| 摘要 |
PURPOSE:To obtain the stabilized trigger pulse for a cathode ray tube notwithstanding fluctuation of load, fluctuation of AC voltage by a method wherein a fly-back pulse is taken out from an additional winding provided in a fly-back transformer. CONSTITUTION:The additional winding 20 is provided in the fly-back transformer 19, the fly-back pulse A is applied therefrom to the base of a transistor 15 in a converter circuit through resistors 21, 22, a capacitor 23, a diode 24, and the converter circuit is made to operate synchronizing with a horizontal synchronizing signal. Accordingly by taking out the fly-back pulse A from the fly-back transformer 19 and making to perform synchronization, the stabilized trigger pulse can be obtained notwithstanding even large fluctuation of load and fluctuation of AC voltage. |
