| 摘要 |
PURPOSE:To display time leading or lagging the actual time by a fixed period of time in a needed period, by adding or subtracting desired numeric information to or from the count value of normal time information. CONSTITUTION:Normally, time information outputted by counter circuit 3 counting a fundamental frequency is applied to display part 12 to display the actual time. To advance the display time from the actual time by desired time only in a fixed period, numeric information corresponding to the advanced time is applied to arithmetic circuit 6 from key input 5 and added to the output of counter circuit 3 and counter circuit 4 counts the fundamental frequency. On the other, latch circuits 7 and 8 stored with the starting time and ending time of a fixed display period inputted from key 5 generate identity signals from comparators 9 and 10 at that time and FF11 changes switching circuit 13 over. In this way, the time lagging or leading the actual time by desired time can be displayed in a fixed period. |
