| 摘要 |
PURPOSE:To enable to make the time limit width with high accuracy and to make easy the alteration of the time width, by the constitution with FF, preset counter, clock pulse generator and presetter. CONSTITUTION:An input from a terminal 1 is differentiated at the trigger input pulse differentiation device 7, FF9 is set with the differentiation pulse 8, and the time width with the time preset setter 12 is preset to the preset counter 13 in binary system. The counter 13 counts with the clock pulse 11 from the clock pulse generator 10. During count-up, if no pulse 8 is generated, the counter 13 outputs the carry output 14, and generates the time limit end pulse 16 at the carry output differentiation device 15, and this pulse 16 resets FF9. Further, the output of FF9 is output from the terminal 6 as the output pulse of the retrigger monostable multivibrator. |
