| 摘要 |
<p>PURPOSE:To prevent rush current when the power is turned off and then turned on again directly after by adding a circuit generating a long-time delay until the power supply timer circuit performs effective operation from the turn-on of the power. CONSTITUTION:A power supply output control signal S6 is produced by a circuit comprising a reference time generating circuit part 1, delay circuit part 2, counting circuit part 3, reset signal generating circuit part 5, and current feed switch 8. The reference time generating circuit part 1 generates a timing clock signal S1, which is fed to the delay circuit part 2 and counting circuit part 3. The delay circuit part 2 counts the specified delay time, and the result is fed as a control signal to the counting circuit part 3, and the signal serves as a current feed switch effectiveness signal S3. The delay circuit part 2 is connected with the reset signal generating circuit part 5 and restitutes the count of the delay time to its initial condition when a reset signal S7 is given. This accomplishes preventing undue use of apparatus, etc., or its use when the rules are ignored.</p> |
