| 摘要 |
PURPOSE:To improve the stability of a power source by differentiating the collector output of a drive transistor and adding it to the drive current of the transistor, thereby reducing the collector loss of the drive transistor. CONSTITUTION:A tertiary coil S is provided at a drive transistor T3, the collector and emitter voltage of a transistor TR2 is differentiated by a condenser C8 and a resistor R4, only one differentiated voltage is produced via a diode D9 to the coil S, thereby adding it to the drive current. Accordingly, the base current of the transistor TR2 is improved at the rise, the collector loss of the transistor TR2 is reduced, and the stability is improved. |
