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. 24, 1981
Filed:
Jun. 07, 1979
George J Tzakis, Glenview, IL (US);
Zenith Radio Corporation, Glenview, IL (US);
Abstract
A D.C. tint control is described for use in a color television receiver. The tint control receives a pair of 3.8 megahertz currents which are preferably in phase quadrature with each other, and a D.C. control voltage whose value is variable by a viewer to change the tint of reproduced color images. The ting control includes a current-steering circuit responsive to the value of the control voltage for steering a controlled portion of each quadrature current to a load, the latter of which is coupled to a color demodulator. The resultant voltage across the load is a 3.58 megahertz signal whose phase is variable over a reproducible range of about ninety degrees.