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Contactless electronic communication device with optional auxiliary power source

  • US 20050178845A1
  • Filed: 03/17/2005
  • Published: 08/18/2005
  • Est. Priority Date: 12/09/1998
  • Status: Abandoned Application
First Claim
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1. A electronic electromagnetic communication device of the type comprising a battery-less card (40) having:

  • means (10) for receiving electromagnetic signals, means (18, 20, 24) for processing the electromagnetic signals received, and means (26) for rectifying and filtering the electromagnetic signals received in order to supply at two output terminals (A, B), a supply voltage (Vcc) to the processing means (18, 20, 24), two contacts (36, 38) on a surface of the card. and means (32, 34) for connecting said two output terminals (A, B) to the two contacts (36, 38), characterized in that said device also comprises a card holder (PC) having means for supporting an electrical power source (48, 70), and means (56, 58, 80, 82, 100, 102, 104, 106, 132, 140) for connecting said electrical power source (48, 70) via said two surface contacts to said output terminals (A and B) of the rectifying and filtering means (26).

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