Patent ID: 6903537
Filing Date: 2005-06-07
Classification: H02M

Abstract:
1. A switching DC-to-DC converter, comprising: a first power supply channel coupled between a DC voltage source and ground, for converting the DC voltage source to a first DC output voltage; a second power supply channel coupled between the DC voltage source and ground, for converting the DC voltage source to a second DC output voltage which is separate from the first DC output voltage; and an oscillator for outputting a first oscillating signal having a first period to the first power supply channel and for outputting a second oscillating signal having a second period to the second power supply channel, wherein: during each period of the first period, the first oscillating signal presents a peak, a valley, a rising portion gradually increasing from the valley toward the peak, and a falling portion gradually decreasing from the peak toward the valley, such that at least one switching transition of the first power supply channel occurs during one selected from a group consisting of the rising portion and the falling portion; and during each period of the second period, the second oscillating signal presents an instantly transiting edge which simultaneously occurs with one selected from a group consisting of the peak and the valley, such that at least one switching transition of the second power supply channel simultaneously occurs with the instantly transiting edge.