| 摘要 |
A tint control circuit is described for use in a color television receiver. The circuit generates four currents having substantially equal D.C. components, and having respective 3.58 MHz subcarrier components of four different quadrature phases. The phase of each such current is preferably variable over a range of +/-45 degrees. In a preferred embodiment, the four currents are coupled to a matrixing network for developing a pair of subcarrier output voltages whose phases differ by more than 90 degrees and whose D.C. components are substantially equal. As the phases of the four currents are varied, the phases of the subcarrier output voltages vary accordingly, but maintain their phase relationship to each other.
|
