| 摘要 |
PURPOSE:To make possible highly accurate time measurement by detecting the rise of the operation signal by a first FF and inputting the output of a second FF reading the operation signal and said output to a reset signal making circuit thereby resetting the first FF. CONSTITUTION:When a switch 4 being an external operating member is operated, a first FF 10 is set at the rise of the operation signal and the OUT signal becomes H. The set signal S of a second FF 12 is outputted whtn the operation signal is H and the OUT signal is L. It is the time when the phi signal rises where the operation signal is L and the OUT signal is H that the output Q of the FF 12 becomes L. When the Q and phi signals become L, a reset signal is outputted from a gate 16 and the FF 10 is reset. The OUT signal becomes the signal which risesnearly at the same instant when the operating member is operated and falls when the operation is finished. Hence, if the start and stop of a stopwatch is controlled at the rising edge of this signal, the time measurement of high accuracy may be performed. |
