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DC power adapter system

  • US 6,266,261 B1
  • Filed: 04/03/2000
  • Issued: 07/24/2001
  • Est. Priority Date: 04/26/1994
  • Status: Expired due to Term
First Claim
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1. In a system for providing DC power to a portable electronic appliance, the system including a primary power adapter having a power input terminal adapted for receiving AC power within at least one of a set AC voltage range and a set AC current range and having a power output terminal to provide a DC signal to meet an input power requirement of the portable electronic appliance, the improvement including a secondary power adapter comprising:

  • a DC power input terminal adapted to receive a power signal from a DC power source within at least one of a set DC voltage range and a set DC current range; and

    a power output terminal adapted to couple to the power input terminal of the primary power adapter to apply an intermediate power signal to the power input terminal of the primary power adapter within at least one of the set AC voltage range and the set AC current range, wherein the intermediate power signal applied to the power input terminal of the primary power adapter causes the primary power adapter to provide the DC signal to meet the input power requirement of the portable electronic appliance.

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