CIRCUIT FOR GENERATING PULSE WIDTH MODULATION SIGNAL, AND DRIVING CIRCUIT FOR A MOTOR

摘要

The present invention relates to a PWM signal generating circuit and a motor driving circuit. The PWM signal generating circuit according to the present invention includes a proportional to absolute temperature (PTAT) voltage generator which generates a PTAT voltage in proportion to an absolute temperature, a reference wave signal generator which generates a preset reference wave signal, and a PWM signal generator which generates a PWM signal by comparing the PTAT voltage with the reference wave signal. The PTAT voltage generator controls the PTAT voltage according to a control signal. [Reference numerals] (100) Reference wave signal generator; (200) PTAT voltage generator; (300) PWM signal generator