RAMP SIGNAL GENERATING METHOD AND GENERATOR THEREOF, AND PULSE WIDTH MODULATION SIGNAL GENERATOR

摘要

A ramp signal generating method and a generator thereof, and a pulse width modulation signal generator are provided. The ramp signal generating method includes following steps: receiving an error signal, wherein the error signal relates to an output voltage of a power converter; generating an error delayed signal according to the error signal; and providing a ramp signal according to the error signal and the error delayed signal. The ramp signal is phase leading and inverting compared to the error signal. The ramp signal serves to improve a response speed of the power converter.

主权项

1. A ramp signal generator, adapted to a power converter, the ramp signal generator comprising:
an input unit, receiving an error signal, wherein the error signal relates to an output voltage of the power converter; a delay unit, coupled to the input unit, and generating an error delay signal according to the error signal; and a conversion control device, coupled to the input unit and the delay unit, and providing a ramp signal according to the error signal and the error delay signal.