WO2015163836A1 - Paybeam system for inductively transmitting digital data - Google Patents

Paybeam system for inductively transmitting digital data Download PDF

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Publication number
WO2015163836A1
WO2015163836A1 PCT/UA2014/000080 UA2014000080W WO2015163836A1 WO 2015163836 A1 WO2015163836 A1 WO 2015163836A1 UA 2014000080 W UA2014000080 W UA 2014000080W WO 2015163836 A1 WO2015163836 A1 WO 2015163836A1
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Prior art keywords
system
digital data
pos
characterized
device
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PCT/UA2014/000080
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French (fr)
Russian (ru)
Inventor
Алексей Анатольевич МАРЦЕНЮК-КУХАРУК
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Алексей Анатольевич МАРЦЕНЮК-КУХАРУК
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Priority to UA2014004233 priority Critical
Priority to UAa201404233 priority
Application filed by Алексей Анатольевич МАРЦЕНЮК-КУХАРУК filed Critical Алексей Анатольевич МАРЦЕНЮК-КУХАРУК
Publication of WO2015163836A1 publication Critical patent/WO2015163836A1/en

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    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06QDATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTING PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTING PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00Payment architectures, schemes or protocols
    • G06Q20/04Payment circuits
    • G06Q20/06Private payment circuits, e.g. involving electronic currency used among participants of a common payment scheme
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B5/00Near-field transmission systems, e.g. inductive loop type

Abstract

A system for inductively transmitting digital data contains a device for inductively transmitting digital data, a receiving device in the form of a magnetic head of a reader, a computer system, and/or communications systems, and also a device for connecting to the aforementioned systems. The device for inductively transmitting digital data contains an emitter driver and an inductor in the form of an inductive coil of an emitter, and also a signal synthesizer. The signal synthesizer contains a real-time computer microsystem or a delayed command processing microsystem, and an interfacing device, and is connected to the emitter driver. The emitter driver is connected to the inductor and is capable of switching the polarity of the power supply voltage applied to the inductive coil of the emitter. The inductive coil is capable of transmitting digital data to the receiving device over a distance of up to 30 cm while simultaneously amplifying the current in the inductor, or without such amplification. The computer system, having software installed therein, contactlessly transmits corresponding information, by means of the device for inductively transmitting digital data, to a card reader device without physically using a card with a magnetic strip when transmitting data.

Description

DIGITAL DATA COMMUNICATION SYSTEMS inductive method PAYBEAM

TECHNICAL FIELD

The invention relates to electronic systems (electronic devices), carrying out transmission of digital data, as well as payment instruments and data instruments, and is adapted to transmit digital data, such as billing information, a smartphone or other electronic device via a digital data transmission apparatus inductive method in POS- terminal.

In the description below the following notation is used (determination).

MST (English -. Magnetic security transaction) - safety magnetic transaction.

ILC - magnetic stripe cards. Produced in accordance with ISO / IEC 7810 standard, ISOtfEC 781 1, ISO IEC 7812, ISO / IEC 7813, ISO 8583 and ISO / IEC 4909.

Payment card - card with a magnetic strip, which is designed for use in payment systems.

issue of bank cards - activities for the production of bank cards, account opening and settlement and cash services to clients in the implementation of operations with use of bank cards issued to them.

Emulating - emulation process comprising inheritance behavior and characteristics of the emulated object.

Head reader or magnetic stripe reader (SMP) - the magnetic head.

Transfer - mathematical / geometric operation of moving objects on the grid without changing their spatial orientation.

Polarization - criterion characterizing dependence codirectional axes emitter inductance winding and a magnetic stripe reader (the angle between the axes at their parallel displacement) at the maximum distance stable signal reading therebetween.

Safe storage - storage, which prevents unauthorized access to them.

Sekyurny tool (English -. Security - security) - a tool designed to meet the requirements of safe storage and data transfer. Contactless data transmission - the transmission of information on the distance between two or more devices by which data is transmitted, and which does not require contact directly between the devices (e.g., between the inductive transmitter coil which transmits a signal, and a reader head which is in drive magnetic card reader).

Driver - constructive element or module for matching a control signal (from any source, capable of giving a command to the driver) and the payload, in particular an inductive transmitter coil.

Inductor - Inductive transmitter coil which transmits a signal.

f / 2f method (English -. double frequency) - digital signal modulation method described in standard WHEEL 781 1.

The quality factor - oscillatory system parameter, which defines the width of the resonance and which describes how many times the sum of the dynamic and supplies the stored energy in the system is greater than the energy loss per oscillation period.

Magnitoprovid - the part or set of parts designed for the passage of magnetic flux with certain of its losses.

The mid-point of consumption - the common wire (ground, zero). Referred to as the "medium" when used bipolar power systems.

Props - a set of digital data needed to identify the user in the system (payment, discount, security, authentication, etc.).

Multivibrator (signal synthesizer) - a device consisting of a resistor and the upper and lower order driver (boundary shoulder). Flicker is a mechanism for sequential switching of positive and negative (forward and reverse) current flow.

USB 2.0 (English -. Universal serial bus) - a serial communication interface for medium-speed and low-speed peripherals in computing. Version 2.0.

USBotg (English -. Universal serial bus on-the go) - the further expansion of USB 2.0 specification designed to facilitate connection of peripherals with each other USB-devices without having to connect to a personal computer (PC).

POS-terminal (English -. Point of sale - the point of sale) - electronic program-technical device for receiving payment of a plastic card which can receive the chip card module, magnetic stripe card and contactless, as well as other devices having contactless interface.

bpi (Engl -. bit per inch) - a digital data recording density.

one-time-pin - a one-time unique PIN code.

LRC (Engl -. Longitudinal redundancy check) - longitudinal redundancy check.

Termination - auxiliary closure lowercase feature data.

Ν-bit encoding - the interpretation of the bit sequence, where N denotes the number of bits that is divided in the flow for interpreting a data stream elements. Typically, the number of bits in the sequence must be a multiple of N, or the data (the remainder of the division) are discarded.

EMF - electromotive force.

Sensing distance - distance between the transmitter and the receiver (detector), at which the stable data transmission.

H-Bridge - an electronic circuit that makes it possible to apply a voltage to the load in different directions.

Software (SW) - a sequence of instructions, implemented in the form of a command execution environment intended for the operation of computer systems, and implementing the tasks, as well as the developed algorithms.

Frame (Engl frame.) - indivisible information volume describing the state in which the inductive coil must be emitter.

Current frame (English -. Current frame) - frame, which is currently read by the driver. Based on the information obtained from the frame, the driver sets the transmitter to the appropriate mode.

NFC (Engl -. Near field communication, near field communication) - the high-frequency wireless communication technology is a short-range, which enables communication between devices located at a distance of about 10 centimeters.

Transponder - receiver-transmitter device sends a signal in response to the received signal.

RFID (Engl -. Radio frequency identification, RFID) - Method of automatic identification of objects, wherein by means of radio signals are read or written data stored in the transponders or tags RFID-.

Payment information - information that stores the second track (track 2). According ISOAEC 7813, this information is needed for the transaction via POS-terminal.

Bank / shop / institution - the organization responsible for conducting the emission of cards containing digital information.

Computer system - smartphone, phone, tablet, personal computer, and other electronic gadgets, etc.

BACKGROUND ART

To date, the technology market, there are many electronic devices which transfer data, payment instruments, access control systems, identification systems, and methods of cash management services, authentication methods in accounting systems, and others.

Such tools include magnetic stripe cards (ILC), containing, inter alia, payment card data. By paying the Commission include, among others, credit, debit, gift cards and discount cards. Data "written" on the magnetic stripe of the card by means of alternation of the magnetization of the particles embedded in the magnetic strip.

Payment card data read from the magnetic stripe of a POS-terminal, by passing the card through a magnetic card reader (via kartopriemochnuyu gap). Apparatus for reading magnetic cards comprises reading head and the associated decoding circuits. When a magnetic card is moved through a magnetic stripe reader (through the slit kartopriemochnuyu), its magnetic stripe passes in front of the reading head.

When moving the reading head with respect to the magnetic strip which is equipped with magnetic domains of alternating polarity, generates a fluctuating magnetic field in the gap of the reading head. The read head makes it a pulsed magnetic field into an equivalent electrical signal.

decoder scheme amplifies and digitizes the electrical signal, reproducing the same data stream that was recorded (i.e., has been embedded at the time of recording) on ​​a magnetic strip card. Magnetic stripe encoding is described in the international standard ISO 1 781 and ISO 7813. With the increasing popularity and capabilities gadgets, such as smartphones, growing desire to use them as the mobile wallet, and also to use them to make payments at retail outlets without using a plurality of payment kart. A key obstacle to the adoption of such a decision was the lack of a data link between mobile phones (smatrfonami) and POS-terminals.

In this regard, several alternatives have been proposed. These include the manual set data for transmission to the POS-declaration by a subsequent, 2D barcodes displayed on the screen and readable by devices for reading 2D bar codes, RFID, which are attached to telephones and are embedded in their hardware for the implementation of near contactless communication (ACS), triggered by a phone application.

Of these methods, 2D bar codes and BBS are the most promising. They have a wide range of reception, but there is no possibility of their wide practical use due to lack of corresponding readers in retail outlets. And in the case of the BBC should also cite the lack of standardized possibilities of using ACS in many smartphones.

Accordingly, there exists a need for improved devices and methods for transmitting payment card data and other digital information from the smartphone or other electronic device, remotely on a POS-terminal or other magnetic card reader.

Known emulator magnetic stripe payment card (card for the transaction) according to the patent US 4,791,283 [1], [Transaction card magnetic stripe emulator (emulator magnetic stripe payment card (card for the transaction). US Patent 4,791,283. G06K7 / 08 IPC. Application US 870,005. appl. 03.06.1986. Publ. 13.12.1988]. a device [1] is designed to transfer data from a processor disposed in the card, which emulates the normal (credit or debit) ILC. The data are serially transmitted from the processor to the magnetic field generators, which emulate the previously recorded data on the mage netic strip conventional card. This allows data transfer from the microprocessor to a standard card reader without requiring a significant change-Card reader (card reader). The scheme used for determining the position and speed of the card through the card reader to ensure transmission of data from the microprocessor to a magnetic field generator within the time of scanning the card head card reader.

Disadvantages device [1] as follows.

1. A device [1] is exclusively contact. The negative consequences of this - the mechanical wear and contamination of the read head.

2. A device [1] configured in the form factor card. A negative consequence of this disadvantage may be use, as

the device is easy to lose, as well as mechanical damage.

3. In the arrangement [1], there is need for detection readhead. The negative consequence of this is the possibility of false (idle) positives. It also complicates the design of the device and reduces the life of the card without reloading.

4. In the arrangement [1], the information pre-recorded on the device in the form factor cards, i.e. recorded data can be read without authorization. This creates a problem of information security threats, that is, information can be read directly from the device. There is also no mechanism for removing the recorded data in the event of card loss.

5. In the apparatus [1] does not have to implement the function quickly add new information. The negative consequences of this is a significant increase in time, inability to extend or replace data in it [1].

6. In the arrangement [1] software and hardware function is not implemented one-time-pin. The negative consequences of this may be the lack of additional protection (due to the use of the same PIN-code) for each use of the device.

Also known payment card and the method according to the patent application WO

2013181281 [2], [Payment card and methods (payment card and Methods). Publication WO2013181281 applications. IPC G06K 19/07 (2006.01). Publication date 05/12/2013. Priority date: 29.05.2012]. Payment card according to [2] comprises a magnetic stripe emulator and a set of "keys" - areas on the payment card surface. By pressing a "button" held its authentication as an access code, and activation of the payment function of the magnetic stripe emulator. The payment card comprises a receiver-transmitter (interface unit) for wireless communication with a mobile device (phone, tablet). It is assumed suppression payment function of the magnetic stripe emulator in response to a failure of the wireless communication with the mobile device.

Payment card according to [2] may include RFID and NFC emulators. Processor and emulator can be head ILC reader. This processor controls a set of electromagnetic coils through the driver coils according to the position and / or velocity (i.e. speed and direction) of the magnetic head with respect to bands emulator when the payment card passes through a magnetic card reader.

Disadvantages apparatus [2] are as follows.

1. A device [2] is strictly a contact. The negative consequences of the mechanical wear and contamination of the read head.

2. A device [2] is made in the form factor card. A negative consequence of this may be an inconvenience of use, since the device is easy to lose, as well as mechanical damage.

3. In the apparatus [2] provide for the need of detecting the read head and the card transport speed. The negative consequence of this is the possibility of false (idle) positives. This also complicates the design of the device, which reduces the service life without recharging.

4. In the apparatus [2] is not implemented by hardware and software function one-time-pin. A negative consequence of this may be the lack of additional protection (due to the use of the same PIN-code) for each use.

Also known is a system and method of dynamic magnetic stripe communication devices of the driving circuit according to the patent application WO 201 1 103160 [3], [Systems and methods for drive circuits for dynamic magnetic stripe communications devices (system and method of the driving circuit of the dynamic magnetic strip communication devices). Application Publication WO 103160. 1 201 MP G06K 19/07 (2006.01). Publication date 25.08.201 1. Priority date: 16.02.2010]. Emulator magnetic system band includes a coil and a coil driver. The driver provides for obtaining different waveform. Obtaining expected signal frequency double - double- frequency (f / 2f).

Disadvantages unit [3] are as follows.

1. A device [3] is a contact card reader. The negative consequences of this - the mechanical wear and contamination of the read head. 2. A device [3] is made in card form factor. A negative consequence of this may be an inconvenience of use, because the device is easy to lose, mechanical damage.

3. The device [3] is programmed necessity detection readhead. The negative consequence of this is the possibility of false

(Idle) positives.

As the closest analog (prototype) Set US patent 8,628,012 [4], [System and method for a baseband nearfield magentic stripe data transmitter (system and method of the transmitter data bandwidth of the near field magnetic strip). Patent US 8628012. IPC G06K7 / 08 (2006.01). Publication date 01/14/2014. Priority date: 20.01.2013], which describes a system and method of the transmitter data bandwidth of the near field magnetic MST band which transmit payment card data from the smartphone or other electronic device in POS- terminal to conduct transactions.

A device operating on the basis of the method MST, includes a driver and an inductor. A device operating on the basis of the method MST, receives data from the magnetic stripe that contain payment card data, processes the received data from the magnetic strip and generating magnetic pulses of high power, comprising the processed data to a magnetic strip, which can then be obtained by using for reading the magnetic card reader a POS-terminal.

Disadvantages closest analog (prototype) are as follows. Firstly, the implementation of data transfer via the system may remotely on a limited distance in the range of 1 to 2 inches, as measured between the device transmitting the signal formed in the form of an inductor (coil arrangement, which transmits the signal) and the detector (a device which receives a signal), designed as a reader head which is in the magnetic card reader device.

This "hard" limit on the distance between the transmission device and reception digital signal is due to the fact that between the two (i.e. less than 1 inch) of the inductor power is too large for a smaller distance. This leads to a magnetizable core head and / or excessive signal amplitude, which in turn is the cause of degradation of the input stage amplifier / detector. For greater distances between these devices (i.e., 2 inches) of the inductor current design is not conducive to unambiguous interpretation inductor transmitted signal. The consequence of this is noisy. Also, when this is not determined by the magnetic field distribution in the space and on good data.

Second, the implementation of technology (method), and the device is powered by MST method, the possibility of preserving the memory after the power is turned off to store credit card data and other personal information. This characteristic technical solutions nesekyurna as preservation of information may lead its unauthorized (illegal) use of third parties.

Third, when implementing MST technology uses a coil inductor with a quality factor ranging from 10 mkmN / ohms to 80 mkmN / ohms. A consequence of the above high value of the quality factor of the inductor coil is its high reactivity thereby generates extraneous electromagnetic oscillations. This results in a signal to noise and makes it difficult to interpret data produced by the decoder, which is in the card reader. Payment extraneous vibrations leads to an increased (by at least 15%) of electric power consumption.

Also due to the high Q factor of the inductor coil to maintain the desired ratio between the useful signal and the noise signal must provide increased radiation power. This in turn leads to the core of magnetization reversal reader heads, so that an intensive magnetic head wear.

Fourthly, a device operating on the basis of MST technology, additionally equipped with a magnetic strip reader head (media) for the possibility of obtaining a magnetic stripe card and data for further use. The presence of the magnetic stripe reader heads may facilitate unauthorized copying (use) and / or unauthorized transfer of stored data stored on the magnetic strip.

Fifthly, the alarm device operating according to the MST method, due to the high transmission power may be registered devices, including not intended for recording magnetic signals (e.g., an electret microphone). The negative consequences of this is the possibility of extraneous data reading and unauthorized information.

Sixthly, a device [4] The hardware and software is not implemented the function one- time-pin. A negative consequence of this may be the lack of additional protection (due to the use of the same PIN-code) for each use.

The basis of the invention is to create a compact and versatile apparatus for secure and reliable transmission of digital data on large compared to the existing values ​​of the distance, according to applicable international digital transmission standards, the first payment data or other information, as well as for payment , without the physical presence of a magnetic card that is compatible with modern computing and communications systems such as mobile phones, smart phones, tablet, or other electronic devices remotely on the reader of magnetic cards, by effectively of embodiment constituting the device elements and their relative positions, having effective connections between them, as well as the device elements of effective materials that will promote the portability of the design and improved energy and economic performance of the device, and will provide a safe and reliable transmission of digital data and sodeyst Vova providing the user with full control over the transactions produced, as well as lead to the simplicity and user-friendliness of service, especially for payments using a smartphone (phone, tablet, etc.).

DISCLOSURE OF THE INVENTION.

Said technical problem is solved in that in the digital data transmission system inductively Paybeam, which contains the digital data transmission apparatus inductive method (13), for example, the data contained on the payment card, smartphone or other electronic device to a receiving device (14) for example, a POS-terminal to conduct transactions, the computer system (12), for example as a computer, mobile phone, smart phone, tablet, or other electronic devices and / or communications systems, and connection apparatus with the above systems, the digital data transmission apparatus inductive method (13) comprises a radiator driver (6) and an inductor configured as an inductive transmitter coil (2), new is the fact that, in inductively transfer apparatus (13) put signal synthesizer (pos. 5) which contains a real-time processing microsystem or microsystem Unprocessed commands and the interface device (4), wherein the signal synthesizer (pos. 5) coupled to the driver oscillator (6) which is connected to the inductor and configured as, with, and without the possibility of switching polarity of voltage applied to the inductive coil of the transmitter (2) which is arranged to transmit digital data to the receiving device a magnetic head reader (1) at a distance of 30 cm in the absence of the material carrier transmitted digital data, while the current gain in the inductor, or without such reinforcement.

Computer micro real time signal synthesizer (5) is arranged to exclude the computational load balancing.

Computer micro real time signal synthesizer (5) is arranged to sequentially set the value of the current frame signal at the terminals of two-bit digital bus frequency reproducing signal in the range from 0 Hz to 4 KHz.

As emitter driver (6), the system comprises a high-frequency switch to a midpoint consumption and stabilization of the voltage midpoint consumption relative to the upper and lower feeding points.

The interface device (4) with computing and communication systems (12) adapted to transmit data and control digital data transmission device commands inductively (13) and to check the state of the device (13).

The interface device (4) with computing and communication systems (12) arranged to maintain the standard data transmission techniques such as, e.g., Bluetooth, UART, RS232, USB, wi-fi, and others.

The interface device (4) is in the form of buttons or switches modes.

The flat core (18), an inductive transmitter coil (2) is made of magnetically neutral or magnetically conductive material.

The flat core (18) of the inductor (2) is oblong rectangular.

The flat core (18), an inductive transmitter coil (2) is oblong rectangular cross-section with rounded edges, or a cross section in the form of polygonal faces.

Winding inductive transmitter coil (2) is made of a conductive material insulated from each winding of adjacent coils.

A digital data transmission apparatus inductive method (13) is adapted to simulate one audio track number (track 1).

A digital data transmission apparatus inductive method (13) arranged to simulate a single track number 2 (track 2) containing billing information necessary when performing payment transactions.

A digital data transmission apparatus inductive method (13) arranged to simulate a single track number 3 (track 3).

A digital data transmission apparatus inductive method (13) formed as a lining to the electronic device.

A digital data transmission apparatus inductive method (13) is designed as a protective cover to the electronic device.

A digital data transmission apparatus inductive method (13) is designed as a key fob.

A digital data transmission apparatus inductive method (13) is designed as a bracelet.

Inductive transmitter coil (2) is provided with a quality factor in the range of 0.0001 to 1200 μΗ / Ohm.

Inductive transmitter coil (2) is provided with a disordered stacking of coils.

Inductive transmitter coil (2) is provided with an ordered stacking of coils.

The computer system (12), such as a mobile device provided with software (17), implemented on the basis of the secure storage algorithm details (16).

Software (17) is implemented on the basis of authorization and identification algorithm. The computer system (12) and the bank host system (15), software and hardware are designed to simultaneously implement the service one-time-pin in the implementation of the algorithm encryption functions.

A digital data transmission apparatus inductive method (13) adapted to generate a signal when switching polarity.

Transmitter driver (6) is formed by an H-bridge.

service elements are one-time-pin located on a computer system (12) and the host system (15) of the bank.

These features of the device are the essence of the technical solution. Existence of a causal link between the combination of essential features and technical solutions are achieved technical result is as follows.

State of the art allows for electronic transactions by various methods implemented on the basis of different base units. However, in most cases of the transaction depends on the method chosen method or type of transaction (e.g., transaction using payment cards, payment for parking on parking prepaid account et al.).

The most commonly used method is the payment card (magnetic or microprocessor). The most popular system of payment cards at this stage of economic development are Visa, MasterCard and American Express.

specific bank account is allocated to a payment card. Accordingly, the funds available for this payment card, can only be in one place. The existence of a large number of accounts in financial institutions leads to the necessity of using other cards, it is often inconvenient and dangerous for custom maps.

The proposed solution provides the ability to use several different accounts with the help of storage and use virtual account details, as well as the use of other digital information that can be stored on a magnetic stripe card and transmitted to the card reader. Thus, the funds can be accessed simultaneously from multiple client accounts and do not require retrofitting of existing payment systems on the basis of maps. The solution of these technical problems can be used to transmit payment information necessary for payment, cashless transactions, and also to transmit other digital data.

The advantages of the proposed technical solution is the possibility of universal transmission of digital data, including transmission of billing for payment by means of devices equipped with magnetic card readers, and without the physical presence of such cards in the client, and therefore, without the use of cards in the apparatus reading magnetic cards.

This makes it possible not to conduct feed cards (including payment cards) or to carry a plurality of maps (including billing), and also promotes the convenience implementation as a payment, and transmitting digital information in general.

Data transmission via the proposed technical solutions is safe because the device does not store a billing information, and the information is transmitted in a secure area on the secure channel. This prevents unauthorized access and / or use of information. Also, in the inventive system has a function of one-time-pin, which promotes information security, even in the event of unauthorized access to payment data, by using a unique pin-code (every time a new one) each time a new data transfer.

BRIEF DESCRIPTION OF DRAWINGS

The technical solution is illustrated in FIG. 1 - FIG. 5, where:

FIG. 1 illustrates a conventional transmission circuit and receiving signals from the coil to inductively read head, and the conditional distribution of the field lines in the region of the head;

FIG. 2 illustrates a digital data transmission device by an inductive circuit;

FIG. 3 depicts connection and interaction of the components of the claimed system operating on the basis of the described method, a reader of cards with a magnetic strip;

FIG. 4 shows the life cycle and accompanying elements of the claimed system operating on the basis of the described process (i.e., from card issue and to data);

FIG. 5 is a structure diagram of the read head and an inductive transmitter coil structure and orientation of the inductive radiator coil at the time of data transmission.

FIG. 1 oval lines shown in the conditional distribution of magnetic field lines in the magnetic head (pos. 3).

FIG. 3 by the dashed lines indicate the winding axis of the emitter coil

(Pos. 10) and the coil of the read head (Pos. 8).

FIG. 1 - FIG. 5 the following notations: 1 - readhead (reader component); 2 - inductive radiator coil; 3 - spatial distribution of magnetic field lines in the magnetic head; 4 - the coupling device; 5 - signal synthesizer; 6 - the driver of the radiator; 7 - the reader, the reading core member; 8 - coil winding axis of the read head; 9 - readhead gap; 10 - winding axis inductive coil; 11 - layout when the signal transmission (. 1 pos 1 includes a key 2, and key 10 as well as key 1, key position 7 and 8....); 12 - communication or computer system with installed software; 13 - the digital data transmission apparatus inductive method; 14 - the receiving device (e.g., POS- terminal); 15 - an entity (bank / shop / office); 16 - details; 17 - software installed on a computer system (12); 18 - core inductive radiator coil; 19 - constructive inductance reader magnetic head.

Best Embodiment

A digital data transmission system inductive method is based on the digital data transmission apparatus inductive method (pos. 13). An apparatus (13), in turn, consists of an inductive transmitter coil (pos. 2), the emitter driver (pos. 6), the signal synthesizer (Pos. 5), the coupling device (pos. 4) computing (PC, mobile phone , smart phone, tablet, etc.) and / or communication systems (pos. 12).

Inductive transmitter coil (transducer) (pos. 2) has the following features. Flat radiator core inductive coil (pos. 18 in FIG. 5) is made of magnetically neutral or magnetically conductive material and acts as a fixing frame conductor. The core has an elongated rectangular shape. Allowed to form core with rounded or truncated cross-sectional faces. Winding the inductive radiator coil (pos. 2) made of a conductive material insulated from each winding of adjacent coils. Also, for example, air layer can act as an insulator at a considerable potential difference, which is less than 2 kV / mm (at a relative humidity less than 50%).

In operation, the inductive radiator coil (pos. 2) of the magnetic gradient field has the same direction length (winding direction) of the radiator (pos. 3 in FIG. 1). Since the magnetic head (pos. 1) detects the magnetic field change (i.e., first derivative), for larger peak (burst signal) of the amplitude necessary to change the polarity of the front of the emitted signal sought to instant.

In this connection, the radiator driver (pos. 6) has the following features. To generate expression bursts and for pulling the front of the emitted signal during operation (pos. 13) using the method of the current polarity changes via the radiator (pos. 2) with the H-bridge. This leads to the doubling of the actual driver input voltage (pos. 6) at the terminals of the emitter, thereby increasing the range of the claimed stable actuation of means transmitting digital data inductive method.

Use as a high frequency switch driver also allowed (pos. 6 in FIG. 2) with an average consumer point and the midpoint voltage stabilization relative to the upper and lower feeding points. This is realized by the control means mikrovychislitelnoy system (Pos. 5).

Signal Synthesizer (Pos. 5) has the following features. It contains real time processing microsystem (micro-computer that uses an operating system and eliminating the computational load balancing) (pos. 5) which sequentially sets the frames of the current signal value at the terminals of two-bit digital bus (between pos. 5-6 in FIG. 2 ). reproduction signal frequency range from 0 Hz to 4 KHz.

Possible to use a single-bit bus (Figure 1 -.. Figure 5 is not shown) using a logical negation to control H-bridge (that is one embodiment of the synthesizer and matching drivers simulation auxiliary discharge). Thus, due to the potential difference of data transmission is realized accordingly. Reception of data and commands, preparation, radiation and a device control (pos. 13) is performed by a computer system (pos. 12).

The interface device (Pos. 4) with the computing or communication systems (pos. 12) has the following features. It is capable of transmitting data and commands digital data transmission apparatus inductive method (pos. 13) and with the possibility of interrogation (check) the state of the digital data transmission apparatus inductive method (pos. 13). The message can be implemented using standard communication techniques such as Bluetooth, UART, RS232, USB, etc.

In the case where the billing information is not expandable, i.e. priori established by the manufacturer and are not intended to be added or modified during operation, or digital data transmission apparatus inductive method (pos. 13) must be operated without the aid of extraneous control devices, the interface device (pos. 4) may be in the form of buttons and switches modes .

Using (according to ISO / IEC 7810, the wheel 7811, ISO / IEC 7812, the wheel 7813 standards, ISO 8583 and the wheel 4909) of digital data transmission apparatus inductive method (pos. 13) realized a stable reading of information by reading card emulation (ILC) using a card reader (for example, pOS-terminals) (pos. 14), security cards, discount, promotions, coupon, etc.

The maximum operational distance between transmitter inductive coil (Pos. 2) and a magnetic head reader (pos. 1) is up to 30 cm (i.e., about 12 inches) instead of 2.1 inches, as in the device closest analogue (prototype) [4].

Due to use of the ILC in payment systems, digital data transmission apparatus inductive method (pos. 13) is used for transmitting digital information, including payment information required to perform cashless payment transactions.

The interface device (pos. 4), being connected to a computer or communications system (position 12), is identified as a serial port (RS232 standard, UART), which is produced using the transfer of commands and data in the digital data transmission apparatus inductive method (pos. 13). The user interface application (running on a computing system, e.g., smartphone, phone, tablet, etc. (1 - 5, not shown) selects what information (that is loaded and to be transmitted) it will use. whereupon the computing system (pos. 12 in FIG. 3) transmits data to the computing microsystem (pos. 5).

The interface device (pos. 4) transmits the received data synthesizer signal (Pos. 5), whereupon the data are checked for integrity and prepared (converted into a sequence of frames) to radiation inductive radiator coil (pos. 2) in the card reader with the magnetic strip ( pos. 14).

After preparation of the data signal synthesizer (item 5) sends a driver oscillator (pos. 6) a signal that allows the power source of electricity. Signal Synthesizer (item 5) successively lists and transmits the available memory in frames, which have been converted on the basis of data transmitted in the signal synthesizer (item 5) from the computing system (item 12) with a fixed time delay set by the method of coding C21 " .

After the end of transmission data signal synthesizer (item 5) transmits the prohibiting signal to the driver radiator (pos. 6), whereby the emitter driver stops power supply (pos. 6) and the child devices (i.e. inductive transmitter coil) (pos. 2 ) and its related modules (ie all child objects).

Based on the input received from the signal synthesizer (item 5) emitter driver (item 6) generates a signal with well-defined rising and falling edges of a signal which emits inductive coil connected emitter (pos. 2). In fact (pos. 13) a message signal from the device occurs at all three reader (pos. 7).

interpreting signals to three tracks requirement (according to ISO 7811, ISO 7813) differ (track 1/2/3):

• Track number one (track 1) has a density of 210 bpi, 7-bit alphanumeric code;

· Track number two (track 2) has a density of 75 bpi, 5-digit numerical code;

• Track number three (track 3) has a density of 210 bpi, 5-digit numerical code. The proposed technical solution, it is possible to notice only one signal path ednorazovo, based on the difference in density and bit coding of each track.

Each track (track 1/2/3) terminated checksum LRC.

In digital data transmission apparatus inductive method (pos. 13) once emulated only one track containing data to be transmitted. The two other paths are discarded from the reading process because not tested data integrity Ν-bit encoding and LRC.

For example, to transfer billing information in the digital data transmission apparatus inductive method (pos. 13) is emulated track number 2 (track 2), which contains the necessary billing information.

Inductive transmitter coil (pos. 2) made of a magnetic wire or magnetic neutral core acting as frame exclusively for fixing the conductor (pos. 18 in FIG. 5) the inductive radiator coil (pos. 2).

Claimed digital data transmission apparatus inductive method (pos. 13) may be implemented as a supplement to the mobile telephones, smartphones, tablets, etc., as well as overlays to the electronic device in the form of a protective cover, a keychain, a bracelet, etc. .d.

Data transmission (including payment) via the digital data transmission apparatus inductive method (pos. 13) is performed at a distance between the sensor head card reader (e.g., POS-terminal) (pos.14) to the inductive radiator coil (Pos . 2) on average about 5-10 cm real possibility of data transmission range between the transceivers -. at a distance of 0 cm to 30 cm, depending upon the design of digital data reader (key 14)..

At the time of data transmission smartphone (phone, tablet, etc.) necessary to keep the gap substantially parallel to the card reader (e.g., POS- terminal) at the recommended distance of 5-10 cm. Do not move and rotate the device (pos.13) in data transfer time. That is, the shaft (. 10 pos) emitter coil (. 2 pos) should be positioned substantially parallel kartopriemochnoy slit (Figure 1 - Fig. 5 is not shown) of the card reader.

The card reading device (reader) is used readout magnetic head with three tracks (in accordance with ISO / IEC 7810). That is, in case the magnetic head reader (pos. 1 in FIG. 5) are three independent reader (pos. 7 to FIG. 5) for each track, which are arranged at a distance much smaller than the distance between the sensor head (Pos.1 ) and inductive radiator coil (pos. 2).

In the case of inductive data transmission distance between a reader (pos. 7) and the inductive radiator coil (pos. 2) it is much greater than the distance between the reader (pos. 7) in the readhead housing (pos. 1). To explain the physical process, assume that all three sensors (pos. 7) are at the same point and do not affect each other. Experimentally, it has been confirmed that the influence of the three sensors on each other is so small as to be negligible. Thus, confirmed the above assumption.

By reading head (pos. 1) is disposed in such a manner. The plane of the magnetic read head gap (. Pos 9) is oriented substantially perpendicular to the direction of movement of the magnetic strip (1 - 5 is not shown). Thus, the axis (. 8 pos) constructive inductor winding (. Pos 19) is substantially parallel to the feeding direction (10 pos.) The magnetic strip (1 - 5 is not shown).

Thus, when passing the magnetic strip (1 - 5 is not shown) in the head region of the gap (9 pos.) There is a change (gradient) of the magnetization. This creates a voltage in the inductor (pos. 19) reading head (1 pos.), Which is amplified by amplifier reader (1 - 5 is not indicated) and is passed on for further processing (decrypting).

That is, the magnetic reading head (pos. 1) detects a gradient magnetic field, and not its absolute value. Thus, to transmit a signal magnetic field you need to quickly change in the magnetic gap (pos. 9). This can be achieved at a considerable distance from the reading head (FIG. 1), using a more powerful source of magnetic signal than the magnetic tape, for example, an electromagnet.

The immediate physical model of our transmission system ( "head - emitter") is a "transformer". In fact, the magnetic head reader (Pos. 1) and the inductive radiator coil (pos. 2) in this transmission system is a transformer with unfavorable magnetic field transmission medium (due to the significant distances between windings "transformer" and the absence of general magnitoprovidnogo core (pos. 18). inductive coil (. 2 pos) acts as a primary winding, a magnetic head reader (1 pos.) - as a secondary winding.

As the standard ISO 7811 is encoded by ILC f / 2f method, which is a digital coding technique (i.e., signal in favor excessive turnover), it is sufficient to determine the characteristics of the signal which occurs based on the detection, identification and decoding of the digital signal.

It has been determined experimentally that a necessary and sufficient condition for decoding a digital signal is the presence of defined peaks with changing polarity, and a fixed interval between them depending on the value that is encoded (single frequency (f) for coding a logical zero and twice the frequency (2f) for coding logic one).

Given the specificity of the digital signal, there is no need to pass it in full, ie the full repetition of the waveform, the absence of noise and interference is not necessary. It should be significantly (for winding a magnetic head (item 1) to transfer the peaks of alternating polarity with fixed time intervals (i.e., perform coding 172G). This is achieved by sharp switching (almost instantaneous tending to) the polarity of voltage applied to the inductive emitter coil (pos. 2) with the corresponding current amplification.

Operating distance (actual successful transmission) of the digital signal depends on the magnetic field which is able to register a magnetic head (pos. 1) of the reader. Thus, the field that generates the emitter coil (pos. 3) should have a significant damping (gradient amplification) or field inhomogeneity to head (pos. 1) could detect the signal.

To increase the transmission sensing distance necessary a more intense field in the source (inductive radiator coil - 2 pos.). The maximum operating distance is determined by the power supply capacity and output requirements for weight and size characteristics.

Numerous experiments, as a result of which have been chosen exactly those elements essential differences transmission system as defined in the claims (utility model) of the claimed technical solutions have been conducted. In the course of experiments with different coils it has been determined that it is feasible to send the digital data at a distance from the inductive radiator coil (pos. 2) to the head gap (Pos. 9) of the reader to 30 cm.

Such a result could be achieved by using an inductive transmitter coil (2 pos.) With shaped magnetic core (core magnetically horseshoe configuration) (1 - 5 is not shown). This led to an increase in the local magnetic field strength. When this increase in quality could register the magnetic field intensity on circumstantial evidence (for fluctuations magnetically element in the gap of the radiator) and directional distribution of the field.

However, when transferring data via said coil with shaped yoke (1 - 5 is not shown) at a distance closer than 10 cm is the risk of damaging the readhead. Also, using the coil with a shaped magnetic circuit, it is necessary to use more powerful (about 60 W) power source.

Using said coil (with shaped yoke) increases the thickness of the device (at least 2 times in comparison with the present device) by increasing the power source, the coil size, coil cooling system (characteristics stabilization radiation) and electron binding considering characteristics (high power) .

Since one of the requirements for digital data transmission by inductive device (pos. 13) was presented compact size and low power consumption, the H-bridge used to double the effective voltage, which controls the inductive radiator coil (pos. 2).

To suppress the dynamic effects (hysteresis signal and delaying the front, the presence of harmonic oscillations due to inharmonious) in inductance inductive radiator coil (item 2) has been performed with low quality factor and magnetically neutral core (pos. 10). Coil prototype had a Q-factor of the inventive device less than 10 μΗ / Ohm.

Chaotic winding coil has been proposed to reduce the quality factor (i.e., disordered stacking turns). It was established experimentally that the increase in the inductive radiator coil length (pos. 2) leads to deterioration (in logarithmic) response range, and thickened (thickness 2 mm) cylindrical coil does not meet dimensional requirements. As a result, it was decided to use a flat coil with a winding axis parallel to the plane of the inductive transmitter coil arrangement (Pos. 2) ·

In connection with this constructive solution has been tentatively set to "polarization effect". It was the fact that at low energies radiation sensing distance was greater with predominantly parallel orientation of the axes of winding inductive radiator coil (Pos. 2) and the inductance (pos. 19) in the magnetic head (pos. 1).

In turn, with perpendicular arrangement of the axes of the coils of the reader (Pos. 8) and the radiator (pos. 10) reaches the lowest (already before failure in direct contact with the readhead) distance range, stable data transfer between the inductive radiator coil (Pos. 2) and reader (pos. 7).

With a significant (more than 5 W) increasing the radiation energy of the polarization effect has not been noticed. Considering the effect of polarization was reduced negative impact on the core (pos. 7) of the read head (pos. 1) which is not magnetized.

It was found that the noise signal (harmonics and noise magnetic medium) has little effect on the transmission of digital data since the magnetic field gradient produces a signal which is much stronger than the noise level, and which can be recorded less sensitive amplifiers and detectors.

The apparatus is used as follows.

The pot / facility / store (pos. 15) (FIG. 4 shows several key. Under the number 15 as embodiments of organizations that can assign data (emitters), such as a bank or a shop, etc.) is assigned credentials Users (pos. 16) (Figure 4 shows several key. under number 16, as a variant of details which, for example, assigned payment information, discount data or authorization systems).

For these details reader of magnetic cards (FIG. 4 shows several key. Under the number 14 as options for the card readers, for example, POS-terminal reader loyalty cards, check-point) (pos. 14) identifies the user that can gain access to funds that are in the client's account for payment (billing information), or, for example, to take advantage of existing discount program or authorization system. Requisites (pos. 16) are transmitted protected channel and stored in the protected area ON (key A 7) installed on the computer system (smart phone, tablet, etc.) that supports digital data transmission by inductive device (13 ).

Computer system (smartphone, phone, tablet, etc.) with the

PO (pos. 17) transmits the billing information to the digital data transmission apparatus inductive method (pos. 13).

A digital data transmission apparatus inductive method (pos. 13) transmits digital information to the card reader with the magnetic strip (pos. 19). transmitting digital data of the day the card reader with the magnetic strip uses information contained in the track 1 or in track2 or track3, since it can be emulated at the same time only one track.

For example, for the payment transaction, POS-terminal uses the information contained in track2 (according to ISO / IEC 7813 standard). A digital data transmission apparatus inductive method (pos. 13) transmits information in the form of a magnetic field oscillations, creating a signal in the read head (pos. 1) similar to the signal of the magnetic strip (1 5 not shown) payment card

(1 - 5 is not shown).

That is, other than payment information through a digital data transmission device is an inductive method (pos. 13), which is based on the corresponding digital data transmission method for an inductive method, can be transmitted to any digital information.

Thus, for the transmission of digital data via the digital data transmission apparatus inductive method (13), running on an appropriate method, including for payment transactions with POS- terminals, magnetic stripe cards are used. In this digital (including billing) information transmitted via the digital data transmission apparatus exclusively inductive method (pos. 13) with the computer system with installed (pos. 17).

In a computer system with installed (. 17 poses) can be written to several different data (details), for example, data for multiple accounts, various payment organizations, including banks. Before transmitting data, the user of the inventive device (1 -5 not shown) is to select the data (personal data) (e.g., count) to be transmitted (e.g., transfer will be made).

Computer system with installed (pos. 17) contains the authorization and identification system that provides safe storage and transmission of digital information. In this inductive method (pos. 13) of digital data transmission device itself does not store digital information, and serves only as a means of transmission. This makes it impossible to use digital (first payment) information by any other user, except for the authorized user.

Also claimed the system has a function of one-time-pin, which promotes information security, even in the event of unauthorized access to payment data.

The customer goes to organization authorized to produce emission map for obtaining information about the customer's account, which contains digital information and allow the transfer of data, for example, to carry out payment transactions in interaction with card readers, for example, POS- terminals.

The same information, including the client's account, of all the payment details, and other characteristics of the accounts to which the organization issuing records on magnetic stripe cards, sent over a secure channel to the (pos. 12) is a protected area of ​​the software on a computer system that interacts with digital data transmission apparatus inductive method (pos. 13).

The computer system with installed (pos. 17) passes through a digital data transmission apparatus inductive method (pos. 13) corresponding to (including billing) information on the contactless card reader (e.g., POS- terminal) without physical use of a card magnetic stripe data transmission (e.g., in the calculation).

industrial applicability

The advantages of the proposed technical solutions are:

· Absence of mechanical wear and magnetic reader head;

• low energy consumption (savings of 15% and higher) in comparison with the analogues and the prototype non-contact;

• the ability to work from USBotg; • providing normalized (optimized devoid of redundancy) output power, making it difficult to read extraneous data (ie, contributes to strengthening the security of transactions);

• ensuring minimization (i.e. reduction to the minimum required level) of energy consumption and the weight and size characteristics due to normalization of the radiation power;

• implementation synthesis solely required signal characteristics computing means microsystem;

• implementation of the control modules consumption in various operating modes device provides power savings and increases the lifetime of a single charge.

Another advantage of digital data transmission apparatus inductive method (pos. 13) is that it does not store a digital (including billing) information, whereby it is sekyurnim tool. A digital data transmission apparatus inductive method (pos. 13) also comprises a magnetic card reader, which is protected against unauthorized dissemination of information.

A digital data transmission apparatus inductive method (pos.13) composed of the same name of the system is portable, compact and energy efficient as compared with existing contactless analogues and the prototype. This allows you to use it as part of the standard USB2.0 and USBotg electricity consumption.

According to the power which is available to the consumer standards, it amounts to 2,5 W (5V, 0,5 A).

inductive digital transmission system (payment) data allows to dynamically generate data available computing / communication means for identification (payment) type systems POS-terminal.

Thus, the implementation of the claimed invention, which corresponds to the requirements and demands of the modern market, provides the ability to serve all types of transactions and the different types of payment accounts.

Claims

Claim
1. A digital data transmission system inductively Paybeam, which contains the digital data transmission apparatus inductive method (13), for example, the data contained on the payment card, smartphone or other electronic device to a receiving device (14), for example, in POS- terminal to conduct transactions, the computer system (12), for example as a computer, mobile phone, smart phone, tablet, or other electronic devices and / or communication systems as well as connection apparatus with the above systems s, wherein the digital data transmission apparatus inductive method (13) comprises a radiator driver (6) and an inductor configured as an inductive transmitter coil (2), characterized in that, in inductively transfer device (13) is introduced a signal synthesizer (Pos . 5) which contains a real-time processing microsystem or microsystem Unprocessed commands and the interface device (4), wherein the signal synthesizer (pos. 5) coupled to the driver oscillator (6) which is connected to the inductor and configured as, with, and without the possibility of switching polarity of voltage applied to the inductive coil of the transmitter (2) which is arranged to transmit digital data to the receiving device a magnetic head reader (1) at a distance of 30 cm in the absence of the material carrier transmitted digital data, while the current gain in the inductor, or without such reinforcement.
2. The system of claim 1, characterized in that micro computer real time signal synthesizer (5) is arranged to exclude the computational load balancing.
3. The system according to claim 2, characterized in that micro computer real time signal synthesizer (5) is arranged to sequentially set the value of the current signal frame at the terminals of two-bit digital bus with the frequency of the reproduction signal from 0 Hz to 4 KHz.
4. The system according to claim 1, characterized in that as transmitter driver (6), the system comprises a high-frequency switch to a midpoint consumption and stabilization of the voltage midpoint consumption relative to the upper and lower feeding points.
5. The system of claim 1, characterized in that the coupling device (4) with computing and communication systems (12) adapted to transmit data and control digital data transmission device commands inductively (13) and to check the state of the device (13).
6. The system according to claim 5, characterized in that the coupling device (4) with computing and communication systems (12) arranged to maintain the standard data transmission techniques such as, e.g., Bluetooth, U ART, RS232, USB, wi-fi and others.
7. The system of claim 5, characterized in that interface device (4) is in the form of buttons or switches modes.
8. The system of claim 1, wherein said flat core (18), an inductive transmitter coil (2) is made of magnetically neutral or magnetically conductive material.
9. The system of claim 8, wherein said flat core (18) of the inductor (2) is oblong rectangular.
10. The system of claim 8, wherein said flat core (18), an inductive transmitter coil (2) is oblong rectangular cross-section with rounded edges, or a cross section in the form of polygonal faces.
1 1. The system of claim. 1, characterized in that the inductive radiator coil winding (2) made of a conductive material insulated from each winding of adjacent coils.
12. The system of claim. 1, characterized in that the digital data transmission apparatus inductive method (13) is adapted to simulate one audio track number (track 1).
13. The system of claim. 1, characterized in that the digital data transmission apparatus inductive method (13) arranged to simulate a single track number 2 (track 2) containing billing information necessary when performing payment transactions.
14. The system of claim. 1, characterized in that the digital data transmission apparatus inductive method (13) arranged to simulate a single track number 3 (track 3).
15. The system of claim. 1, characterized in that the digital data transmission apparatus inductive method (13) formed as a lining to the electronic device.
16. The system of claim. 1, characterized in that the digital data transmission apparatus inductive method (13) is designed as a protective cover to the electronic device.
17. The system of claim. 1, characterized in that the digital data transmission apparatus inductive method (13) is designed as a key fob.
18. The system of claim. 1, characterized in that the digital data transmission apparatus inductive method (13) is designed as a bracelet.
19. The system of claim. 1, characterized in that, an inductive transmitter coil (2) is provided with a quality factor of from 0.0001 to 1200 μΗ / Ohm.
20. The system of claim 19, characterized in that the inductive transmitter coil (2) is provided with a disordered stacking of coils.
21. The system of claim 19, wherein the inductive coil transducer
(2) is provided with an ordered stacking of coils.
22. The system of claim. 1, characterized in that, the computing system (12), such as a mobile device provided with software (17), implemented on the basis of the secure storage algorithm details (16).
23. The system of claim. 1, wherein the software (17) is implemented on the basis of authorization and identification algorithm.
24. The system of claim. 1, characterized in that, the computing system (12) and the bank host system (15) and alparatno programmatically configured to simultaneously service implementation one-time-pin in the implementation of the algorithm encryption functions.
25. The system of claim. 1, characterized in that the digital data transmission apparatus inductive method (13) adapted to generate a signal when switching polarity.
26. The system of claim. 1, characterized in that the radiator driver (6) is formed by an H-bridge.
27. The system of claim. 1, characterized in that, the elements of the service one-time-pin located in a computer system (12) and the host system (15) of the bank.
PCT/UA2014/000080 2014-04-22 2014-07-25 Paybeam system for inductively transmitting digital data WO2015163836A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090159689A1 (en) * 2007-12-24 2009-06-25 Dynamics Inc. Payment cards and devices with gift card, global integration, and magnetic stripe reader communication functionality
US20130088234A1 (en) * 2010-06-17 2013-04-11 Koninklijke Philips Electronics N.V. Gradient coil power supply and a magnetic resonance imaging system
US8628012B1 (en) * 2013-01-20 2014-01-14 George Wallner System and method for a baseband nearfield magentic stripe data transmitter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090159689A1 (en) * 2007-12-24 2009-06-25 Dynamics Inc. Payment cards and devices with gift card, global integration, and magnetic stripe reader communication functionality
US20130088234A1 (en) * 2010-06-17 2013-04-11 Koninklijke Philips Electronics N.V. Gradient coil power supply and a magnetic resonance imaging system
US8628012B1 (en) * 2013-01-20 2014-01-14 George Wallner System and method for a baseband nearfield magentic stripe data transmitter

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