PULSE WIDTH MODULATION CIRCUIT

摘要

an integrating circuit made of a transistor which is turned on by a square-wave supplied to output a triangle wave to a node according to a power voltage, resistance and a condenser; a triangle wave generating part made of a zener diode confining a predetermined over voltage to the output part; an EX-OR logic processing means for comparing the output from the triangle wave generating part with the square-wave pulses inputted to the terminals; and an AND logic processing means for comparing the output from the EX-OR logic processing means with the square-wave pulses inputted to the terminals.