Active transponder switchable into passive transponder

G - Physics – 06 – K

Patent

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G06K 19/07 (2006.01)

Patent

CA 2312974

The invention concerns an active transponder (10) comprising an antenna (3), processing means (5) for receiving and supplying the antenna with identification data to be transmitted, powering means (7) for supplying a first signal (V1), storage means (12) for storing electric power and supplying a second signal (V2), and switching means (16) for connecting the processing means to the storage means or to the powering means. Said transponder also comprises first and second means (14, 15) for comparing the first and second signals with a predetermined threshold, and the switching means produces said connection on the basis of said comparisons. Such a transponder is useful for determining whether the voltage supplied by the powering means are sufficient for providing electric power to the different transponder components, in particular for ensuring the desired functions.

La présente invention concerne un transpondeur actif (10) comprenant une antenne (3), un moyen de traitement (5) pouvant recevoir et fournir à l'antenne des données d'identification à émettre, un moyen d'alimentation (7) pouvant fournir un premier signal (V1), un moyen de stockage (12) pouvant stocker de l'énergie électrique et fournir un deuxième signal (V2), et un moyen de commutation (16) pouvant réaliser une connexion du moyen de traitement au moyen de stockage ou au moyen d'alimentation. Ce transpondeur comprend également des premier et deuxième moyens (14, 15) pouvant comparer les premier et deuxième signaux à un seuil prédéterminé, et en ce que le moyen de commutation réalise ladite connexion en fonction des résultats de ces comparaisons. Un avantage d'un tel transpondeur est de déterminer si la tension fournie par le moyen d'alimentation est suffisante pour assurer l'alimentation électrique des différents composants du transpondeur, notamment pour réaliser les fonctions élémentaires désirées.

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