Patent ID: 7378824
Filing Date: 2008-05-27
Classification: H02M,Y02B

Abstract:
1. A voltage converter for providing an output voltage signal at an output port according to an input voltage signal, comprising: a feedback circuit, for generating a feedback voltage signal according to the output voltage signal; a transmission switch circuit, for selectively transmitting a converted voltage signal to the output port of the voltage converter in a normal mode of the voltage converter or transmitting the input voltage signal to the output port of the voltage converter in a pre-bias mode of the voltage converter; a voltage converting circuit, coupled to the input voltage signal, the feedback voltage signal, a reference voltage signal, and the transmission switch circuit, for converting the input voltage signal into the converted voltage signal in the normal mode and referencing the feedback voltage signal and the reference voltage signal to adjust the output voltage signal in the normal mode through controlling the transmission switch circuit; a pre-bias circuit, coupled to the feedback signal, the reference voltage signal, and the transmission switch circuit, for controlling a magnitude of a current passing through the transmission switch circuit to the output port in the pre-bias mode; and a control switch circuit, coupled to the transmission switch circuit, the voltage converting circuit, and the pre-bias circuit, for selectively allowing the voltage converting circuit to control an on/off status of the transmission switch circuit in the normal mode or the pre-bias circuit to control the on/off status of the transmission switch circuit in the pre-bias mode.