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. 27, 1979
Filed:
Jul. 15, 1977
Applicant:
Inventors:
Pierre Oprandi, Paris, FR;
Jean-Claude Lehureau, Paris, FR;
Claude Puech, Paris, FR;
Jean-Paul Peltier, Paris, FR;
Francois Le Carvennec, Paris, FR;
Jean-Pierre Lacotte, Paris, FR;
Claude Bricot, Paris, FR;
Assignee:
Thomson-Brandt, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ; G11B / ;
U.S. Cl.
CPC ...
358127 ; 1791 / ; 358128 ; 360 33 ; 360 36 ;
Abstract
The present invention relates to the read-out of a data carrier having a track along which there is transcribed an angularly modulated carrier wave. In accordance with the present invention, there is provided a system for processing the read-out signal, which uses a feedback loop correcting the duty factor of a restored rectangular waveform when its value deviates from the value 0.5.