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:
Jul. 18, 2000
Filed:
May. 22, 1998
Applicant:
Inventor:
Xavier Cauchy, Meylan, FR;
Assignee:
SGS-Thomson Microelectronics S.A., Gentilly, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03B / ;
U.S. Cl.
CPC ...
327122 ; 327116 ;
Abstract
A frequency-doubling block includes an input terminal for the incident signal, a first variable delay cell linked to the input, and an EXCLUSIVE OR gate, one input of which is linked to the output of the first delay cell, the other input of which is linked to the input terminal, and the output of which is able to deliver an output clock signal at twice the frequency of the incident signal. A comparison circuit compares the duty ratio of the output signal with a predetermined reference value and a modulation circuit modulates the value of the first delay as a function of the result of the comparison.