Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
February 24, 2009
0Patent Application Number
118538320
Date Filed
September 12, 2007
0Patent Primary Examiner
Patent abstract
An exemplary dual power supply system includes a first sensor connected to a first power supply, a second sensor connected to a second power supply, a selection switch, a control circuit, and a relay switch. Each of the output terminals of the first sensor, the second sensor, and the selection switch are connected to a corresponding input terminal of the control circuit. The first and the second power supplies are connected to an electronic device via the relay switch. A control terminal of the relay switch is coupled to an output terminal of the control circuit for selectively coupling the first or the second power supply to the electronic device according to a control signal generated by the control circuit.
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