| 摘要 |
<p>PURPOSE:To miniaturize the title device by ORing the inverse output of a flip flop with the output pulses of the clock generator, and driving a switching element, and detecting the voltage of the electrode to be controlled of the switching element, and mounting and fixing a voltage detection circuit for externally triggering a clock generator. CONSTITUTION:When a switching element SW is turned off, the resonance capacitor CRES connected in parallel between these electrodes to be controlled is charged with electricity with specified time constant, an then a series resonance circuit is constituted of the primary coil L1 of a transformer 50 and the resonance capacitor CRES, so a circuit current oscillates. Therefore, a voltage detection circuit detects the minimum point of this oscillation voltage, and triggers it so that the clock generator 26 outputs pulses with that timing. Hereby, the switching element SW is turned on again. That is, by repeating the on-off operation of the switching element, voltage is induced in the secondary coil L2.</p> |
