| 摘要 |
PURPOSE:To prevent time lag of the next color synchronizing operation, by stopping a phase comparator during the fly-back period of the wave form of a sweep voltage. CONSTITUTION:A phase comparator 9 to which a reference signal is supplied from a burst gate 8 which is used for extracting a color burst from a composite color signal, an ACC detecting circuit 28, and a color killer circuit are operated only in a color burst period by a burst gate pulse supplied from a burst gate pulse generator 29. Since pulse generating of said generator 29 is stopped during a fly-back period of the wave form of the seep voltage by a stopping means 30, the burst gate pulse is not supplied to the burst gate 8, the ACC detecting circuit 28, and the color killer circuit 14 during the fly-back period, and, therefore, a condenser for smoothing or integration installed to each circuit is not set to an abnormal condition. |
