Patent ID: 7417412
Filing Date: 2008-08-26
Classification: H02M

Abstract:
1. A DC-DC converter comprising: a pulse width modulation (PWM) modulator configured to positively feed back a pulse width modulated signal of which a pulse width and a frequency are varied to generate an oscillated signal, configured to amplify a difference between a negatively fed-back direct current output signal and a reference signal to output a first signal, and configured to compare the first signal with the oscillated signal to generate a first switching signal and a second switching signal; a power switch configured to transfer an input signal to a first output node in response to the first switching signal and the second switching signal, and configured to generate the pulse width modulated signal, wherein the pulse width modulated signal is provided to the first output node; and a filter configured to generate a direct current output voltage signal in response to the pulse width modulated signal, wherein the direct current output voltage signal is provided to a second output node.