| 摘要 |
PURPOSE:To make a high output voltage stable by adding a voltage equivalent to the dropped high output voltage to a secondary winding of a flyback transforms. CONSTITUTION:The generating circuit consists mainly of a flyback transformer 2, a variable resistor 15 being a detecting means of a high output voltage, a high voltage control means 16, a multiple voltage circuit 17, a ternary coil 41 generating an AFC pulse, an integration circuit 42 integrating the AFC pulse, a horizontal AFC 43 synchronizing the AFC pulse with a synchronizing signal, conversion circuit 44 and a time constant control circuit 45. When a high output voltage is dropped, it is detected by the high output voltage detection means, a correction voltage generated in a correction voltage generating coil 19 is controlled to increase a voltage equivalent to the drop of the high output voltage. Thus, the high output voltage is made stable. |
