Patent application number | Description | Published |
20080258874 | TRANSPONDER CIRCUIT ARRANGEMENT AND METHOD FOR OPERATING A DEMODULATOR - A transponder circuit arrangement including antenna contacts to which an antenna signal can be applied. The antenna signal includes at least one signal in one transmission band of a plurality of transmission bands. The transponder circuit arrangement also includes a detector adapted to detect whether the antenna signal includes a signal in a predetermined transmission band, and a demodulator adapted to demodulate the signal in the predetermined transmission band when the signal has been detected therein, and otherwise to demodulate a signal in another transmission band. | 10-23-2008 |
20090011648 | COMMUNICATION DEVICE, MOBILE DEVICE AND METHOD OF COMMUNICATION - A communication device having a chip card configured to authorize a communication, the chip card having an interface connected to a communication controller via a modified standardized bus communication, a first and at least one second data source configured to connect to the communication controller. | 01-08-2009 |
20090127337 | IDENTIFICATION OF CONTACTLESS CARDS - A communication system includes at least one contactless card configured to transmit an encoded identifier; and a reader configured to receive the encoded identifier and compare the received encoded identifier with an encoded reference card identifier, wherein the reader requests data from the contactless card if the encoded identifier matches the encoded reference card identifier. | 05-21-2009 |
20090127934 | EMERGENCY CAPACITOR FOR A CONTACTLESS DEVICE - A power supply for a contactless device having a power supply circuit configured to provide an internal power supply voltage, an emergency capacitor circuit having an emergency capacitor, configured to provide a source current during an external field pause, and a power supply regulator configured to regulate the internal power supply voltage and the source current, wherein the emergency capacitor circuit is electrically coupled in parallel with the power supply circuit. | 05-21-2009 |
20090128354 | POWER SUPPLY FOR PROVIDING AN INTERNAL POWER SUPPLY VOLTAGE - A power supply for providing an internal supply voltage, the power supply including a current source configured to provide an internal supply voltage directly from its output, and a high speed internal supply voltage shunt, which is coupled to the current source output. | 05-21-2009 |
20090135635 | VOLTAGE CONVERTER, USAGE OF A VOLTAGE CONVERTER, METHOD FOR CONVERTING AN AC VOLTAGE INTO A DC VOLTAGE, AND CONTACTLESS CHIP CARD - The invention relates to a voltage converter comprising a rectification unit and a voltage regulation unit, wherein the input side of the voltage converter can have an AC voltage applied to it, the output side of the voltage converter can have a rectified voltage taken from it, and the voltage regulation unit regulates the power in the voltage converter. | 05-28-2009 |
20090200383 | ACTIVELY REGULATED MODULATION INDEX FOR CONTACTLESS IC DEVICES - A contactless IC device including a detection circuit configured to detect a carrier wave that has been amplitude shift-keying (ASK) modulated with digital data and a shunt circuit configured to regulate the carrier wave to a predetermined voltage level. | 08-13-2009 |
20090207893 | HF CONVERTER FOR MOBILE DEVICES - A high frequency (HF) converter for a mobile device, having an input device configured to receive a first signal including data in accordance with a standard, non-HF communication protocol or in accordance with an HF communication protocol; a converter device coupled to the input device, the converter device configured to convert the first signal to a second signal including the data in accordance with the other of the HF communication protocol and the standard, non-HF communication protocol; and an output device configured to transmit the second signal. | 08-20-2009 |
20100060351 | Chip Card Having an Adjustable Demodulation Unit - The present invention shows a contactless chip card comprising a controllable demodulation unit for demodulating an amplitude-modulated carrier signal, a measuring unit for determining a degree of modulation of the modulated carrier signal, and a control unit for controlling the demodulation unit on the basis of the determined degree of modulation of the carrier signal. | 03-11-2010 |
20100243737 | CONTACTLESS DATA RECEPTION - A contactless device including a transmission antenna configured to transmit a transmission signal; a pickup antenna configured to detect a field generated by a pickup signal, which comprises a response signal transmitted from another contactless device and the transmission signal; and a cancellation circuit configured to subtract a voltage of the transmission antenna from a voltage of the pickup antenna. | 09-30-2010 |
20100252631 | HIGH SPEED CONTACTLESS COMMUNICATION - A contactless reader including a crystal oscillator configured to generate a first signal having a first frequency, a phase-locked loop configured to generate a crystal-accurate second frequency derived from the first frequency of the first signal, and a signal generator configured to generate a carrier signal having the crystal-accurate second frequency. | 10-07-2010 |
20100303173 | CIRCUIT FOR DEMODULATING A PHASE MODULATED SIGNAL - A demodulator is provided for demodulating a phase-modulated data signal. The demodulator includes a phase frequency detector to output a voltage representing a phase difference between a received phase-modulated data signal and a reference clock signal. The voltage is input to first and second phase change detectors, which are provided to measure the phase difference of the phase-modulated data signal during first and second time periods, respectively. | 12-02-2010 |
20100311328 | CONTACTLESS DATA TRANSMISSION - A contactless device having an energy antenna configured to transmit/receive an energy signal; and a data antenna configured to transmit a data signal. Also, a method for transmitting a contactless signal including transmitting/receiving an energy signal from an energy antenna of a contactless device; and transmitting a data signal from a data antenna of the contactless device. | 12-09-2010 |
20100314444 | ANTENNA INTERFACE HAVING A PAUSE DETECTOR - An antenna interface of a contactless device including a current source configured to provide a current signal which is dependent on a radio frequency field; and a pause detector coupled to the current source and configured to detect a field pause from the current signal and output a field pause signal. | 12-16-2010 |
20100314445 | CONTACTLESS COMMUNICATION VIA A PLURALITY OF INTERFACES - A contactless communication device including an energy interface configured to activate the contactless communication device or a contactless communication partner based on a first carrier signal; and a contactless high speed data interface configured to enable data communication between the contactless communication device and the contactless communication partner based on a second carrier signal having a frequency greater than a high frequency (HF). | 12-16-2010 |
20110081016 | SECURE DATA COMMUNICATION USING ELLIPTIC CURVE CRYPTOLOGY - A contactless device including an contactless communication interface configured to receive a challenge from a contactless reader and a controller configured to generate an enciphered response using elliptic curve cryptology. Moreover, the enciphered response includes the challenge enciphered with a private key stored in non-volatile memory of the contactless device and data can be integrated as part of the challenge and/or the enciphered response. | 04-07-2011 |
20110215158 | Passive RFID Transponder and RFID Reader - A passive RFID transponder includes a coder and a modulator. The coder generates a digital coded data stream based on a digital data stream to be transmitted. The digital coded data stream includes an initialization bit sequence having a maximum data frequency of the digital coded data stream. Furthermore, the digital coded data stream changes its value at the latest after a predefined number of bits. The modulator modulates an amplitude of a carrier signal with the digital coded data stream to provide an amplitude-modulated coded signal. | 09-08-2011 |
20110243200 | Demodulator and Method for Demodulating a Carrier Signal - A demodulator includes a sampler and a trigger unit. The sampler is configured to sample a carrier signal based on a trigger signal to obtain a demodulated signal. The trigger unit is configured to detect a zero crossing of the carrier signal or an extreme value of an amplitude of the carrier signal. Further, the trigger unit is configured to provide the trigger signal based on the detected zero crossing or the detected extreme value, so that the carrier signal is sampled by the sampler with a predefined phase shift to the detected zero crossing or the detected extreme value. The predefined phase shift is larger than 30° plus an integer multiple of 90° and lower than 60° plus the same integer multiple of 90° in reference to the carrier signal. | 10-06-2011 |
20110244811 | Demodulator and Method for Demodulating a Modulated Carrier Signal - A demodulator includes a sampler configured to sample a plurality of first amplitude values of a modulated carrier signal using a constant sampling frequency and a plurality of second amplitude values of the modulated carrier signal at different times using the same constant sampling frequency. The constant sampling frequency is equal to a carrier frequency of the modulated carrier signal with a tolerance of +/−1% of the carrier frequency. | 10-06-2011 |
20120056718 | TRANSPONDER AND METHOD FOR OPERATING A TRANSPONDER - An RFID transponder having an adjustable response field strength including a determination circuit formed to determine a quantity which is derivable from a field strength of an electromagnetic field prevailing at the location of the RFID transponder, a comparator formed to compare the determined quantity derived from the field strength with a threshold value, wherein the threshold value is based on the adjustable response field strength, which is higher than the minimum field strength required for the operation of the RFID transponder, and a deactivator formed to deactivate a functionality of the RFID transponder if the derived quantity falls below the threshold value. | 03-08-2012 |
20130171931 | Communication Method Between Electronic Appliances, and Corresponding Appliances - A communication method for the communication between two appliances which are set up for communication in a first communication mode is provided. The method includes sending an activation sequence in a second communication mode from the first to the second appliance in order to initiate communication based on the first communication mode; sending data from the second appliance to the first appliance based on the first communication mode. The activation sequence sent to the second appliance includes an initialization sequence and a request for data communication in the first communication mode. In addition, a corresponding electronic appliance and system are provided. | 07-04-2013 |
20130233929 | SMART CARD DEVICE - In various embodiments a smart card device is provided, including a processor, a power interface configured to provide power to at least one smart card device external device, a first receiving antenna configured to provide power to the processor, and a second receiving antenna configured to provide power to the power interface. | 09-12-2013 |
20130234528 | Power supply apparatus for providing a voltage from an electromagnetic field - Different exemplary embodiments provide a power supply apparatus for providing a voltage from an electromagnetic field, which apparatus has a conversion device which is set up to derive a voltage from a wirelessly received electromagnetic field, and a decoupling device which is coupled to the conversion device and has a first connection and a second connection, at each of which a supply voltage is provided, the decoupling device suppressing an effect of the circuits coupled to the first and second connections on the power supply apparatus. | 09-12-2013 |
20130243436 | CONTACTLESS CHIP CARD, CONTACTLESS CHIP CARD READING DEVICE AND CONTACTLESS COMMUNICATION SYSTEM INCLUDING A PLURALITY OF COMMUNICATION INTERFACES - A contactless chip card may include: a first communication interface which is configured to receive a first signal by means of an electromagnetic field with a first frequency; a clock signal generating circuit which is coupled to the first communication interface and is configured to derive a clock signal from the first signal; a second communication interface which is coupled to the clock signal generating circuit and is configured to make available a signal transmission on the basis of the clock signal by means of an electromagnetic field with a second frequency, wherein the first frequency is different from the second frequency. | 09-19-2013 |
20130252544 | Interface Deactivation for Communication Between Electronic Appliances - A method for controlling the flow of data in a near field communication appliance having an interposed element and a plurality of secure elements is disclosed. The method includes: receiving a first communication, sent by an external appliance, which is intended for an application located in one of the secure elements; determining whether a first one of the secure elements contains the application; and deactivating an interface from the interposed element to the first secure element if the first secure element does not contain the application. Corresponding systems and appliances for near field communication are also disclosed. | 09-26-2013 |
20130252545 | Methods and Appliances for Forwarding Communication Between Electronic Appliances - A method for controlling the flow of data in a near field communication appliance having a plurality of secure elements is provided. The method includes receiving a first communication, sent by an external appliance, which is intended for an application located in one of a plurality of secure elements of the near field communication appliance. The method further includes determining which of the secure elements contains the application, and taking measures in order to ensure that a further communication exclusively between the external appliance and the secure element contains the addressed application. In addition, appropriate mobile terminals for NFC communication are disclosed. | 09-26-2013 |
20130254844 | Targeted Muting for Communication Between Electronic Appliances - A method for controlling the flow of data in a near field communication appliance having an interposed element and a plurality of secure elements connected to the interposed element is disclosed. The method includes receiving a first communication at a first one of the secure elements. The first communication is sent by an external appliance and suited to an application located in one of the secure elements. The method further includes testing, by means of the first secure element, whether the first secure element contains the application. The first secure element is muted if the first secure element does not contain the application. A corresponding near field communication appliance and terminals are also disclosed. | 09-26-2013 |
20140045423 | ARRANGEMENT AND A METHOD FOR OPERATING AN ARRANGEMENT - An arrangement including: an electronic device including a processor; a memory; a communication interface; and a power interface; an electronic circuit including: a communication interface to communicate with the electronic device via a communication interface of the electronic device; a near field communication interface to receive signals via an electromagnetic field; a processor to be powered by the electromagnetic field, to determine an operation program code to operate the electronic device from the signals received via the electromagnetic field, and to generate at least one operation program code message including the operation program code to be transmitted to the electronic device via the communication interfaces; a power interface to transmit electrical energy to the power interface of the electronic device to enable the electronic device to at least one of store and process the at least one operation program code message. | 02-13-2014 |
20140065981 | CHIP CARD COMMUNICATION ARRANGEMENT AND CHIP CARD COMMUNICATION CIRCUIT - According to an embodiment, a chip card communication arrangement is provided comprising a matching network and a chip card communication circuit comprising at least one matching network terminal, a receiver coupled to the matching network via the at least one matching network terminal and an active transmitter coupled to the matching network via the at least one matching network terminal. | 03-06-2014 |
20140319229 | RADIO COMMUNICATION PROCESSOR ARRANGEMENT - In accordance with various embodiments, a radio communication processor arrangement including a chip and a battery integrated into the chip is provided. | 10-30-2014 |
20140346236 | SMART CARD - In accordance with various embodiments, a smart card is described which has an antenna, which is configured to receive an electromagnetic signal, a rectifier, which is configured to rectify the received signal, and a capacitive or an inductive DC-to-DC voltage converter, which is configured to provide a supply voltage on the basis of the rectified signal. | 11-27-2014 |