fontenay, FR;
Thomson-TRT-Defense, Guyancourt, FR;
Abstract
A frequency synthesizer comprises a single phase-locked loop controlled by a reference clock formed by a voltage-controlled oscillator, a programmable divider with variable division rank M, a phase detector, and a loop filter. It also comprises a predetermined number n of fractional division structures, each implementing a frequency step P,×F,lower than the reference frequency F,. Each fractional structure is coupled in parallel with said programmable divider to add to said division rank M fractional increments P,such that the ratio between the frequency F,provided by said oscillator and said reference frequency be defined as a function of said increments P,by the relationship: