D.C. Tint control

Details D.C. Tint control D.C. Tint control

1979-06-07

1981-02-24

Murray, Richard

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 9535

Patent

active

042531098

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.

REFERENCES:
patent: 4051519 (1977-09-01), Harwood
patent: 4173770 (1979-11-01), Watanabe et al.

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