| 摘要 |
PURPOSE:To simplify the constitution of a circuit, by reducing the number of bits by processing time data by a binary code. CONSTITUTION:When making a modifying switch 19 after setting the desired modifying time by means of a digital switch 13, the output of the switch 13 presets a binary coded decimal down counter 14 by the differential output while setting a FF16, and further resets a frequency divider 2 and a binary counter 3. Clock pulses from the frequency divider 2 are fed to counters 3, 14 because a gate 17a is opened by the output of the FF16, the content of the counter 3 becomes to the desired time set when the content of the counter 14 becomes zero, the FF16 is reset by the output of the counter 14 at that time and this circuit is returned to the ordinary condition. Thus, time can be modified by the simple constitution of the circuit. |
