| 摘要 |
PROBLEM TO BE SOLVED: To realize a raster moire cancel circuit whose control circuit is simplified for a television receiver adopting a vertical output circuit not having an S-shaped correction capacitor. SOLUTION: A control current generated from a constant current source 3 is commutated by a current mirror circuit 1 so as to superimpose the current independently of the voltage at a connecting point among the constant current source 3, a vertical deflection coil 8 and a feedback voltage detection resistor 9 thereby realizing easily a moire cancel function. Furthermore, a voltage comparator circuit 6 and a constant current interruption circuit 4 are provided to allow a control voltage on the same line to control the operation/stop of the cancel circuit thereby simplifying the control circuit. |
