Patent ID: 6091617
Filing Date: 2000-07-18
Classification: G06F

Abstract:
Apparatus for selecting one of two voltages to be output for use as a power supply, the apparatus comprising:a first switch means connected to a first input;a second switch means connected between the first input and an output and further connected to the first switch means; anda third switch means connected between a second input and the output and further connected to the first and second switch means;wherein when a first voltage is present at the first input, the first and second switches are in a conductive state and the third switch means is in a nonconductive state, such that only the first voltage is provided at the output; andwherein when the first voltage is not present at the first input, the first and second switches are in a nonconductive state and the third switch is in a conductive state, such that a second voltage applied at the second input is provided at the output.