D.c. tint control

Details D.c. tint control D.c. tint control

H - Electricity

04

N

350/59

H04N 9/64 (2006.01)

Patent

CA 1124846

D. C. TINT CONTROL ABSTRACT OF THE DISCLOSURE A D.C. tint control is described for use in a color television receiver. The tint control receives a pair of 3.58 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 tint control includes a current-steering circuit responsive to the value or the control voltage for steering a controlled portion or each quadrature current to a load, the latter of which is coupled to a color demodulator. The result- ant voltage across the over is a 3.58 megahertz signal whose phase is variable over a reproducible range of about ninety degrees.

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