| 摘要 |
A PWM signal generator used for a booster circuit including a voltage-boosting coil that is connected to a main power supply, and a driving transistor that drives the voltage-boosting coil to generate boosted voltage, the PWM signal generator including a first amplifier that generates intermediate voltage based on a voltage value of the boosted voltage, a triangular wave generator that generates a triangular wave signal, a comparator that compares a voltage level of the intermediate voltage with a voltage level of the triangle wave signal to generate an intermediate PWM signal, a driver that generates a PWM signal supplied to the driving transistor based on the intermediate PWM signal, and a second amplifier that generates a driver power supply supplied to the driver based on magnitude of a voltage value of the intermediate voltage.
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