Patent ID: 6404077
Filing Date: 2002-06-11
Classification: G06F

Abstract:
A method of selecting between two different voltages to be provided at an output of a power selector, the method comprising:connecting a first switch means to a first power selector input; connecting a second switch means between the first power selector input and a power selector output, and to the first switch means; connecting a third switch means between a second power selector input and the power selector output, and to the first and second switch means, where one of the first and second power selector inputs is a main input and, the other of the first and second power selector inputs is a default input; determining whether a first voltage is applied at the first power selector input; if a first voltage is detected at the first power selector input, providing the first voltage at the power selector output and preventing a second voltage applied at the second power selector input from being provided at the power selector output; and if a first voltage is not detected at the first power selector input, providing the second voltage applied at the second power selector input, at the power selector output.