An rfid tag

G - Physics – 06 – K

Patent

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Details

G06K 19/073 (2006.01) G06K 19/07 (2006.01)

Patent

CA 2747092

An RFID tag comprising a coil and an RFID chip having two inputs/outputs, each input/output being connected to the coil. The tag further comprises an electrical circuit connected to the inputs/outputs, the circuit being adapted to operate in one of two modes, one mode outputting substantially no signal whereby the RFID chip is allowed to operate and a second mode being a mode wherein a signal is output so that the operation of the RFID-chip is interrupted. Alternatively, the circuit may have a lower operating voltage than the RFID-chip and may thus starve the RFID-chip and prevent its operation when desired.

L'invention porte sur une étiquette d'identification radiofréquence (RFID) comprenant une bobine et une puce RFID ayant deux entrées/sorties, chaque entrée/sortie étant connectée à la bobine. L'étiquette comprend en outre un circuit électrique connecté aux entrées/sorties, le circuit étant apte à fonctionner dans l'un de deux modes, un premier mode n'émettant sensiblement aucun signal, ce par quoi la puce RFID est autorisée à fonctionner et un second mode étant un mode dans lequel un signal est émis de telle sorte que le fonctionnement de la puce RFID est interrompu. En variante, le circuit peut avoir une tension de fonctionnement inférieure à celle de la puce RFID et peut ainsi alimenter de manière insuffisante la puce RFID et empêcher son fonctionnement si nécessaire.

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