Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
September 2, 2008
Patent Application Number
11508618
Date Filed
August 23, 2006
Patent Primary Examiner
Patent abstract
A control circuit for a power supply circuit that selects an appropriate power source to continuously supply power. The control circuit includes a power synthesizing circuit for generating synthesized power by synthesizing a first power supplied from a regulator and a second power supplied from a regulator, or battery power and bus power, so that each circuit of the control circuit is operated by the synthesized power. Operation of the control circuit is enabled even if the supply of one power is stopped. The first switch device and the second switch device are controlled to select the appropriate power source in accordance with the currently supplied power so that power is continuously supplied.
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