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:
Nov. 06, 1979
Filed:
Jun. 07, 1978
Applicant:
Inventors:
Yasuaki Watanabe, Yokohama, JP;
Yukio Okabe, Yokohama, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358 28 ;
Abstract
A tint control circuit for color television receivers includes a voltage-controlled oscillator for locally generating a color subcarrier, a variable phase shifter shifting the phase of the generated subcarrier in dependence on a manually adjusted DC control voltage, and a phase detector which allows a received color burst to be supplied to a load circuit in dependence on the difference in phase between the color burst and the DC-controlled, variable phase-shifted subcarrier in order to derive a DC control voltage from the load circuit which controls the voltage-controlled oscillator.