NXP Semiconductors

A method for performing ultra-wide-band (UWB) radio-frequency (RF) frame validation, wherein an UWB frame comprises: a synchronisation header (SYNC) field suitable for synchronisation between a transmitter and a receiver, and a scrambled timestamp sequence (STS) suitable for providing additional integrity and security for ranging measurements. The method comprises: receiving a SYNC channel impulse response (CIR) of an UWB frame; receiving an STS CIR of the UWB frame; comparing peak amplitude values of the SYNC CIR and the STS CIR. If a difference between the peak amplitude values of the SYNC CIR and the STS CIR is greater than a predetermined magnitude difference threshold, then: rejecting the UWB frame; else: comparing polarities of the SYNC CIR and the STS CIR. If the polarities of the SYNC CIR and the STS CIR are different, then rejecting the UWB frame; else: accepting the UWB frame.

In accordance with a first aspect of the present disclosure, a near field communication (NFC) device is provided, comprising: an NFC antenna; a first transmitter operatively coupled to the NFC antenna; a second transmitter operatively coupled to the NFC antenna; a controller operatively coupled to the first transmitter and the second transmitter; wherein the NFC antenna comprises a first part and a second part, the first part extending from the first transmitter to a ground connection of said NFC antenna, and the second part extending from said ground connection to the second transmitter; wherein the controller is configured to cause the first transmitter to feed the first part of the NFC antenna while the second transmitter does not feed the second part of the NFC antenna, and to cause the second transmitter to feed the second part of the NFC antenna while the first transmitter does not feed the first part of the NFC antenna. In accordance with a second aspect of the present disclosure, a corresponding method of operating an NFC device is conceived.

The disclosure relates to methods of training an object detecting and tracking model. The object detecting or tracking model is trained by receiving (S201) location telemetry data transmitted by an object within the field of view and receiving (S203) sensor data from a sensor and derives object data therefrom. The object detecting and tracking model derives the ground truth from the location telemetry data and uses that to train the model. The disclosure further discusses related systems

The present disclosure relates to a communication device, wherein the communication device is configured to receive a CAN frame via the CAN interface, the CAN frame comprises a first stream packet comprising a first stream data field and a first header, which comprises a plurality of common header fields and a plurality of first header fields, wherein the processing unit is configured to create a second stream packet corresponding to the first stream packet except for the first header fields, such that the second stream packet comprises the first stream data field and a second header comprising the common header fields and, in place of the first header fields, at least one second header field, wherein the processing unit is configured to create an Ethernet frame comprising the second stream packet as a payload, wherein the processing unit is configured to create a destination MAC address and a source MAC address of the Ethernet frame based on at least one of the plurality of first header fields, and wherein the communication device is configured to send the Ethernet frame via the Ethernet interface.

The present invention relates to a Controller Area Network, CAN, device comprising: a data, RD, interface, a processing unit, and a bus interface for coupling to a CAN bus, wherein the CAN device is configured to receive first data via the RD interface, wherein the processing unit is configured to create a series of CAN frames referred to as a frame series based on the first data such that the frame series comprises a start CAN frame and at least one further CAN frame referred to as at least one follower CAN frame, wherein the processing unit is configured to distribute the first data among the CAN frames of the frame series, wherein the processing unit is configured to create the start CAN frame such that the start CAN frame comprises an identifier that represents a priority value referred to as the start priority value within a predefined first value range, wherein the processing unit is configured to create each follower CAN frame such that each follower CAN frame comprises a respectively associated identifier that represents a priority value referred to as a follower priority value within a predefined second value range, wherein the second value range is less than the first value range, and wherein the CAN device is configured to transmit the CAN frames of the frame series via the CAN interface such that the at least one follower CAN frame follows the start CAN frame.

The disclosure relates to a frequency doubler circuit (100) comprising: first and second input terminals (101, 102) for receiving an input voltage signal (IN+, IN-) at a first frequency; a first pair of transistors (103a, 103b) connected between a supply line (104) and a first node (105); a second pair of transistors (106a, 106b) connected between a common line (107) and a second node (108), the first and second pairs of transistors (103a, 103b, 106a, 106b) having gates coupled to the respective first and second input terminals (101, 102); an output matching circuit (109) having first and second output terminals (110, 111) for providing an output voltage signal (OUT+, OUT-) at a second frequency; a first common gate transistor (112) connected between the first node (105) and a first input (113) of the output matching circuit (109); and a second common gate transistor (114) connected between the second node (108) and a second input (115) of the output matching circuit (109).

A method (800) for adapting a supply voltage of a device comprises: configuring (810) a change in an operational state of the device; measuring (820) a temperature of the device; determining (830) a supply voltage level for the device to operate in the configured operational state; and adapting (840) a supply voltage of the device in dependence on at least the measured temperature and the supply voltage level for the device to operate in the configured operational state.

The disclosure relates to a Zener diode that is insensitive to external stress, and to a method of making such a Zener diode. A lattice mismatch is used to induce a compressive stress in the junction of the Zener diode in the direction of current flow. The lattice mismatch may be produced by carbon doping.

The disclosure relates to measurement of a change in distance over time using radar. Example embodiments include a computer-implemented method of measuring a change in distance over time using FMCW radar signals, the method comprising: transmitting (1701) a series of chirp signals; receiving (1702) a series of reflected chirp signals from a target; and processing (1703, 1704, 1705) the series of reflected chirp signals to determine a change in distance to the target over time from phase differences between the transmitted and received chirp signals, wherein phase differences between successive frames (1301, 1302) derived from the received chirp signals are fitted to a function (1303) to correct for any phase differences greater than 2π between the successive frames (1301, 1302).

An ESD circuit includes a clamp that can be used for both discharging ESD current and for over voltage protection. The integrated circuit includes a signal IC terminal that is coupled to the clamp through a resistor circuit. In response to an over voltage condition of the signal IC terminal, the clamp becomes conductive to make conducive a discharge path between the signal IC terminal and a supply voltage rail to conduct charge to reduce the over voltage condition. The discharge path is through the resistor and through the clamp. A transistor is coupled to the control terminal of the clamp and has a control input coupled to receive an ESD trigger signal. In response to a detected ESD event, the trigger circuit is asserted to make the transistor conductive to pull the voltage of the control terminal of the clamp towards a voltage of the supply voltage rail to make conductive the discharge path to discharge ESD current between the IC terminal and the supply voltage rail.