FREQUENCY DIVISION CIRCUIT

PURPOSE:To make the 'High' and 'Low' times of an output signal equal by operating two dynamic frequency division circuits at reversal relation mutually, inputting their output signals to a differential amplifier, and setting the output of the amplifier as the output of this frequency division circuit. CONSTITUTION:A conventional dynamic frequency division circuit is composed of signal inversion circuits 10, 11 and FETs J10, J11, and the dynamic frequency division circuit is formed with signal inversion circuits 20, 21 and FETs J20, J21. Those two dynamic frequency division circuits are operated with input frequencies different from each other by one cycle. The differential amplifier 12 is to compare the potential of two inputted signals, therefore, OUT and OUTB are symmetric signals even when the waveform of the output signal is distorted, which makes the 'High' and 'Low' time of the output signal equal.