Patent application number | Description | Published |
20080198907 | Circuit For A Communication Device And Method Of Controlling A Transmission - A circuit ( | 08-21-2008 |
20090010371 | SERIAL DATA COMMUNICATION SYSTEM AND METHOD - A serial data communication system ( | 01-08-2009 |
20090280753 | Method of Checking the Integrity of an Antenna Arrangement, Transmitter, Receiver and Transceiver - In a method of checking the integrity of an antenna arrangement ( | 11-12-2009 |
20100007467 | DEVICE, SYSTEM AND METHOD FOR COMPENSATING SIGNAL DELAYS IN AN RFID COMMUNICATION SYSTEM - An RFID communication system comprises an NFC device ( | 01-14-2010 |
20100056053 | SINGLE COMMUNICATION CHANNEL BETWEEN A CONTACTLESS FRONTEND DEVICE AND A TRANSCEIVER DEVICE - Method for exchanging data between an NFC device ( | 03-04-2010 |
20100164475 | DEVICE AND METHOD FOR MEASURING THE FREQUENCY OF A SIGNAL CODED MODULATED CARRIER SIGNAL | 07-01-2010 |
20120021681 | COMMUNICATION PARTNER APPLIANCE WITH AUTOMATIC SEND MODE ACTIVATION - A circuit is implemented for a near field communication (NFC) system which includes a communication partner appliance. The circuit is a data carrier which includes activators, a receiver, a detector, and a processor. The activators activate a first or second communication mode. The receiver receives a carrier signal that is transmitted to the communication partner appliance by another communication partner appliance. The detector detects the presence of the received carrier signal and transmits a carrier signal present signal or a carrier signal not-present signal. The processor recognizes a command signal transmitted with the carrier signal. The processor also generates and transmits a command-end signal that is separate from the transmitted command signal and represents the end of the transmitted command signal. The processor also determines whether, after the occurrence of the command-end signal, the carrier signal present signal is present. The processor also transmits a first or second activation signal. | 01-26-2012 |
20120156995 | COMMUNICATION PARTNER APPLIANCE WITH AUTOMATIC SEND MODE ACTIVATION - A communication partner appliance is implemented within a near field communication system. The communication partner appliance includes a receiver, a detector, and a processor. The receiver receives a NFC command signal from another communication partner appliance. The detector detects whether a carrier signal from the other communication partner appliance is present at the receiver and generates a corresponding status signal. The processor receives the command signal from the receiver, recognizes an end of the command signal, receives the status signal from the detector after the end of the command signal, and controls a power supply element based on the status signal after the end of the command signal. The power supply element is configured to establish a connection to either a first power supply or a second power supply. The first power supply is dependent on the carrier signal, and the second power supply is independent of the carrier signal. | 06-21-2012 |
20120229260 | METHOD OF READING A PLURALITY OF NON-CONTACT DATA CARRIERS, INCLUDING AN ANTI-COLLISION SCHEME - In a method of inventorying data carriers by means of a communication station, whereby the communication station and each data carrier are brought into communicative connection, and each data carrier brought into communicative connection with the communication station is capable of generating a response signal that renders possible an inventorying of the data carrier and is capable of delivering a generated response signal with the use of a transmission start moment that can be selected from a plurality of transmission start moments, each data carrier tests whether another data carrier is already giving its response signal. Each data carrier subsequently discontinues the generation or delivery of its response signal if another data carrier is already providing its response signal. | 09-13-2012 |
20120315849 | COMMUNICATION PARTNER APPLIANCE WITH AUTOMATIC SEND MODE ACTIVATION - A communication partner appliance is implemented within a near field communication system. The communication partner appliance includes a receiver, a detector, and a processor. The receiver receives a NFC command signal from another communication partner appliance. The detector detects whether a carrier signal from the other communication partner appliance is present at the receiver at a time other than during a transmission of the NFC command signal from the other communication partner appliance to the receiver. The processor controls a power supply element based on a determination by the detector whether the carrier signal from the other communication partner appliance is present at the receiver. The power supply element is configured to establish a connection to either a first power supply or a second power supply. The first power supply is dependent on the carrier signal, and the second power supply is independent of the carrier signal. | 12-13-2012 |
20130122809 | COMMUNICATION PARTNER APPLIANCE WITH AUTOMATIC SEND MODE ACTIVATION - A communication partner appliance is implemented within a near field communication system. The communication partner appliance includes a receiver, a detector, and a processor. The receiver receives a NFC command signal from another communication partner appliance. The detector detects whether a carrier signal from the other communication partner appliance is present at the receiver at a time other than during a transmission of the NFC command signal from the other communication partner appliance to the receiver. The processor controls a power supply element based on a determination by the detector whether the carrier signal from the other communication partner appliance is present at the receiver. The power supply element is configured to establish a connection to either a first power supply or a second power supply. The first power supply is dependent on the carrier signal, and the second power supply is independent of the carrier signal. | 05-16-2013 |
20140055246 | NON-CONTACT DATA CARRIERS INCLUDING AN ANTI-COLLISION SCHEME - Data carriers for inventorying by means of a communication station, whereby the communication station and each data carrier are brought into communicative connection, and each data carrier brought into communicative connection with the communication station is configured to generate a response signal that renders possible an inventorying of the data carrier and is capable of delivering a generated response signal with the use of a transmission start moment that can be selected from a plurality of transmission start moments, each data carrier tests whether another data carrier is already giving its response signal. Each data carrier is configured to discontinue the generation or delivery of its response signal if another data carrier is already providing its response signal. | 02-27-2014 |
20140218176 | WIRELESS COMMUNICATIONS USING ACTIVE MODULATION - A method of wireless communication, with a circuit that includes a radio frequency identification (RFID) reader, can be carried out using a circuit that is configured and arranged to communicate with RFID cards that use load modulation of an RF carrier provided by the RFID reader. A presence of the radio frequency (RF) carrier is detected on an antenna. A local clock signal is generated. A difference between the local clock signal and the RF carrier is detected. In response to the detected difference, the frequency of the local clock signal is modified to reduce the detected difference. Load modulation of the RF carrier is mimicked by modulating the local clock signal to encode data; and driving the antenna with the modulated local clock signal. | 08-07-2014 |
20140266611 | CLOCK SYNCHRONIZATION IN AN RFID EQUIPPED DEVICE - Embodiments of a method for clock synchronization in a radio frequency identification (RFID) equipped device, an RFID equipped device, and a hand-held communications device are described. In one embodiment, a method for clock synchronization in an RFID equipped device involves measuring a difference between a field clock frequency generated from an external clock and an internal clock frequency generated from an internal clock and generating outgoing bits in the RFID equipped device in response to the measured difference. Generating the outgoing bits involves adjusting the bit length of at least one of the outgoing bits in response to the measured difference. Other embodiments are also described. | 09-18-2014 |