WO2000025254A1 - Read/write device for smart card - Google Patents

Read/write device for smart card Download PDF

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Publication number
WO2000025254A1
WO2000025254A1 PCT/FR1999/002638 FR9902638W WO0025254A1 WO 2000025254 A1 WO2000025254 A1 WO 2000025254A1 FR 9902638 W FR9902638 W FR 9902638W WO 0025254 A1 WO0025254 A1 WO 0025254A1
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WO
WIPO (PCT)
Prior art keywords
coils
card
read
frame
write device
Prior art date
Application number
PCT/FR1999/002638
Other languages
French (fr)
Inventor
Benoît Thevenot
Original Assignee
Schlumberger Systemes
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schlumberger Systemes filed Critical Schlumberger Systemes
Priority to EP99950870A priority Critical patent/EP1125240A1/en
Publication of WO2000025254A1 publication Critical patent/WO2000025254A1/en

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G06K7/10316—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers
    • G06K7/10336—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers the antenna being of the near field type, inductive coil

Definitions

  • the present invention relates to a reading and writing device for memory cards of the contactless type.
  • the contactless cards are cards constituted by a body of plastic material 10 in which an antenna 12 is formed consisting of one or more turns connected to a semiconductor wafer 14 in which the integrated circuits of the electronic module of the card.
  • Such cards are used with reading and writing devices which carry out an electromagnetic coupling with the antenna 12 of the card thanks to the presence of an electromagnetic coil opposite which the card must pass.
  • the electromagnetic field created by the reader provides the electrical energy necessary for the operation of the pad 14 of the card and it is moreover modulated and coded to transmit the information.
  • the information produced by the module 14 modifies the impedance of the antenna 12 and this modification of impedance is again detected by the electromagnetic field created by the coil of the read / write device.
  • the reader coil must create an electromagnetic field of sufficient intensity to achieve this coupling at a certain distance.
  • the electromagnetic field for safety reasons for the human body, must remain limited to a certain value. More specifically, in the case of contactless cards with on-the-fly reading of the ISO 14443 type. International administrative regulations fix a maximum admissible electromagnetic field value. However, these maximum values limit the distance that can exist between the reader coil and the card in order to have a correct exchange of information.
  • the read / write device for a memory card comprising a card body provided with electronic circuits connected to antenna forming means, is characterized in that it comprises a frame having a first portion of frame and a second portion of frame, the two portions of frame defining between them a space capable of leaving space for a card and two substantially identical coils forming an antenna, each coil being integral with one of the portions of frame so that the planes of the coils are parallel to each other and that the coils are opposite one another, the equivalent radius R of each coil being substantially equal to the distance H which separates the planes of the two coils; and means for applying the same current to the two coils and for receiving the signal collected by said coils.
  • these two coils are in the HelmHoltz position. As is known, these two coils create between them a substantially constant electromagnetic field. In addition, this local electromagnetic field is much lower as will be explained later on the magnetic field which would have been necessary in the case of a standard type reader for the reading distance to be effectively equal to the H value provided for in the claim. 1.
  • the frame has in cross section the shape of a U, the first and second portions of the frame corresponding to the branches of the U, these branches being substantially separated by the distance H.
  • the two portions of frame facing each other constitute a delimitation of the volume in which the user can move his card to make it read by the reader.
  • the equivalent diameter D of the two coils of the reader is between 3 and 12 cm.
  • - Figure 1 already described in a simplified manner shows the structure of a contactless memory card
  • - Figure 2 is a schematic horizontal sectional view of a read / write device according to the invention
  • - Figure 3 is a simplified perspective view of the read / write device of Figure 2 showing the coupling part between the reader and the card;
  • FIG. 4 is a diagram showing the electromagnetic fields created in the volume limited by the two coils of the reader.
  • This device consists essentially of an electromagnetic coupling part 18 and of a set of electronic circuits 20.
  • the electromagnetic coupling part 18 consists of a frame 20 whose cross section by a horizontal plane has the general shape of a U.
  • the branches 22 and 24 of the U are mutually parallel and thus define a slot 26 in which the card can be passed without contact.
  • the two frame portions 22 and 24, which are substantially parallel to each other, are connected by a third portion 28.
  • Each wing 22 and 24 of the frame comprises an electromagnetic coil 30 and 32 whose planes X and X 'are parallel to each other. These two coils have a suitable number of turns and have an equivalent radius R.
  • connection portion 28 is defined in such a way that the distance H between the planes X and X ′ of the coils is substantially equal to the equivalent radius of the coils 30 and 32
  • the coils 30 and 32 which are identical, are connected to the electrical and electronic circuits 20 of the reader / writer. These circuits 20 make it possible on the one hand to apply the same currents in the two coils 30 and 32 and to collect the electrical signals received by the coils 30 and 32 when the card transmits information. Of course, to transmit information, the two currents I applied to the coils are modulated.
  • the intensity B of the electromagnetic field has been represented as a function of the distance d relative to the center of the coil 30, for example along the axis common to the two coils. It can be seen that the sum of the two electromagnetic fields B1 and B2 makes it possible to obtain a resulting electromagnetic field B3 whose intensity is substantially constant.
  • the presence of the two wings of the frame which thus defines a slot of significant width for the passage of the contactless card limits by its very shape the possibilities of penetration of the user's hand between the reels and therefore of exposure to the electromagnetic field.
  • the invention also shows an important advantage.
  • the field is constant. However, the field produced by each coil is weak. Also, this field decreases rapidly outside the drive. Conflicts will therefore fewer and when the first carrier above example, released its sound card near the reader portfolio of the invention, only that card, passed through the gap of the drive will be read and / or written even if said first holder has other contactless cards in said wallet.

Abstract

The invention concerns a read/write device for smart card comprising a card body provided with electronic circuits connected to means forming an antenna. It further comprises a frame (18) with a first frame portion (22) and a second frame portion (24), the two frame portions being parallel to each other and defining between them a slot (26) for allowing a through passage for a card and two substantially identical coils (30, 32) forming an antenna, each coil being integral with one of the frame portions, such that the coil planes are parallel to each other and the coils are mutually opposite, the equivalent radius R of each coil being substantially equal to the distance H separating the two coil planes; and means (20) for applying a common current to both coils and for receiving the signal picked by said coils.

Description

Dispositif de lecture/écriture pour une carte à mémoire Read / write device for a memory card
La présente invention a pour objet un dispositif de lecture et d'écriture pour des cartes à mémoire du type sans contact. Les cartes sans contact, comme le montre la figure 1 annexée, sont des cartes constituées par un corps en matériau plastique 10 dans lequel est réalisée une antenne 12 constituée par une ou plusieurs spires raccordées à une pastille semi-conductrice 14 dans laquelle sont réalisés les circuits intégrés du module électronique de la carte. De telles cartes sont utilisées avec des dispositifs de lecture et d'écriture qui réalisent un couplage électromagnétique avec l'antenne 12 de la carte grâce à la présence d'une bobine électromagnétique en regard de laquelle doit passer la carte. Pour écrire des informations dans la carte, le champ électromagnétique créé par le lecteur fournit l'énergie électrique nécessaire au fonctionnement de la pastille 14 de la carte et il est de plus modulé et codé pour transmettre l'information. Pour lire une information dans la carte, l'information élaborée par le module 14 modifie l'impédance de l'antenne 12 et cette modification d'impédance est détectée à nouveau par le champ électromagnétique créé par la bobine du dispositif de lecture/écriture.The present invention relates to a reading and writing device for memory cards of the contactless type. The contactless cards, as shown in the appended FIG. 1, are cards constituted by a body of plastic material 10 in which an antenna 12 is formed consisting of one or more turns connected to a semiconductor wafer 14 in which the integrated circuits of the electronic module of the card. Such cards are used with reading and writing devices which carry out an electromagnetic coupling with the antenna 12 of the card thanks to the presence of an electromagnetic coil opposite which the card must pass. To write information in the card, the electromagnetic field created by the reader provides the electrical energy necessary for the operation of the pad 14 of the card and it is moreover modulated and coded to transmit the information. To read information from the card, the information produced by the module 14 modifies the impedance of the antenna 12 and this modification of impedance is again detected by the electromagnetic field created by the coil of the read / write device.
Dans le cas où on veut réaliser une lecture de la carte à la volée, c'est-à-dire lorsque le dialogue doit s'établir entre la carte et le lecteur sans que cette carte soit directement appliquée contre le lecteur, il faut que la carte puisse être maintenue à une certaine distance de la bobine tout en assurant un fonctionnement correct de l'ensemble lecteur-carte. On comprend que, dans ce cas. il faut que la bobine du lecteur crée un champ électromagnétique d'une intensité suffisante pour réaliser ce couplage à une certaine distance. Or. on comprend que le champ électromagnétique, pour des raisons de sécurité pour le corps humain, doit rester limité à une certaine valeur. Plus précisément, dans le cas de cartes sans contact avec lecture à la volée du type ISO 14443. des règlements administratifs internationaux fixent une valeur maximale de champ électromagnétique admissible. Or. ces valeurs maximales limitent la distance qui peut exister entre la bobine du lecteur et la carte pour avoir un échange d'information correct.If you want to read the card on the fly, that is to say when the dialogue must be established between the card and the reader without this card being directly applied against the reader, it is necessary that the card can be kept at a certain distance from the reel while ensuring correct operation of the reader-card assembly. We understand that in this case. the reader coil must create an electromagnetic field of sufficient intensity to achieve this coupling at a certain distance. However, it is understood that the electromagnetic field, for safety reasons for the human body, must remain limited to a certain value. More specifically, in the case of contactless cards with on-the-fly reading of the ISO 14443 type. International administrative regulations fix a maximum admissible electromagnetic field value. However, these maximum values limit the distance that can exist between the reader coil and the card in order to have a correct exchange of information.
Un objet de la présente invention est de fournir un dispositif de lecture/écriture pour cartes sans contact permettant une lecture à la volée qui autorise une distance relativement importante de l'ordre de 10 cm par exemple entre la carte et le lecteur tout en ne mettant en oeuvre qu'un champ électromagnétique d'intensité compatible avec les règlements administratifs. Pour atteindre ce but selon l'invention, le dispositif de lecture/écriture pour une carte à mémoire comprenant un corps de carte muni de circuits électroniques raccordés à des moyens formant antenne, se caractérise en ce qu'il comprend un bâti présentant une première portion de bâti et une deuxième portion de bâti, les deux portions de bâti définissant entre elles un espace apte à laisser le passage pour une carte et deux bobines sensiblement identiques formant antenne, chaque bobine étant solidaire d'une des portions de bâti de telle façon que les plans des bobines soient parallèles entre eux et que les bobines soient en regard l'une de l'autre, le rayon équivalent R de chaque bobine étant sensiblement égal à la distance H qui sépare les plans des deux bobines ; et des moyens pour appliquer un même courant aux deux bobines et pour recevoir le signal recueilli par lesdites bobines.An object of the present invention is to provide a reading / writing device for contactless cards allowing reading on the fly which allows a relatively large distance of the order of 10 cm for example between the card and the reader while not putting an electromagnetic field of intensity compatible with administrative regulations. To achieve this object according to the invention, the read / write device for a memory card comprising a card body provided with electronic circuits connected to antenna forming means, is characterized in that it comprises a frame having a first portion of frame and a second portion of frame, the two portions of frame defining between them a space capable of leaving space for a card and two substantially identical coils forming an antenna, each coil being integral with one of the portions of frame so that the planes of the coils are parallel to each other and that the coils are opposite one another, the equivalent radius R of each coil being substantially equal to the distance H which separates the planes of the two coils; and means for applying the same current to the two coils and for receiving the signal collected by said coils.
On comprend que, grâce à la présence des deux bobines et à la disposition particulière de ces deux bobines en fonction de leur dimension, ces deux bobines sont en position de HelmHoltz. Comme cela est connu, ces deux bobines créent entre elles un champ électromagnétique sensiblement constant. En outre, ce champ électromagnétique local est très inférieur comme on l'expliquera ultérieurement au champ magnétique qui aurait été nécessaire dans le cas d'un lecteur de type standard pour que la distance de lecture soit effectivement égale à la valeur H prévue dans la revendication 1.It is understood that, thanks to the presence of the two coils and the particular arrangement of these two coils as a function of their size, these two coils are in the HelmHoltz position. As is known, these two coils create between them a substantially constant electromagnetic field. In addition, this local electromagnetic field is much lower as will be explained later on the magnetic field which would have been necessary in the case of a standard type reader for the reading distance to be effectively equal to the H value provided for in the claim. 1.
De préférence, le bâti a en section droite la forme d'un U, les première et deuxième portions du bâti correspondant aux branches du U, ces branches étant sensiblement séparées par la distance H.Preferably, the frame has in cross section the shape of a U, the first and second portions of the frame corresponding to the branches of the U, these branches being substantially separated by the distance H.
On comprend que, selon ce mode de réalisation, les deux portions de bâti en regard constituent une délimitation du volume dans lequel l'utilisateur peut déplacer sa carte pour faire lire celle-ci par le lecteur.It is understood that, according to this embodiment, the two portions of frame facing each other constitute a delimitation of the volume in which the user can move his card to make it read by the reader.
De préférence également, le diamètre équivalent D des deux bobines du lecteur est compris entre 3 et 12 cm.Preferably also, the equivalent diameter D of the two coils of the reader is between 3 and 12 cm.
D'autres caractéristiques et avantages de l'invention apparaîtront mieux à la lecture de la description qui suit d'un mode de réalisation de l'invention donné à titre d'exemple non limitatif. La description se réfère aux figures annexées, sur lesquelles :Other characteristics and advantages of the invention will appear better on reading the following description of an embodiment of the invention given by way of non-limiting example. The description refers to the appended figures, in which:
- la figure 1 déjà décrite montre de façon simplifiée la structure d'une carte à mémoire sans contact ; - la figure 2 est une vue en coupe horizontale schématique d'un dispositif de lecture/écriture selon l'invention ; - la figure 3 est une vue simplifiée en perspective du dispositif de lecture/écriture de la figure 2 montrant la partie de couplage entre le lecteur et la carte ; et- Figure 1 already described in a simplified manner shows the structure of a contactless memory card; - Figure 2 is a schematic horizontal sectional view of a read / write device according to the invention; - Figure 3 is a simplified perspective view of the read / write device of Figure 2 showing the coupling part between the reader and the card; and
- la figure 4 est un diagramme montrant les champs électromagnétiques crées dans le volume limité par les deux bobines du lecteur.- Figure 4 is a diagram showing the electromagnetic fields created in the volume limited by the two coils of the reader.
En se référant maintenant aux figures 2 et 3, on va décrire un mode préféré de réalisation du dispositif de lecture/écriture. Ce dispositif est constitué essentiellement par une partie de couplage électromagnétique 18 et par un ensemble de circuits électroniques 20. La partie 18 de couplage électromagnétique est constituée par un bâti 20 dont la section droite par un plan horizontal a la forme générale d'un U. Les branches 22 et 24 du U sont parallèles entre elles et définissent ainsi une fente 26 dans laquelle on peut faire passer la carte sans contact. Les deux portions de bâti 22 et 24, qui sont sensiblement parallèles entre elles, sont raccordées par une troisième portion 28. Chaque aile 22 et 24 du bâti comporte une bobine électromagnétique 30 et 32 dont les plans X et X' sont parallèles entre eux. Ces deux bobines ont un nombre de spires convenable et présentent un rayon équivalent R. La portion de raccordement 28 est définie de telle manière que la distance H entre les plans X et X' des bobines soit sensiblement égal au rayon équivalent des bobines 30 et 32. Les bobines 30 et 32, qui sont identiques, sont raccordées aux circuits électriques et électroniques 20 du dispositif de lecteur/écriture. Ces circuits 20 permettent d'une part d'appliquer des mêmes courants dans les deux bobines 30 et 32 et de recueillir les signaux électriques reçus par les bobines 30 et 32 lorsque la carte émet une information. Bien entendu, pour transmettre une information, les deux courants I appliqués aux bobines sont modulés.Referring now to Figures 2 and 3, we will describe a preferred embodiment of the read / write device. This device consists essentially of an electromagnetic coupling part 18 and of a set of electronic circuits 20. The electromagnetic coupling part 18 consists of a frame 20 whose cross section by a horizontal plane has the general shape of a U. The branches 22 and 24 of the U are mutually parallel and thus define a slot 26 in which the card can be passed without contact. The two frame portions 22 and 24, which are substantially parallel to each other, are connected by a third portion 28. Each wing 22 and 24 of the frame comprises an electromagnetic coil 30 and 32 whose planes X and X 'are parallel to each other. These two coils have a suitable number of turns and have an equivalent radius R. The connection portion 28 is defined in such a way that the distance H between the planes X and X ′ of the coils is substantially equal to the equivalent radius of the coils 30 and 32 The coils 30 and 32, which are identical, are connected to the electrical and electronic circuits 20 of the reader / writer. These circuits 20 make it possible on the one hand to apply the same currents in the two coils 30 and 32 and to collect the electrical signals received by the coils 30 and 32 when the card transmits information. Of course, to transmit information, the two currents I applied to the coils are modulated.
On comprend que, grâce au fait que les deux bobines 30 et 32 sont sensiblement identiques et présentent chacune un rayon équivalent R sensiblement égal à la distance H qui sépare leurs plans, ces bobines sont dans des conditions de HelmHoltz. Cela signifie que, sensiblement, pour tout point du volume interne 26 limité par les deux ailes 22 et 24 du bâti du dispositif de lecture/écriture, le champ électromagnétique est sensiblement uniforme lorsque les courants appliqués aux bobines sont les mêmes.It is understood that, thanks to the fact that the two coils 30 and 32 are substantially identical and each have an equivalent radius R substantially equal to the distance H which separates their planes, these coils are in HelmHoltz conditions. This means that, substantially, for any point of the internal volume 26 limited by the two wings 22 and 24 of the frame of the read / write device, the electromagnetic field is substantially uniform when the currents applied to the coils are the same.
Sur la figure 4, on a représenté l'intensité B du champ électromagnétique en fonction de la distance d par rapport au centre de la bobine 30 par exemple selon l'axe commun aux deux bobines.. On voit que la somme des deux champs électromagnétiques Bl et B2 permet d'obtenir un champ électromagnétique B3 résultant dont l'intensité est sensiblement constante.In FIG. 4, the intensity B of the electromagnetic field has been represented as a function of the distance d relative to the center of the coil 30, for example along the axis common to the two coils. It can be seen that the sum of the two electromagnetic fields B1 and B2 makes it possible to obtain a resulting electromagnetic field B3 whose intensity is substantially constant.
Il est important de noter que, grâce aux dispositions de l'invention, pour obtenir un champ électromagnétique d'intensité par exemple 3,4.10° A/m grâce à la présence des deux bobines, il suffit de faire circuler dans ces bobines une intensité de 1 A. Dans le cas où la distance H entre les deux bobines est de l'ordre de 10 cm. ce qui permet une grande latitude pour l'utilisateur quant au déplacement de sa carte dans le lecteur, il aurait fallu un courant de 3,82 A, ce qui correspondrait à un champ électromagnétique de 9,62.10"5 A/m à une distance sensiblement nulle des bobines, soit presque trois fois le niveau maximal atteint avec les deux bobines 30 et 32 occupant des positions conformes à l'invention.It is important to note that, thanks to the provisions of the invention, to obtain an electromagnetic field of intensity for example 3.4.10 ° A / m thanks to the presence of the two coils, it suffices to circulate in these coils an intensity of 1 A. In the case where the distance H between the two coils is of the order of 10 cm. which allows a great latitude for the user as for the displacement of his card in the reader, it would have required a current of 3.82 A, which would correspond to an electromagnetic field of 9.62.10 "5 A / m at a distance substantially zero coils, almost three times the maximum level reached with the two coils 30 and 32 occupying positions according to the invention.
On comprend qu'il est ainsi possible de donner une grande latitude de positionnement de la carte, par exemple 10 cm par rapport aux bobines du lecteur du dispositif de lecture/écriture, tout en limitant le champ électromagnétique à une valeur restant dans le cadre des réglementations administratives en vigueur.It is understood that it is thus possible to give a large latitude in positioning the card, for example 10 cm relative to the coils of the reader of the read / write device, while limiting the electromagnetic field to a value remaining within the framework of the administrative regulations in force.
On comprend également que la présence des deux ailes du bâti qui définit ainsi une fente de largeur significative pour le passage de la carte sans contact limite par sa forme même les possibilités de pénétration de la main de l'utilisateur entre les bobines et donc d'exposition au champ électromagnétique. L'invention montre par ailleurs un avantage important. Lorsque le porteur d'une carte sans contact souhaite qu'une transaction électronique soit effectuée au moyen de sa carte mais qu'il possède d'autres cartes sans contact ou qu'un autre porteur de cartes, à proximité du premier porteur, possède aussi des cartes sans contact, il peut arriver, dans les lecteurs de l'état de la technique, qu'un conflit puisse s'établir, au moins deux cartes entrant dans le champ électromagnétique utile du lecteur. En conséquence de ce conflit, une mauvaise carte peut être lue et écrite.It is also understood that the presence of the two wings of the frame which thus defines a slot of significant width for the passage of the contactless card limits by its very shape the possibilities of penetration of the user's hand between the reels and therefore of exposure to the electromagnetic field. The invention also shows an important advantage. When the wearer of a contactless card wants an electronic transaction is carried out by means of the card but that it has other contactless card or another card holder, close to the first carrier, also has contactless cards, it can happen in the drives of the prior art, a conflict could be established, at least two cards entering the useful electromagnetic field of the reader. As a result of this conflict, a bad card can be read and written.
Dans l'invention, à l'intérieur du lecteur, le champ est constant. Toutefois, le champ produit par chaque bobine est faible. Aussi, ce champ décroît rapidement à l'extérieur du lecteur. Les conflits seront de ce fait moins nombreux et lorsque le premier porteur précité par exemple, sortira sa carte de son portefeuille à proximité du lecteur de l'invention, seule cette carte, passée dans l'entrefer du lecteur, sera lue et/ou écrite même si ledit premier porteur possède d'autres cartes sans contact dans ledit portefeuille. In the invention, inside the reader, the field is constant. However, the field produced by each coil is weak. Also, this field decreases rapidly outside the drive. Conflicts will therefore fewer and when the first carrier above example, released its sound card near the reader portfolio of the invention, only that card, passed through the gap of the drive will be read and / or written even if said first holder has other contactless cards in said wallet.

Claims

REVENDICATIONS
1. Dispositif de lecture/écriture pour une carte à mémoire comprenant un corps de carte muni de circuits électroniques raccordés à des moyens formant antenne, caractérisé en ce qu'il comprend un bâti présentant une première portion de bâti et une deuxième portion de bâti, les deux portions de bâti définissant entre elles une fente apte à laisser le passage pour une carte et deux bobines sensiblement identiques formant antenne, chaque bobine étant solidaire d'une des portions de bâti, de telle façon que les plans des bobines soient parallèles entre eux et que les bobines soient en regard l'une de l'autre, le rayon équivalent R de chaque bobine étant sensiblement égal à la distance H qui sépare les plans des deux bobines ; et des moyens pour appliquer un même courant aux deux bobines et pour recevoir le signal recueilli par lesdites bobines.1. Read / write device for a memory card comprising a card body provided with electronic circuits connected to antenna means, characterized in that it comprises a frame having a first portion of frame and a second portion of frame, the two frame portions defining between them a slot capable of allowing passage for a card and two substantially identical coils forming an antenna, each coil being integral with one of the frame portions, so that the planes of the coils are parallel to each other and that the coils are opposite one another, the equivalent radius R of each coil being substantially equal to the distance H which separates the planes of the two coils; and means for applying the same current to the two coils and for receiving the signal collected by said coils.
2. Dispositif de lecture/écriture selon la revendication 1 , caractérisé en ce que ledit bâti a, en section droite, la forme d'un U, les première et deuxième portions de bâti correspondant aux branches du U.2. Read / write device according to claim 1, characterized in that said frame has, in cross section, the shape of a U, the first and second frame portions corresponding to the branches of the U.
3. Dispositif de lecture/écriture selon l'une quelconque des revendications 1 et 2, caractérisé en ce que le rayon R est compris entre 3 et 12 cm. 3. Read / write device according to any one of claims 1 and 2, characterized in that the radius R is between 3 and 12 cm.
4. Dispositif de lecture/écriture selon l'une des revendications précédentes, caractérisé en ce que les deux portions de bâti sont sensiblement parallèles entre elles.4. Read / write device according to one of the preceding claims, characterized in that the two frame portions are substantially parallel to each other.
5. Dispositif de lecture/écriture selon l'une des revendications précédentes, caractérisé en ce que lesdits moyens pour appliquer un même courant aux deux bobines comprennent des moyens pour moduler lesdits courants par quoi lesdites bobines transmettent des informations avec ladite carte. 5. Read / write device according to one of the preceding claims, characterized in that the said means for applying the same current to the two coils include means for modulating the said currents whereby the said coils transmit information with the said card.
PCT/FR1999/002638 1998-10-28 1999-10-28 Read/write device for smart card WO2000025254A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP99950870A EP1125240A1 (en) 1998-10-28 1999-10-28 Read/write device for smart card

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR98/13502 1998-10-28
FR9813502A FR2785419B1 (en) 1998-10-28 1998-10-28 READ / WRITE DEVICE FOR A MEMORY CARD

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WO2000025254A1 true WO2000025254A1 (en) 2000-05-04

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EP (1) EP1125240A1 (en)
CN (1) CN1325518A (en)
FR (1) FR2785419B1 (en)
WO (1) WO2000025254A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
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WO2002047023A1 (en) * 2000-12-05 2002-06-13 Vfj Technology Pty Limited A smart token and reader device
WO2007072933A1 (en) * 2005-12-22 2007-06-28 Kyocera Corporation Communication terminal device, base station control device and mobile communication method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4791285A (en) * 1985-07-03 1988-12-13 Koatsu Gas Kogyo Co., Ltd. Read/write method by a non-contact system and between a storage substrate and read/write unit
US5149946A (en) * 1989-10-13 1992-09-22 Centre National De La Recherche Scientifique (Cnrs) Method of authenticating an object by electron paramagnetic resonance, apparatus for implementing the method, and an object useable with the method
US5258766A (en) * 1987-12-10 1993-11-02 Uniscan Ltd. Antenna structure for providing a uniform field

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4791285A (en) * 1985-07-03 1988-12-13 Koatsu Gas Kogyo Co., Ltd. Read/write method by a non-contact system and between a storage substrate and read/write unit
US5258766A (en) * 1987-12-10 1993-11-02 Uniscan Ltd. Antenna structure for providing a uniform field
US5149946A (en) * 1989-10-13 1992-09-22 Centre National De La Recherche Scientifique (Cnrs) Method of authenticating an object by electron paramagnetic resonance, apparatus for implementing the method, and an object useable with the method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002047023A1 (en) * 2000-12-05 2002-06-13 Vfj Technology Pty Limited A smart token and reader device
WO2007072933A1 (en) * 2005-12-22 2007-06-28 Kyocera Corporation Communication terminal device, base station control device and mobile communication method

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CN1325518A (en) 2001-12-05
EP1125240A1 (en) 2001-08-22
FR2785419A1 (en) 2000-05-05
FR2785419B1 (en) 2003-01-24

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