| 摘要 |
<P>PROBLEM TO BE SOLVED: To initialize a control unit surely when a power switch is turned off. <P>SOLUTION: The initialization apparatus 91 comprises a one-shot multivibrator circuit 911 delivering a signal S2 (= off state: Low level) indicating the suspension of power supply from a commercial power supply to a power supply unit 7 when a zero-cross signal S1 from a zero-cross signal generation circuit 71 is not inputted for a predetermined period or longer, and transistors TR1 and TR2 for grounding the DC power supply line of 5V through a load resistor R2 when the signal S2 of the one-shot multivibrator circuit 911 turns into an off state (= Low level). <P>COPYRIGHT: (C)2008,JPO&INPIT |
