| 摘要 |
PURPOSE:To prevent an oscillation from stopping due to a shortcircuit of a load by forming the same circuit configuration as full-wave rectification system of a bridge structure in the output current circuit. CONSTITUTION:An output current generated to the secondary coil 20c is flowed through the secondary coil 20c, a diode 27, base - emitter of a transistor 21, a capacitor 31 and a diode 30 when the transistor 21 is conducted, thereby charging the capacitor 31 in the polarity as shown. On the contrary, when the transistor 22 is conducted, an output current is flowed through the secondary coil 20c, a diode 29, the base - emitter of the transistor 22, the capacitor 31 and the diode 28, thereby charging the capacitor 31 in the polarity as shown. Thus, since the output current is positively fed back to the operation of the transistor, the transistor is reliably operated and oscillated even if the capacitor is charged until becoming zero volt. |
