| 摘要 |
PURPOSE:To attain cost reduction by decreasing the number of wirings for connection between an electronic computer and its peripheral devices. CONSTITUTION:High-order three bits of a counter 22 are used as the input of a comparator 23, and binary three bits are applied from a digital switch 21 as the input at the other side of the comparator 23. The counter 22 performs a count-up operation with the clock signal given from a computer 1. Here the output of high-order three bits has no change while the count value of the counter 22 is set at 0-7 and thus keeps '0'. Then the high-order 3rd bit is set at '1' when the count value of the counter 22 is equal to 8. Then the same state is kept until the count value of the counter 22 is equal to 15. Thus the first output unit 8 is actuated with the number of clock signals set at 0-7 by setting each digital switch 21 of plural input units 8 at such values as 0, 1, 2.... Hereafter the 2nd and 3rd units can be actuated successively with the number of clock signals set at 8-15 and 16-23 respectively. |
