| 摘要 |
An AC power supply apparatus used for an AC load of a high voltage such as a cold cathode tube. When a cold cathode tube is caused to emit a light, a DC voltage is on/off controlled at a predetermined ratio; thereafter, an AC signal of a high frequency is applied to the on/off controlled voltage in an oscillator circuit; then the resultant signal is boosted up to a predetermined level of voltage in a booster circuit; and thereafter, the AC power supply of the high voltage is applied to the load such as the cold cathode tube.
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