Microcircuit with contact and non-contact operating modes

G - Physics – 06 – K

Patent

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Details

G06K 7/00 (2006.01) G06K 19/07 (2006.01)

Patent

CA 2262983

A microcircuit with two contact and non-contact operating modes, including communication means (2) specific for the non-contact operating mode, communication means (3) specific for the contact operating mode, electronic means (4) common to both operating modes, a coil (L) for receiving an AC voltage (Va) by induction, a rectifier circuit (Pd) for rectifying the AC voltage (Va) to give a first microcircuit power supply voltage (Vcc1), at least one power supply contact (p1) for receiving a second microcircuit power supply voltage (Vcc2), a distribution line (5) for distributing the first (Vcc1) or second (Vcc2) power supply voltages, a switch means (6, 13) between the power supply contact (P1) and the distribution line (5), and means (7, 8) for controlling the switch means, which means (7, 8) are arranged to sense said AC voltage (Va) across the terminals of the coil (L), and close said switch means (6, 13) when the second power supply voltage (Vcc2) is present on the power supply contact, or give priority to opening said switch means when the AC voltage (Va) is present across the terminals of the coil.

Microcircuit à deux modes de fonctionnement, avec ou sans contact, comprenant des moyens de communication (2) spécifiques au mode de fonctionnement sans contact, des moyens de communication (3) spécifiques au mode de fonctionnement avec contact, et des moyens électroniques (4) communs aux deux modes de fonctionnement, une bobine (L) pour recevoir par induction une tension alternative (Va), un circuit redresseur (Pd) de la tension alternative (Va) pour délivrer une première tension d'alimentation (Vcc1) du microcircuit, au moins un plot d'alimentation (p1) pour recevoir une deuxième tension d'alimentation (Vcc2) du microcircuit, une ligne {5) de distribution de la première (Vcc1) ou deuxième (Vcc2) tensions d'alimentation, un moyen interrupteur (6,13) agencé entre le plot d'alimentation (P1) et la ligne de distribution (5), des moyens (7, 8) de commande du moyen interrupteur, agencés pour détecter aux bornes de la bobine (L) ladite tension alternative (Va), fermer le moyen interrupteur (6, 13) quand la deuxième tension d'alimentation (Vcc2) est présente sur le plot d'alimentation, ou ouvrir prioritairement le moyen interrupteur quand la tension alternative (Va) est présente aux bornes de la bobine.

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