| 摘要 |
PURPOSE:To suppress spike noise and to prevent the malfunction of a D--flip-flop by setting a larger delay quantity than a shift of time between signals each applied to a first and a second input terminals to a delay circuit. CONSTITUTION:Levels of an input signal inputted to an input terminal 1 and an input signal applied to an input terminal 2 are inputted with a shift of time T1, therefore, to an output of an EXNOR 3, a spike noise is outputted for the time T1. A signal obtained by delaying the output of the EXNOR 3 by T2 through a delay circuit 4, and a signal applied to the input terminal 1 and an input terminal 2 are inputted to an AND 5. In such a case, the output signal outputted from an output terminal 6 is T2>T1, therefore, even if the level of a signal each applied to the input terminal 1 and the input terminal 2 is varied with a shift of the time T1, spike noise is not generated. |
