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:
Oct. 06, 1987
Filed:
May. 05, 1986
Applicant:
Inventors:
Heinz Hess, Weiterstadt, DE;
Horst Peth, Alsbach-Hahnlein, DE;
Assignee:
Robert Bosch GmbH, Stuttgart, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358 35 ; 358 37 ;
Abstract
To simplify the apparatus and the method steps to reestablish predetermined phase relationship of a chrominance TV signal with a reference, two chrominance derived signals of carrier frequency, respectively phase shifted by plus and minus 45.degree. with respect to the carrier frequency are obtained; chrominance derived signals, likewise phase shifted with respect to the input chrominance signal, are amplitude modulated with set voltages, and the amplitude modulated chrominance derived signals are so added that the phase position of the resulting chrominance signal will match that of the reference carrier.