| 摘要 |
PURPOSE:To multiply surely a frequency by generating a triangle wave with an input pulse and generating a pulse every time the triangle wave reaches plural reference values obtained through the voltage division of a peak value of the preceding triangle wave. CONSTITUTION:An input signal E is converted into a rectangular wave at a waveform shaping circuit 4, the leading of the rectangular wave triggers a triangle wave generating circuit 5 so as to generate a triangle wave. The output is subjected to peak hold at a hold circuit 6, the voltage is divided by voltage division resistors 7, 8 and 9 so as to form two reference values, which are inputted to an inverting input of comparators 10, 11. Since said reference values are inputted to the other input of the comparators 10, 11, the time when the output of the comparators 10, 11 is inverted is different and monostable multivibrators 13, 14 output a pulse at a different point of time. Since the signals are inputted to an OR circuit 15 together with the output of a monostable multivibrator 12, the input signal is multiplied by three-folds. |
