| 摘要 |
PURPOSE:To let one switch serve both as a snooze switch and a stopping switch by detecting the operation times and operation time of the switch and controlling the snooze and stopping of the alarm. CONSTITUTION:The set output of an FF 38 corresponding to the operation of a switch 18 is applied to a first detection circuit 22 when an alarm is sounding and an inhibit gate 26 is held released. As a result, one operation of the switch 18 is detected and the snooze state where the alarm sound is stopped for a specified time by a snooze control circuit 14 is set by the set output of the circuit 22. On the other hand, the second detection circuit 20 which is constituted by FFs 64 thru 66, etc. resets the FF 30 of an alarm coincidence memory circuit 12 to put the alarm in the stop state by way of an OR gate 72 as the output of its FF 66 inverts only when the switch 18 is pushed and operated long more than a fixed time. Hence, one switch may be served both as a snooze switch and an alarm switch. |
