| 摘要 |
PROBLEM TO BE SOLVED: To provide an edge detection circuit with which power consumption is suppressed by stopping operating a D flip-flop in the state of detecting no edge. SOLUTION: This circuit is composed of n or more than four of 1st-groups, D-FF 11 to 14, for receiving input signals, two of 2nd-groups, D-FF 21 and 22, for receiving edge detection control signals ENB, AND circuit 51 for inputting the output from the 1st stage 11 among the 1st-group D-FF, the inverted output from the 1st stage 21 among these 2nd-group D-FF and the output from the 2nd stage 22, and 3rd D-FF 31 for receiving the output of this AND circuit 51. |
