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:
Jun. 12, 1984
Filed:
Feb. 22, 1982
Applicant:
Inventors:
Herbert Elmis, Denzlingen, DE;
Adrian Klar, Freiburg, DE;
Assignee:
ITT Industries, Inc., New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358 17 ; 307527 ;
Abstract
The invention provides a digital circuit for generating a binary signal output when a predetermined frequency ratio, v=f1/f2, of two signals F1 and F2 occurs during a selected measuring period. The circuit is particularly adapted for use in a color television receiver to determine the ratio between the chrominance-subcarrier frequency and the horizontal frequency, which ratio is fixed at the transmitting end, both in the PAL system and the NTSC system.