H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/59
H04N 9/64 (2006.01)
Patent
CA 1217857
Abstract Quadrature-related outputs of synchronized color reference oscillator at +(R-Y) and +(B-Y) phases are applied to a matrix to develop a third oscillatory signal of a third intermediate phase. Additional operations on the oscillator outputs develop oscillatory signals of different phases symmetrically disposed about the third phase. A differential amplifier, of substantially fixed gain, with differential inputs respectively responsive to the developed oscillatory signals, further develops a fourth oscillatory signal, with a phase in quadrature relation with said third phase, across an output load. The reference signal input for a demodulator is derived from signals appearing across said output load. A controlled amplifier, fed with the third oscillatory signal, is disposed to supply said third oscillatory signal as an additional oscillatory signal to said output load, when desired for hue adjustment purposes, with the magnitude of the supplied additional signal dependent upon the magnitude of difference, if any, between an adjustable control voltage and a reference voltage, and the polarity of the supplied additional signal dependent upon the sense of said difference.
440759
Eckersley Raymond A.
Rca Corporation
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