Nxp B.v.

Koninklijke Philips Corporation N.v.

Peter Thueringer

Franz Amtmann

Jose De Jesus Pineda De Gyvez

Klemens Breitfuss

Klaus Ully

Paul Hubmer

Heike Neumann

Peter Kompan

Bruce Murray

Stefan Posch

Hans De Jong

Ajay Kapoor

Markus Feuser

Wolfgang Meindl

Rinze Ida Mechtildis Peter Meijer

Ralf Malzahn

Vibhu Sharma

Susanne Stern

Michael Cernusca

Peter Schmallegger

Josef Preishuber-Pfluegl

Andreas Muehlberger

Torsten Kramer

In accordance with a first aspect of the present disclosure, an electronic identification device is provided, comprising an ultra-high frequency (UHF) communication unit, wherein said UHF communication unit is configured to be activated restrictedly. In accordance with a second aspect of the present disclosure, a method of operating an electronic identification device is conceived, said electronic identification device comprising an ultra-high frequency (UHF) communication unit, the method comprising restrictedly activating said UHF communication unit. In accordance with a third aspect of the present disclosure, a non-transitory machine-readable medium is provided, comprising instructions that, when executed, carry out a method of the kind set forth.

Electronic identification device

Reader () for determining the validity of a connection to a transponder (), designed to measure a response time of a transponder () and to authenticate the transponder () in two separate steps. Transponder () for determining the validity of a connection to a reader (), wherein the transponder () is designed to provide information for response time measurement to said reader () and to provide information for authentication to said reader () in two separate steps, wherein at least a part of data used for the authentication is included in a communication message transmitted between the reader () and the transponder () during the measuring of the response time.

Decoupling of measuring the response time of a transponder and its authentication

A RFID transponder includes an active load modulation unit and an energy harvesting unit coupled to the active load modulation unit. The active load modulation unit performs active load modulation on transmitted signals. The energy harvesting unit harvests RF energy from the ambient environment, converts the RF energy to DC energy, stores the DC energy, and supplies the DC energy to the active load modulation unit.

RFID transponder and method for supplying energy thereto

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.

Non-contact data carriers including an anti-collision scheme

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.

Clock synchronization in an RFID equipped device

A circuit for delivering power to a load from a wireless power supply comprises an inductor coil for placing in the electromagnetic field of an inductor coil of a supply and a switchable capacitor bank with capacitors switchable at least between a series and a parallel configuration. The voltage across the capacitor bank is used as a feedback control parameter for controlling the capacitor bank switching. A voltage regulator is used to supply the load with a constant voltage power supply derived from the capacitor bank output.

Wirelessly powered devices

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.

Wireless communications using active modulation

An authentication method () for a secure data transmission is provided, the method comprising performing a first authentication protocol () by using a first cipher and performing a second authentication protocol () by using a second cipher. Possible inputs for the first authentication protocol () may be one shared key or several keys, and one or two random numbers.

Method for authentication and electronic device for performing the authentication

Transponder () having stored a fixed identification number, which expands said identification number with a random number, encrypts said expanded number with a key, and sends it to a reader () on its request. Reader (), which on request receives an encrypted number from a transponder (), decrypts a received encrypted number with a key, which was also used by the transponder (), and extracts a fixed identification number associated with the transponder ().

System of providing a fixed identification of a transponder while keeping privacy and avoiding tracking

Transponder (), comprising a storage unit () having stored a number of different applications, a processing unit () which, on request of a reader (), is adapted to generate a response interpretable using an encryption scheme known by both the transponder () and the reader () so that the reader () is capable of determining whether an application is supported by the transponder () by analyzing the response using the encryption scheme, and a transmission unit () adapted to send the response to said reader ().

Reader and transponder for obscuring the applications supported by a reader and/or a transponder and method thereof

Embodiments of a clock distribution device and a method of clock distribution are described. In one embodiment, a clock distribution device includes a stacked clock driver circuit configured to perform clock signal charge recycling on input clock signals that swing between different voltage ranges and a load circuit. The stacked clock driver circuit includes stacked driver circuits configured to generate output clock signals that swing between the different voltage ranges. The load circuit includes load networks of different semiconductor types. Each of the load networks are configured to be driven by one of the output clock signals. Other embodiments are also described.

Stacked clock distribution for low power devices

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.

Method of reading a plurality of non-contact data carriers, including an anti-collision scheme

An RFID communication system comprises an NFC device () and a smart card () with contactless card functionality, wherein the NFC device () and the smart card () are couplable to each other via a protocol converter (), wherein the NFC device () is coupled to an antenna () to receive electromagnetic signals (ES) from an RFID reader/writer and to transmit response signals (RS) to the RFID reader/writer by modulating received electromagnetic signals (ES). The electromagnetic signals (ES) contain first and second characteristic components (FE, RE) which define the begin and the end of a predefined signal pattern (PA), wherein the second characteristic component triggers a predefined response delay time (FDT) at the expiration of which the RFID communication system has to respond to the RFID reader/writer. A device () for compensating signal delays is provided that comprises signal pattern shortening means ().

Device, system and method for compensating signal delays in an RFID communication system

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 (IDS) that renders possible an inventorying of the data carrier and is capable of delivering a generated response signal (IDS) with the use of a transmission start moment that can be selected from a plurality of transmission start moments (t, t), each data carrier tests whether another data carrier () is already giving its response signal (IDS). Each data carrier () subsequently discontinues the generation or delivery of its response signal (IDS) if another data carrier () is already providing its response signal (IDS).

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Graz, Austria

Peter Thueringer