Abstract: An integrated circuit for a radio-frequency identification (RFID) tag is described. In an example embodiment, the integrated circuit (101) comprises: a memory (104) for storing data; a transceiver (107) for receiving signals from, and transmitting signals to, an antenna (102); and a controller (103) configured to process signals received via the transceiver (107) and to access data stored in the memory (104); wherein upon receiving, via the transceiver module (107), a lock command referring to a data block in the memory (104), the controller (103) is configured to perform a data integrity check on the data block to determine whether the data block is strongly stored.

Abstract: The disclosure relates to an integrated circuit for a radio-frequency identification (RFID) tag. Example embodiments include an integrated circuit (101) for an RFID tag, the integrated circuit (101) comprising: a memory (104) for storing data; a transceiver (107) for receiving signals from, and transmitting signals to, an antenna (102); and a controller (103) configured to process signals received via the transceiver (107) and to access data stored in the memory (104); wherein upon receiving, via the transceiver module (107), a lock command referring to a data block in the memory (104), the controller (103) is configured to generate error correction data for the data block and to store the error correction data in the memory.

Abstract: The disclosure relates to an integrated circuit for a radio-frequency identification (RFID) tag. Example embodiments include an integrated circuit (101) for an RFID tag, the integrated circuit (101) comprising: a memory (104) for storing data; a transceiver (107) for receiving signals from, and transmitting signals to, an antenna (102); and a controller (103) configured to process signals received via the transceiver (107) and to access data stored in the memory (104); wherein upon receiving, via the transceiver module (107), a lock command referring to a data block in the memory (104), the controller (103) is configured to perform a data integrity check on the data block to determine whether the data block is stored correctly.

Abstract: The disclosure relates to an integrated circuit for a radio-frequency identification (RFID) tag. Example embodiments include an integrated circuit (101) for an RFID tag, the integrated circuit (101) comprising: a memory (104) for storing data; a transceiver (107) for receiving signals from, and transmitting signals to, an antenna (102); and a controller (103) configured to process signals received via the transceiver (107) and to access data stored in the memory (104); wherein upon receiving, via the transceiver module (107), a lock command referring to a data block in the memory (104), the controller (103) is configured to generate error correction data for the data block and to store the error correction data in the memory.

Abstract: Various exemplary embodiments relate to a method performed by an RFID tag, the method including: receiving a request for a EPC serial number; determining whether the EPC serial number has a preset value; when the EPC serial number has the preset value, mapping a transponder ID to the EPC serial number; and providing the EPC serial number in response to the RFID read request.

Abstract: Various aspects are directed to the detection of tampering, as may be applicable to retail goods and a variety of implementations. As may be consistent with one or more embodiments, an apparatus includes a loop conductor having first and second ends and contiguous conductive material extending in a loop between the ends. A detection circuit detects continuity of the loop conductor and characteristics of power that is provided to the loop conductor and is indicative of validity of the continuity detection. A communication circuit communicates a wireless signal indicative of the detected electrical characteristics, and an energy circuit powers the loop conductor, detection circuit and communication circuit via received wireless power. Other aspects are further directed to an interrogator that provides the wireless power and evaluates the wireless signal to detect tampering with the conductive loop and validity thereof.

Abstract: A system for managing a population of RFID tags where the system may include: an interrogator configured to transmit a select command to the population of RFID tags, and at least one modified tag in the population of RFID tags. The select command may include information specifying a memory location. The modified tag may include a memory configured with a memory address corresponding to the memory location specified by the select command, and a controller configured to perform at least one action upon the at least one modified tag receiving the select command. The at least one action may be based on the memory location specified by the select command.

Abstract: Various aspects are directed to the detection of tampering, as may be applicable to retail goods and a variety of implementations. As may be consistent with one or more embodiments, an apparatus includes a loop conductor having first and second ends and contiguous conductive material extending in a loop between the ends. A detection circuit detects continuity of the loop conductor and characteristics of power that is provided to the loop conductor and is indicative of validity of the continuity detection. A communication circuit communicates a wireless signal indicative of the detected electrical characteristics, and an energy circuit powers the loop conductor, detection circuit and communication circuit via received wireless power. Other aspects are further directed to an interrogator that provides the wireless power and evaluates the wireless signal to detect tampering with the conductive loop and validity thereof.

Abstract: Various exemplary embodiments relate to an integrated circuit (IC) including: an inventoried flag configured to indicate whether the integrated circuit has been inventoried in a current inventory round; and an event detector configured to detect a tag event at the integrated circuit and reset the inventoried flag based on the tag event. In various embodiments, the IC further includes a timer circuit configured to measure a predetermined time since the inventoried flag was set and to prevent the reset of the inventoried flag until the predetermined time has expired.

Abstract: Various exemplary embodiments relate to an integrated circuit (IC) including: an inventoried flag configured to indicate whether the integrated circuit has been inventoried in a current inventory round; and an event detector configured to detect a tag event at the integrated circuit and reset the inventoried flag based on the tag event. In various embodiments, the IC further includes a timer circuit configured to measure a predetermined time since the inventoried flag was set and to prevent the reset of the inventoried flag until the predetermined time has expired.

Abstract: Radio frequency communications are effected. In accordance with one or more embodiments, a radio frequency communication circuit includes an antenna having a conductor and a semiconductor chip having a lower substrate surface coupled with the conductor to pass data carried by radio frequency signals to a radio frequency communication circuit in an active layer on an upper surface of the substrate. Accordingly, communications are facilitated via the substrate and can alleviate the need to use through-substrate connectors and further facilitate placement of the chip on the antenna.

Abstract: Various exemplary embodiments relate to a method performed by an RFID tag, the method including: receiving a request for a EPC serial number; determining whether the EPC serial number has a preset value; when the EPC serial number has the preset value, mapping a transponder ID to the EPC serial number; and providing the EPC serial number in response to the RFID read request.

Abstract: Radio frequency communications are effected. In accordance with one or more embodiments, a radio frequency communication circuit includes an antenna having a conductor and a semiconductor chip having a lower substrate surface coupled with the conductor to pass data carried by radio frequency signals to a radio frequency communication circuit in an active layer on an upper surface of the substrate. Accordingly, communications are facilitated via the substrate and can alleviate the need to use through-substrate connectors and further facilitate placement of the chip on the antenna.

Abstract: A system for managing a population of RFID tags where the system may include: an interrogator configured to transmit a select command to the population of RFID tags, and at least one modified tag in the population of RFID tags. The select command may include information specifying a memory location. The modified tag may include a memory configured with a memory address corresponding to the memory location specified by the select command, and a controller configured to perform at least one action upon the at least one modified tag receiving the select command. The at least one action may be based on the memory location specified by the select command.

Abstract: A sub-stage for a charge pump includes a dc input pin, a dc output pin, a first radio frequency (rf) input pin configured to receive a first differential signal, a second rf input pin configured to receive a second differential signal, a first transistor having first, second and third terminals, a second transistor having first, second and third terminals, a first bias voltage source, and a second bias voltage source. The third terminal of the first transistor is configured to receive the second differential signal from the second rf input pin and a first offset voltage signal from the first bias voltage source. The third terminal of the second transistor is configured to receive the second differential signal from the second rf input pin and a second offset voltage signal from the second bias voltage source.

Abstract: A circuit (12) comprises a first circuit point (13) and a second circuit point (14), which first circuit point (13) and second circuit point (14) are designed to be connected with RF transmission means (11) being designed for receiving in a contact-less manner a carrier signal (CS) from a read/write station and for feeding the circuit (12) with the received carrier signal (CS). The circuit (12) further comprises circuit testing means (4) being designed to carry out functional tests of the circuit (12) and to output a modulated response signal (TS-MOD) via the first and second circuit points (13, 14) only if the functional tests have been successful.

Abstract: A sub-stage (212) for a charge pump (200) having a first and second phase of operation. The sub-stage (212) comprising a dc input pin (222); a dc output pin (220); a first rf input pin (202) configured to receive a first differential signal; and a second rf input pin (204) configured to receive a second differential signal. The sub-stage (212) further comprising a first transistor (224) having a first, second and third terminal, wherein a current channel is provided between the first and second terminal of the transistor (224); and a second transistor (226) having a first, second and third terminal, wherein a current channel is provided between the first and second terminal of the transistor (226). The first terminal of the first transistor (224) is connected to the dc input pin (222), the second terminal of the first transistor (224) is connected to the first terminal of the second transistor (226), and the second terminal of the second transistor (226) is connected to the dc output pin (220).

Abstract: An RFID system comprises at least one reading device (1) and at least one transponder (2, 2?, 2?, 2??), which are configured for non-contact communication by means of modulated electromagnetic signals (SS), which contain data and/or commands packed in data frames, in which the reading device (1) is configured for transmitting a group of data frames (D-SYNC), which contain synchronization information (Preamble, Start Delimiter) for synchronization with the transponder (2, 2?, 2?, 2??) and to transmit another group of data frames (D-NOSYNC) which do not contain such synchronization information, in which the transponder (2, 2?, 2?, 2??) has synchronization means (14, 20, 21) which are configured to effect synchronization with the reading device (1) with the help of synchronization information (Preamble, Start Delimiter) contained in received data frames (D-SYNC) and synchronization status test means (15,15?,15?,22) configured for detecting whether the transponder runs synchronously with the reading device and in

Abstract: An electric circuit (30) for generating a clock-sampling signal (CLK) for a sampling device (31) comprises a clock generator (1, 40, 50, 60) for generating a plurality of clock signals (21-24, 51-54, 61-64), a correlation device (L) for correlating a characteristic signal section (LE) of a digital signal (DS) with the plurality of clock signals (21, 22, 23, 24, 51-56, 61-64), and a selecting device (MX) for selecting one of the clock signals (21, 22, 23, 24, 51-55, 61-64) as the clock-sampling signal (CLK) for the sampling device (31) on the basis of the correlation by the correlation device (L). The clock signals (21-24, 51-54, 61-64) have the same cycle duration (T) and are phase-shifted with respect to each other. The sampling device (31) subsequently samples the digital signal (DS) with the clock-sampling signal (CLK).

Abstract: A capacitance system for a radio frequency (RF) charge pump of an RF integrated circuit (IC) includes a fringe capacitor, a second capacitor, and a silicon substrate region. The fringe capacitor is made of backend masks. The second capacitor is located underneath the fringe capacitor. The silicon substrate region is located underneath the second capacitor.