| 摘要 |
<p>PURPOSE:To turn off the power supplies of all systems with depression of the next power switch even when no coincidence is secured between the ON and OFF states of those power supplies by monitoring the power supply states of its own system and other systems and neglecting the power control pulse signal to be supplied to its own system as long as at least one of other systems is turned on when its own system is kept in an OFF state. CONSTITUTION:Each of multiplexed power supplies (#0 - #n) 10 - 1n is provided with a power ON/OFF sequence circuit 105 and an inference circuit. In a normal state the power supplies 10 - 1n are all turned on/off simultaneously. Then the power supplies 10 and 1n are turned off and on respectively and at the same time a power switch is depressed. In such conditions, the pulse signal that controls the power supply of a certain system is invalidated and this system is kept in an OFF state. Then other systems kept in the OFF states have their invalidated control pulse signals. Meanwhile the systems kept in the ON states have their valid control pulse signals and then changed to the OFF states. Thus, the power supplies of all systems are turned off with the depression of the next power switch even when no coincidence is secured between the ON and OFF states of those power supplies.</p> |
