| 摘要 |
PROBLEM TO BE SOLVED: To generate a random number through simple hardware and to obtain superior periodicity by latching the output signal of a counter circuit when a composite signal outputted by a gate circuit rises or falls and outputting the numeral of the counter as a pseudo-random number value. SOLUTION: A clock generating means for latching generates different clocks L1 to Ln for latching which have clock pulse widths that are odd multiples of that of a reference clock and relatively prime. An (n)-bit counter 4 counts with (n)-bit width on the basis of a counter clock which has pulse width that is the same with the reference clock or optionally a power-raised multiple of a positive number. A gate circuit 1 puts the clocks for latching together in specific combination. An (n)-bit latch circuit 3 latches the output signal of the (n)-bit counter 4 when the composite signal outputted from the gate circuit 1 rises or fall and outputs the numeral of the counter as a pseudo-random number value. |
