| 摘要 |
<p>PURPOSE:To count the pulse number in the N bit by a simple constitution. CONSTITUTION:A pulse P1 is input from an input terminal 1, and a shift register 2 of N steps pickes in it by a clock CK, and when the shift register 2 does not output a pulse P0, the output of an EXOR circuit 3 is made ''H'', and an up and down counter 6 is up-counted as 1. When the shift register 2 outputs the pulse P0, and the pulse p1 is not input, the output of the EXOR circuit 3 is made 'H', and the pulse P0 passes through an AND gate 5 to down-count the up and down counter 6 as 1. Consequently, the count value N of the up and down counter 6 displays the pulse number in the N bit in the shift register 2.</p> |
