DE4443979C1 - Chip card with contact surfaces and data exchange coils - Google Patents
Chip card with contact surfaces and data exchange coilsInfo
- Publication number
- DE4443979C1 DE4443979C1 DE4443979A DE4443979A DE4443979C1 DE 4443979 C1 DE4443979 C1 DE 4443979C1 DE 4443979 A DE4443979 A DE 4443979A DE 4443979 A DE4443979 A DE 4443979A DE 4443979 C1 DE4443979 C1 DE 4443979C1
- Authority
- DE
- Germany
- Prior art keywords
- chip card
- contacts
- information
- coil
- circuit
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
- H01Q1/2225—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
- G06K19/07766—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card comprising at least a second communication arrangement in addition to a first non-contact communication arrangement
- G06K19/07769—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card comprising at least a second communication arrangement in addition to a first non-contact communication arrangement the further communication means being a galvanic interface, e.g. hybrid or mixed smart cards having a contact and a non-contact interface
-
- 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
- G06K7/0008—General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
-
- 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
- G06K7/10326—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 very-near field type, e.g. capacitive
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Toxicology (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Health & Medical Sciences (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electromagnetism (AREA)
- General Health & Medical Sciences (AREA)
- Computer Networks & Wireless Communication (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
Description
Die Erfindung bezieht sich auf eine Chipkarte gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to a chip card according to the preamble of patent claim 1.
Es sind Chipkarten (Kombinationschipkarten, Hybridkarten) aus der DE 39 35 364 bekannt, welche sowohl kontaktfrei als auch kontaktbehaftet mit ihren Endgeräten (Schreib/Lesegeräten) Energie und Daten austauschen können. Diese Karten können für vielfache Anwendungen wie beispielswei se Telefonkarten, Gesundheitskarten, Zutrittskontrollkarten eingesetzt wer den.They are chip cards (combination chip cards, hybrid cards) from DE 39 35 364 known, which is both non-contact and contact with exchange energy and data on their end devices (read / write devices) can. These cards can be used for multiple applications such as se phone cards, health cards, access control cards the.
Der Erfindung liegt die Aufgabe zugrunde, das kontaktfreie Übertragen von Informationen von der Karte zu einer Kartenlesestation zu verbessern.The invention has for its object the contactless transmission of Improve information from the card to a card reader.
Karten, wie sie in dem internationalen Standard ISO 10536 beschrieben sind, sollen Informationen nur über sehr kleine Distanzen übertragen können und zum Betrieb in einen Leser eingeschoben oder auf einen Leser aufge legt werden. Sie werden Nahbereichskarten bezeich net. Für Fernbereichskarten, welche über Entfernungen bis zu 100 cm In formationen übertragen können, ist mit einer Standardisierung (ISO 14 443) im Herbst 1994 begonnen worden. Ein fertiger Standard ist nach allgemeiner Erfahrung in einigen Jahren zu erwarten.Cards as described in the international standard ISO 10536 are, should Can only transmit information over very small distances and inserted into a reader for operation or opened onto a reader be placed. They are called short-range maps net. For long-range maps that cover distances of up to 100 cm Formations can be transferred with a standardization (ISO 14 443) was started in autumn 1994. A finished one According to general experience, standard can be expected in a few years.
Vom Markt werden standardisierte Karten nachgefragt, welche in den viel fach installierten Kontaktkartenlesern genutzt werden können und welche zusätzlich das Übertragen von Informationen über Entfernung zulassen. In eine solche Karte könnten über die Kontakte gemäß Patent DE 39 35 364 Informationen geladen werden und über die kontaktfreie Strecke könnten die Informationen ausgelesen werden. Ist eine solche Karte streng nach ISO-Normen aufgebaut, kommt nur eine Nahbereichskarte gemäß ISO 10536 infrage, d. h. die Karte muß auch beim kontaktfreien Auslesen in ei nen Leser gesteckt oder auf den Leser aufgelegt werden. Beim schnellen Identifizieren der Karte an U-Bahnstationen, an Firmeneingängen, etc. würden sich durch die benötigten Zeiten zum Einstecken und Auslesen der Karten Warteschlangen ergeben. Somit besteht die erfindungsgemäße Aufgabe, eine Karte streng nach Norm zu konzipieren, welche zusätzlich über größere Ent fernungen Informationen überträgt.The market is asking for standardized cards, which in the many Tray installed contact card readers can be used and which additionally allow the transmission of information about distance. In such a card could be made via the contacts according to patent DE 39 35 364 Information could be loaded and about the contactless route the information is read out. Such a card is strictly after ISO standards built, comes only a short-range map according to ISO 10536 in question, d. H. the card must also be read out in a non-contact manner a reader or put on the reader. When fast Identify the card at subway stations, company entrances, etc. yourself through the times required to insert and read the cards Queues result. The object of the invention is therefore to design a card strictly according to the standard, which also has larger ent distant information.
Diese Aufgabe wird durch die im Anspruch 1 angegebenen Merkmale gelöst.This object is achieved by the features specified in claim 1 solved.
Fig. 1 zeigt schematisch eine Spule (4), welche mit ihren Ausgängen (10) an die elektronische Schaltung (11) angeschlossen ist. Die elektronische Schaltung (11) ist mit ihren Ausgängen (13) per gestrichelter Linie (12) an Kontaktflächen (2) im Kontaktfeld (1) angeschlossen. Fig. 1 shows schematically a coil ( 4 ) which is connected with its outputs ( 10 ) to the electronic circuit ( 11 ). The outputs ( 13 ) of the electronic circuit ( 11 ) are connected to contact surfaces ( 2 ) in the contact field ( 1 ) by a dashed line (12).
Fig. 2 zeigt schematisch eine Spule (4), welche mit ihren Ausgängen (10) an die elektronische Schaltung (11) angeschlossen ist. Ein Kondensator (3) wird mit seinen Ausgängen über die Schalter (8) wahlweise an die Kontakte (7) oder (6) angeschlossen. Die Schaltstellungen des Schalters (8) werden von der Elektronik (11) bestimmt, was durch die gestrichelten Linien (9) symbolisiert ist. Die Kontakte (6) stellen Abgriffe an der Spule (4) dar. Die Kontakte (7) stellen Kontakte zur Elektronik (11) dar, welche patentgemäß dazu dienen, den Kondensator (3) elektrisch zu laden. Fig. 2 shows schematically a coil ( 4 ) which is connected with its outputs ( 10 ) to the electronic circuit ( 11 ). A capacitor ( 3 ) is connected with its outputs via switches ( 8 ) to contacts ( 7 ) or ( 6 ). The switch positions of the switch ( 8 ) are determined by the electronics ( 11 ), which is symbolized by the dashed lines (9). The contacts ( 6 ) represent taps on the coil ( 4 ). The contacts ( 7 ) represent contacts to the electronics ( 11 ), which according to the patent serve to electrically charge the capacitor ( 3 ).
Anspruch 1 beschreibt die Nutzung der metallenen Kontaktflächen (2) einer herkömmlichen Chipkarte als Antennenelemente zum Übertragen von In formation. Werden die Kontaktflächen (2) als Kapazitäten in einem offenen Schwingkreis genutzt, strahlen sie elektrische Felder parallel zur Ebene ihrer Oberfläche ab. Ihre Nutzung als Antennenelemente stellt somit gleichzeitig eine Nutzung als elektrische Kapazitäten dar. Werden an die Kontaktflächen (2) durch eine elektronische Schaltung (11) zeitlich verän derliche Spannungen angelegt, werden elektromagnetische Wellen von den Kontaktflächen abgestrahlt. Je kürzer die Zeiten der Spannungsverän derung an den Kontaktflächen (2), desto größer ist die Frequenz der ab gestrahlten elektromagnetischen Welle. Bei Anlegen eines Rechteckspan nungsimpulses werden die Frequenzen der abgestrahlten Wellen von dem Anstiegswinkel (Abfallwinkel) des Impulses, die Amplitude von der Höhe des Impulses bestimmt. Bei geeignetem Aufbau der Schaltung (11) kann somit eine Welle über die Kontakte in den umgebenden Raum ge sandt werden, die entfernt nachgewiesen werden kann. Die abgestrahlte Welle kann Frequenzen haben, die weit genug von den Frequenzen ent fernt sind, welche zur Spule (4) nach üblichen Methoden übertragen wer den, wie sie beispielsweise in dem Standard ISO 10536 beschrieben sind. Somit ist eine gegenseitige Beeinflussung der Wellen minimiert.Claim 1 describes the use of the metal contact surfaces ( 2 ) of a conventional chip card as antenna elements for transmitting information. If the contact surfaces ( 2 ) are used as capacitors in an open resonant circuit, they emit electrical fields parallel to the plane of their surface. Their use as antenna elements thus also represents use as electrical capacities. If voltages that vary over time are applied to the contact areas ( 2 ) by an electronic circuit ( 11 ), electromagnetic waves are emitted from the contact areas. The shorter the times of the voltage change at the contact surfaces ( 2 ), the greater the frequency of the electromagnetic wave emitted. When a square wave voltage pulse is applied, the frequencies of the emitted waves are determined by the rise (fall) angle of the pulse, the amplitude by the height of the pulse. With a suitable structure of the circuit ( 11 ), a wave can thus be sent via the contacts into the surrounding space, which can be detected remotely. The emitted wave can have frequencies far enough from the frequencies ent which are transmitted to the coil ( 4 ) according to the usual methods, such as are described, for example, in the ISO 10536 standard. Mutual influence of the waves is thus minimized.
Es wird die Verbindung einer elektronischen Schaltung (11) mit den Kontak ten (2) beschrieben. Die Schaltung (11) befindet sich in der Chipkarte und gewinnt Energie aus dem Wechselfeld der Spule (4). Ein Teil dieser Ener gie wird von der Elektronik (11) an einen oder mehrere der Kontakte (2) zwecks kontaktfreier Übertragung von Information anlegt. Die Energie kann aus einem Schwingkreis bezogen werden und somit zeitlich unbegrenzt den Kontakten (2) zugeführt werden. Es können auch kurzzeitige Span nungspulse angelegt werden, wie es zu Anspruch 1 beschrieben ist.The connection of an electronic circuit ( 11 ) with the contacts th ( 2 ) is described. The circuit ( 11 ) is located in the chip card and gains energy from the alternating field of the coil ( 4 ). Part of this energy is applied by the electronics ( 11 ) to one or more of the contacts ( 2 ) for the purpose of contactless transmission of information. The energy can be obtained from an oscillating circuit and can thus be supplied to the contacts ( 2 ) indefinitely. Short-term voltage pulses can also be applied, as described for claim 1.
Es wird ein Kondensator (3) in der Karte oder in einem Teil der Schaltung (11) beschrieben, der als Energiespeicher und als Entladungskondensator dient. Zum Speichern von Energie wird der Kondensator (3) per elektro nisch gesteuerter Schalter (8) an die Kontakte der Schaltung (11) ange schlossen. In der Schaltung (11) kann beispielsweise eine Gleichrichter schaltung vorhanden sein, welche aus den Wechselspannungen an den Spulenausgängen (4) eine Gleichspannung gewinnt. Diese Gleichspan nung kann zum Laden des Kondensators (3) über die Kontakte (7) benutzt werden. Durch die Nutzung eines Kondensators zur Energiespeicherung kann die Ladungsmenge (gemäß der Kapazität des Kondensators) erhöht werden, welche zur kontaktfreien Übertragung von Information genutzt wird. Die Information kann über die Kontakte (2) oder die Spule (4) in ei nem offenen Schwingkreis abgestrahlt werden.A capacitor ( 3 ) in the card or in a part of the circuit ( 11 ) is described, which serves as an energy store and as a discharge capacitor. To store energy, the capacitor ( 3 ) is connected to the contacts of the circuit ( 11 ) by means of an electronically controlled switch ( 8 ). In the circuit ( 11 ), for example, a rectifier circuit can be present, which gains a DC voltage from the AC voltages at the coil outputs ( 4 ). This DC voltage can be used to charge the capacitor ( 3 ) via the contacts ( 7 ). By using a capacitor for energy storage, the amount of charge (according to the capacitance of the capacitor) can be increased, which is used for the contactless transmission of information. The information can be emitted via the contacts ( 2 ) or the coil ( 4 ) in an open resonant circuit.
Es wird beschrieben, wie die Spule (4) an ihren Ausgängen (10) wie ein Spannungstransformator zum Vervielfachen einer an den Kontakten (6) angelegten, zeitlich veränderlichen Spannung wirkt. Diese vervielfachte Spannung wird zur Erhöhung der Leistungsfähigkeit einer kontaktfreien Übertragung genutzt wird. Die Schaltung (11) schließt den Kondensator (3) an Teile der Spule (4) über die Kontakte (6) an. Der dadurch erzeugte Kurzschlußstrom des Kondensators (3) in einem Teil der Spule (4) führt zu induzierten Spannungen in den anderen Teilen der Spule. Das Verhältnis der Anzahl der Windungen in der Teilspule mit ihren Kontakten (6) zu der Anzahl der Windungen in der Spule (4) bestimmt die Erhöhung der Span nung an den Spulenausgängen (10). Die vom Kondensator (3) an den Kontakten (6) angelegte Spannung liegt nach einer Verzögerungszeit ver größert an den Ausgängen (10) der Spule (4) an. Die Schaltung (11) steu ert das wahlweise Verbinden des Kondensators zum Nachladen über die Kontakte (7) oder zum Entladen über die Kontakte (6).It is described how the coil ( 4 ) acts at its outputs ( 10 ) like a voltage transformer for multiplying a time-varying voltage applied to the contacts ( 6 ). This multiplied voltage is used to increase the performance of a contactless transmission. The circuit ( 11 ) connects the capacitor ( 3 ) to parts of the coil ( 4 ) via the contacts ( 6 ). The resulting short-circuit current of the capacitor ( 3 ) in one part of the coil ( 4 ) leads to induced voltages in the other parts of the coil. The ratio of the number of turns in the partial coil with its contacts ( 6 ) to the number of turns in the coil ( 4 ) determines the increase in the voltage at the coil outputs ( 10 ). The voltage applied by the capacitor ( 3 ) to the contacts ( 6 ) is increased after a delay time at the outputs ( 10 ) of the coil ( 4 ). The circuit ( 11 ) controls the optional connection of the capacitor for recharging via the contacts ( 7 ) or for discharging via the contacts ( 6 ).
Es wird beschrieben, wie die Zeitpunkte des kontaktfreien Übertragens von Informationen von der Chipkarte zu einem Leser bestimmt werden. Die Zeitpunkte sind identisch mit denen, welche standardisierte Chipkarten nach genormtem Verfahren zum kontaktfreien Übertragen von Information von der Karte zum Leser nutzen. Damit ergibt sich der Vorteil, daß eine in der Karte erzeugte kontaktfreie, standardisierte Übertragung vorm Informa tionen auch gleichzeitig Informationen nach den vorstehenden Ansprüchen erzeugt. Eine Karte gemäß den Ansprüchen kann also in Übereinstimmung mit dem internationalen Standard aufgebaut sein und zusätzlich Informa tionen gemäß den Patentansprüchen übertragen. Durch die Nutzung des Standards wird auch der Aufbau von Geräten zum Empfangen der kontakt frei übertragenen Information vereinfacht.It describes how the times of contactless transmission of Information from the smart card to a reader can be determined. The Time points are identical to those, which standardized chip cards according to a standardized procedure for the contact-free transmission of information from the card to the reader. This has the advantage that an in contact-free, standardized transmission of the card in front of the informa tion at the same time information according to the preceding claims generated. A card according to the claims can therefore be in agreement be built with the international standard and additional informa tion transferred according to the claims. By using the Standards will also include building devices to receive contact freely transmitted information simplified.
Claims (5)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4443979A DE4443979C1 (en) | 1994-12-11 | 1994-12-11 | Chip card with contact surfaces and data exchange coils |
PCT/DE1995/001679 WO1996018973A1 (en) | 1994-12-11 | 1995-11-23 | Contactless chip card information transmission |
AU39774/95A AU3977495A (en) | 1994-12-11 | 1995-11-23 | Contactless chip card information transmission |
DE19581412T DE19581412D2 (en) | 1994-12-11 | 1995-11-23 | Contactless information transfer from chip cards |
EP95938347A EP0796476A1 (en) | 1994-12-11 | 1995-11-23 | Contactless chip card information transmission |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4443979A DE4443979C1 (en) | 1994-12-11 | 1994-12-11 | Chip card with contact surfaces and data exchange coils |
Publications (1)
Publication Number | Publication Date |
---|---|
DE4443979C1 true DE4443979C1 (en) | 1996-03-07 |
Family
ID=6535440
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE4443979A Expired - Fee Related DE4443979C1 (en) | 1994-12-11 | 1994-12-11 | Chip card with contact surfaces and data exchange coils |
DE19581412T Expired - Fee Related DE19581412D2 (en) | 1994-12-11 | 1995-11-23 | Contactless information transfer from chip cards |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19581412T Expired - Fee Related DE19581412D2 (en) | 1994-12-11 | 1995-11-23 | Contactless information transfer from chip cards |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0796476A1 (en) |
AU (1) | AU3977495A (en) |
DE (2) | DE4443979C1 (en) |
WO (1) | WO1996018973A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19723272A1 (en) * | 1996-06-04 | 1997-12-11 | Orga Kartensysteme Gmbh | Electronic chip card with microcomputer |
DE19637964A1 (en) * | 1996-09-18 | 1998-03-19 | Diehl Ident Gmbh | Device for inductive high-frequency data exchange |
DE19847088A1 (en) * | 1998-10-13 | 2000-05-18 | Ksw Microtec Ges Fuer Angewand | Flat carrier for semiconductor chips and method for its production |
ES2251315A1 (en) * | 2004-10-14 | 2006-04-16 | Universidad Politecnica De Madrid | Low frequency transceiver system for use in e.g. entrances and exits includes smart card having magnetic core and winding to be turned ON or OFF to send information |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3935364C1 (en) * | 1989-10-24 | 1990-08-23 | Angewandte Digital Elektronik Gmbh, 2051 Brunstorf, De | |
NL9101608A (en) * | 1991-09-24 | 1993-04-16 | Nedap Nv | CHIP CARD WITH REMOTE IDENTIFICATION. |
-
1994
- 1994-12-11 DE DE4443979A patent/DE4443979C1/en not_active Expired - Fee Related
-
1995
- 1995-11-23 AU AU39774/95A patent/AU3977495A/en not_active Abandoned
- 1995-11-23 DE DE19581412T patent/DE19581412D2/en not_active Expired - Fee Related
- 1995-11-23 WO PCT/DE1995/001679 patent/WO1996018973A1/en not_active Application Discontinuation
- 1995-11-23 EP EP95938347A patent/EP0796476A1/en not_active Withdrawn
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19723272A1 (en) * | 1996-06-04 | 1997-12-11 | Orga Kartensysteme Gmbh | Electronic chip card with microcomputer |
DE19637964A1 (en) * | 1996-09-18 | 1998-03-19 | Diehl Ident Gmbh | Device for inductive high-frequency data exchange |
DE19847088A1 (en) * | 1998-10-13 | 2000-05-18 | Ksw Microtec Ges Fuer Angewand | Flat carrier for semiconductor chips and method for its production |
ES2251315A1 (en) * | 2004-10-14 | 2006-04-16 | Universidad Politecnica De Madrid | Low frequency transceiver system for use in e.g. entrances and exits includes smart card having magnetic core and winding to be turned ON or OFF to send information |
Also Published As
Publication number | Publication date |
---|---|
EP0796476A1 (en) | 1997-09-24 |
AU3977495A (en) | 1996-07-03 |
DE19581412D2 (en) | 1998-02-05 |
WO1996018973A1 (en) | 1996-06-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8100 | Publication of the examined application without publication of unexamined application | ||
D1 | Grant (no unexamined application published) patent law 81 | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |