Abstract: This invention provides a processor for writing data contained in payload data of a data packet to memory. The processor may, in some embodiments, be a central processing unit of a memory tag. The processor does not include a write buffer. The processor may comprise a first register adapted to latch first data corresponding to a segment of the payload data; and a second register adapted to receive second data from the payload data to enable the validity of the data latched into the first register to be established before data is written to memory. A memory device, a method for writing data contained in payload data, a data packet, a method of writing data into a non-volatile memory and a memory tag may also be provided.

Abstract: A data storage device includes a temperature sensor. The temperature sensor outputs a temperature signal corresponding to a detected temperature. An identification unit connected to the temperature sensor generates and outputs an identification signal based on the temperature signal. A plurality of such data storage devices can therefore be identified by their relative position to an interrogator which outputs heat.

Abstract: A physical object comprises one or more memory circuits adapted to be read wirelessly by a reader device attached to or incorporated within the physical object. Data in the memory circuit is protected from access by an unauthorised reader. Data in the memory circuit is also adapted to identify an authorised bearer of the physical object. Moreover, data in the memory circuit is adapted to allow access to a specified asset or assets by the authorised bearer.

Abstract: A detector for detecting the presence of a memory tag, the detector comprising a radio frequency source operable to generate a radio frequency signal and a detector resonant circuit part connected to the radio frequency source, the detector resonant circuit part comprising an antenna, the detector further comprising a power monitor responsive to the power of a reflected signal returned from the detector resonant circuit part, the power monitor being operable to generate an output in response to the power of the reflected signal, wherein a decrease in the power of the reflected signal indicates the presence of a tag in the vicinity of the antenna.

Abstract: Embodiments relating to a memory tag having a resonant circuit part and a non-volatile memory is presented. The resonant circuit part can be made operable, in response to a reader signal received from a reader, to provide power to the memory, the tag being operable to read the memory and transmit data stored in the memory in response to the signal from the reader. The data is stored in the memory in a plurality of data units, with each data unit having an associated sequence number. The tag is operable to store the sequence number of the data unit to be transmitted in a register in the non-volatile memory. When power is supplied to the memory, the data units are transmitted in sequence, where the first data unit to be transmitted depends on the stored sequence number.

Abstract: A method of enabling communication is described. The method comprises transmitting a channel identifier and an a socket identifier to an initiator responsive to performing a reset of the channel identifier and the socket identifier on one or more target devices. The method also comprises communicating with an identified target device of the one or more target devices based on the transmitted channel identifier and the transmitted socket identifier of the identified target device responsive to receipt of the channel identifier and the socket identifier. The method also comprises enumerating two or more identified target devices of the one or more target devices based on a collision detection of transmitted channel identifiers and socket identifiers of the two or more identified target devices.

Abstract: The invention provides a receiver 120 having a sensor 114 configured to output a signal representative of temperature variation detected at the sensor 114. A decoder 118 connected to the sensor 114 decodes the signal detected by the sensor 114 and outputs a stream of data which has been encoded in the temperature variation. The receiver 120 may be for use with a microprocessor 202, for example the microprocessor 202 of a memory tag 200 which includes a voltage regulator 210 in power circuitry 206. A system 100 and method 300 for transferring data are also provided.

Abstract: A detector for detecting the presence of a memory tag, the detector comprising a radio frequency source operable to generate a radio frequency signal and a detector resonant circuit part connected to the radio frequency source, the detector resonant circuit part comprising an antenna, the detector further comprising a power monitor responsive to the power of a reflected signal returned from the detector resonant circuit part, the power monitor being operable to generate an output in response to the power of the reflected signal, wherein a decrease in the power of the reflected signal indicates the presence of a tag in the vicinity of the antenna.

Abstract: A detector for detecting the presence of a memory tag, the detector comprising a radio frequency source operable to generate a radio frequency signal and a detector resonant circuit part connected to the radio frequency source, the detector resonant circuit comprising an antenna, the detector further comprising a power monitor responsive to the power of a reflected signal returned from the detector resonant circuit part, the power monitor being operable to generate an output in response to the power of the reflected signal, wherein a decrease in the power of the reflected signal indicates the presence of a tag in the vicinity of the antenna.

Abstract: A detector for detecting the presence of a memory tag, the detector comprising a radio frequency source operable to generate a radio frequency signal and a detector resonant circuit part connected to the radio frequency source, the detector resonant circuit part comprising an antenna,

Abstract: A microelectrical resistance tomography system comprising one or more sensors, each sensor including a wafer substrate of electrically insulating material having an aperture bounding a fluid flow path through a tube and a plurality of sensor electrodes on the substrate disposed circumferentially around the aperture so as to contact the fluid.

Abstract: Method and apparatus for obtaining a representation of the distribution of electrical impedance within material contained within a containing wall, comprising providing a plurality of mutually spaced electrodes mounted at spaced locations of the wall, electrically insulated from one another and arranged to be in electrical contact with material contained within the wall, applying between an electrical reference ground and each electrode, separately, an input electrical signal which, while applied to any one of the electrodes, causes respective output electrical signals to be generated between the reference ground and each other one of the electrodes, measuring the output electrical signals and processing the resulting measured data to provide a representation of the distribution, within the said material, of its electrical impedance.