| 摘要 |
PURPOSE:To always set the drive current of a transistor to the optimum value by obtaining the drive current of the transistor by the composite output of drive windings provided at the primary and secondary sides of an output transformer of a leakage type. CONSTITUTION:The first and second drive windings 35, 36 provided at the primary and secondary sides of an output transformer 3 of a leakage type are wound at the positions separate from a leakage magnetic path of the core of the transformer 3, and connected in series with the pole. The outputs of the windings 35, 36 are combined together, and applied through a drive circuit 11 having a diode 10 and a capacitor 9 and drive resistors 12, 13 to the basses of transistors 4, 5. |
