| 摘要 |
PURPOSE:To automatically produce time announcements of a required number by producing the time announcement at every just time until the count value of a counter coincides with the count value of an hour counter. CONSTITUTION:The frequency-divided outputs of the frequency dividing circuit 2 connecting to a reference signal generating source 1 are counted with a minute counter 3 and at the just time the counter 3 applies a carry signal to an hour counter 4 and a time announcement generating circuit 7. Then, the circuit 7 outputs the time announcement signals of a fixed period to produce the time annoncement sounds during the time until it is applied with the coincidence output from a comparator 8 by the coincidence of the count value of a counter 9 counting said signals and the count value of the counter 4. Hence, the time announcement sounds of the number corresponding to the just time may be produced with the simple constitution. |
