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Power transfer and voltage level conversion for a battery-powered electronic device

  • US 5,889,384 A
  • Filed: 02/20/1997
  • Issued: 03/30/1999
  • Est. Priority Date: 02/20/1997
  • Status: Expired due to Term
First Claim
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1. A power supply for a portable electronic device, comprising:

  • a power source which includes a DC power supply for providing a DC voltage, wherein the DC power supply includes one or more rechargeable DC batteries; and

    a first transformer portion having a primary transformer winding around a first core element,wherein the power supply cooperates with the portable electronic device, the portable electronic device including a second transformer portion having one or more secondary windings around a second core element, such that the first transformer portion and the second transformer portion form a complete transformer to transfer power between the power supply and the portable electronic device.

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