| 摘要 |
<p>PURPOSE:To reduce the number of switches by OR-connecting the turn-on terminal of a power source part to a manual reset terminal by a diode, and connecting it to the turn-on terminal of the switch for a power source. CONSTITUTION:A logic device having manual reset is equipped with the switch 3 for the power source to turn on/off the power source, the turn-on terminal 4 and the turn-off terminal 5 of the switch, a power source part 6 to generate DC output (a), a logic part 7, and the manual reset terminal 10 for the part 7. At this time, first and second diodes 11 and 12 are provided, and a manual reset switch is omitted. And in case of connecting the switch 3 for the power source to the turn-on terminal 4 during turning off the power source part 6, a switch turn-on signal on the said terminal 4 becomes valid as a turn-on signal for the power source part 6. At this time, in case of connecting the switch 3 for the power source to the terminal 4 side, the turn-on signal becomes invalid because the power source part 6 is already turned on, and it becomes valid for the logic part 7 as a manual reset signal.</p> |
