Abstract:
L'invention concerne un circuit comportant : une source de courant (N4) destinée à être connectée en série avec une charge 1 entre deux bornes (21, 22) d'application d'une première tension continue (Vbat) ; un élément (3) limitant la tension aux bornes de la charge ; et un circuit d'asservissement de la valeur du courant dans la source de courant, sur le courant circulant dans ledit élément.
Abstract:
The invention relates to a method for assisting in the positioning of an electromagnetic transponder (2) in relation to a terminal (1) by a user, comprising the following steps consisting in: calculating and storing a current value of a ratio between the current coupling factor between the transponder and the terminal and an optimum coupling factor with a first resistive load value; comparing said current value to a previous value of the ratio, stored during a previous iteration; and controlling information elements (19') intended for the user, as a function of said comparison.
Abstract:
The invention relates to a method for securing a communication between an electromagnetic transponder and a terminal, in which the emission (47) of a query request (REQ) by the terminal is only authorised when the transponder is in mechanical contact or quasi mechanical contact with the terminal.
Abstract:
L'invention concerne une puce de circuit intégré comportant au moins une cellule mémoire non-volatile, un transistor MOS et un circuit électrique de rétention de charges pour une mesure temporelle comportant un élément capacitif de stockage de charges et, relié à cet élément, un élément (C3') d'écoulement de charges électriques comportant, sur un support isolant (23), un empilement d'une première électrode (18'), d'une couche diélectrique (ONO, GO1) dont au moins une portion (29) est adaptée à laisser circuler des charges par effet tunnel, et d'une seconde électrode (17), dans lequel au moins une des électrodes (18') est en silicium polycristallin non dopé. La cellule mémoire non-volatile, le transistor MOS et l'élément d'écoulement de charges partagent deux à deux des niveaux de diélectriques et de silicium poly crystallin.
Abstract:
The device comprises a contactless element (ME) and a set of at least two auxiliary elements (SEi), each auxiliary element including a slave SWP interface (SLINTi) connected to a same master SWP interface (MINT) of said contactless element (ME) through a SWP link (LK) and management means (MMG, AMGi) configured for activating at once only one slave SWP interface on said SWP link.
Abstract:
The invention relates to a method for controlling the power in an electromagnetic transponder in the field of a terminal, said method comprising the following steps: the consumption of the circuits of the transponder is evaluated; if this consumption is lower than a certain threshold, the current coupling factor (k) between the transponder and the terminal is evaluated; and the consumption of the transponder is increased (52) or a discordance of an oscillating circuit of the transponder is generated, depending on the current coupling.