| 摘要 |
PURPOSE:To prevent the oscillation from stopping due to a shortcircuit of a load by positively feeding back the output current in the operation of a transistor. CONSTITUTION:When a power source switch 26 is closed, transistors 21, 22 are alternately turned ON to self-excite to oscillate. On the other hand, the output current generated at the secondary coil 20c is flowed through a circuit of the secondary coil 20c, a diode 27, the base - the emitter of the transistor 21 (positively feeding back) and a capacitor 29, thereby charging the capacitor 29. On the contrary, when the transistor 22 is conducted, the output current is flowed in the circuit of the secondary coil 20d, a diode 28, the base - the emitter of the transistor 22 (positively feeding back) and the capacitor 29, thereby charging the capacitor 29. |
