| 摘要 |
PURPOSE:To prevent a whisker from appearing in an output and evade an increase in the number of elements even if the number of input terminals increases by reading signals at data input terminals of all data FF circuits at the trailing edge of an output pulse of an up counter, and outputting a signal from an output terminal. CONSTITUTION:The signal from a switch 1 is inputted to the data input terinal D of a data FF circuit 3, an output terminal 7 is connected to an output terminal Q, and input and output terminals D and Q of the circuit 3 are connected to input terminals of an exclusive NOR circuit 8. Circuits mentioned above are provided as many as switches 1. The up counter 9 is reset with the AND output among outputs of all circuits 8 when the circuit 8 has >=2 outputs or directly with the output of the exclusive NOR when the exclusive OR has one output. Then, signals at data input terminals D of all circuits 3 are read in at the trailing edge of an output pulse of the counter 9 and a signal is outputted from its output terminal Q. |
