| 摘要 |
PURPOSE:To change easily an expansion ratio of a pulse width through-out a wide range, by using the first and the second counters to expand the width of an input pulse. CONSTITUTION:When an input pulse is applied to an input terminal 10, a gate 1 is opened, and a clock pulse is inputted from an oscillator 2 to a counter 3. Meanwhile, a flip flop 4 is triggerred by the rise of the input pulse. A gate 5 is opened by the output, and the clock pulse is counted by a counter 7 after frequency division in a 1/n counter. When values of counter 3 and 7 coincide with each other, a comparator 8 detects this coincidence to change the output. Thus, a multivibrator 9 is driven, and the output resets the flip flop 4 as a reset pulse. |
