Abstract: A magnetic angle sensor system includes a first magnetic sensor configured to generate a first sensor signal, a second magnetic sensor configured to generate a second sensor signal, and at least one signal processor configured to: generate an angle signal including an angular value corresponding to an orientation of a magnetic field based on the first sensor signal and the second sensor signal; generate a vector length signal comprising a plurality of vector lengths corresponding to the first sensor signal and the second sensor signal; and extract at least one spectral component of the vector length signal, the at least one spectral component being indicative of a vector length variance between at least two consecutively sampled vector lengths of the plurality of vector lengths.

Abstract: A sigma delta (SD) pulse-width modulation (PWM) loop includes a loop filter implementing a linear transfer function to generate a loop filter signal, wherein the loop filter is configured to receive an input signal and a first feedback signal and generate the loop filter signal based on the input signal, the first feedback signal, and the linear transfer function; and a hysteresis comparator coupled to an output of the loop filter, the hysteresis comparator configured to receive the loop filter signal and generate a sigma delta PWM signal based on the loop filter signal, wherein the first feedback signal is derived from the sigma delta PWM signal.

Abstract: A fault detection system includes a sensor configured to measure a physical quantity and generate a measurement of the physical quantity; a first processor configured to receive the measurement, execute a first firmware based on the measurement, and output a first result of the executed first firmware; a second processor configured to receive the measurement from the sensor, execute a second firmware based on the measurement, and output a second result of the executed second firmware, wherein the first firmware and the second firmware provide a same nominal function in a diverse manner for calculating the first result and the second result, respectively, such that the first result and the second result are expected to be within a predetermined margin; and a fault detection circuit configured to detect a fault when the first result and the second result are not within the predetermined margin.

Abstract: A sensor may obtain sensor data. The sensor may transmit the sensor data to a controller via a sensor-controller interface. The sensor may determine, based on the sensor data, a security characteristic for the sensor data. The sensor may encrypt the security characteristic to generate an encrypted security characteristic. The sensor may transmit the encrypted security characteristic to the controller via the sensor-controller interface.

Abstract: In some examples, a method of operating a circuit is described. The method may include performing a circuit function and estimating a probability of failure of the circuit based on one or more stress origination metrics, one or more stress victim events, and one or more initial state conditions.

Abstract: In some examples, a method of operating a circuit may comprise performing a circuit function under normal conditions, performing the circuit function under aggravated conditions, predicting a potential future problem with the circuit function under the normal conditions based on an output of the circuit function under the aggravated conditions, and outputting a predictive alert based on predicting the potential future problem.

Abstract: In some examples, a method comprises performing a circuit function via a circuit; and estimating a remaining life of the circuit. Moreover, estimating the remaining life of the circuit may include measuring one or more circuit parameters over a period of time during operation of the circuit, and estimating the remaining life of the circuit based on the one or more measured circuit parameters over the period of time during operation of the circuit.

Abstract: In some examples, this disclosure describes a method of operating a circuit. The method may comprise performing a circuit function under normal operating conditions, wherein performing the circuit function under the normal operating conditions includes performing at least a portion of the circuit functions via a characteristic circuit, performing at least the portion of the circuit function under enhanced stress conditions via a characteristic circuit replica, and predicting a potential future problem with the circuit function under the normal conditions based on an evaluation of operation of the characteristic circuit relative to operation of the characteristic circuit replica.

Abstract: In some examples, a circuit comprises a function unit configured to perform a circuit function, and one or more in situ monitors configured to measure internal data associated with the circuit. The circuit may further comprise a memory configured to store one or more limit values associated with the one or more in situ monitors, and a lifetime model unit configured to determine whether the circuit has reached an end-of-life threshold based on the measured internal data from the one or more in situ monitors and the limit values.

Abstract: A sensor module includes at least one sensor configured to generate sensor information and processing circuitry configured to generate a sensor signal based on the sensor information. The sensor signal includes a sync frame, including two sync signal edges defining the sync frame and indicating a pre-determined synchronization time interval, and the sensor signal further includes a plurality of data signal portions, including at least one data signal portion transmitted within the sync frame. The at least one data signal portion is provided within the sync frame located between the two sync signal edges, wherein each of the at least one data signal portion is defined by at least one data signal edge interposed in the sensor signal between the two sync signal edges.

Abstract: A sensor system includes a first metamaterial track mechanically coupled to a rotational shaft configured to rotate about a rotational axis, wherein the first metamaterial track is arranged at least partially around the rotational axis, and wherein the first metamaterial track includes a first array of elementary structures; at least one transmitter configured to transmit a first continuous wave towards the first metamaterial track, wherein the first metamaterial track is configured to convert the first continuous wave into a first receive signal based on a rotational parameter of the rotational shaft; and at least one quadrature continuous-wave receiver configured to receive the first receive signal, acquire a first measurement of a first property of the first receive signal, and determine a measurement value for the rotational parameter of the rotational shaft based on the first measurement.

Abstract: A torque measurement system includes an outer rotational shaft and an inner rotational shaft both configured to rotate about a rotational axis. A rotation of the inner rotational shaft causes a rotation of the outer rotational shaft via a coupling structure. At least one torque applied to the inner rotational shaft is translated into a first torque-dependent angular shift between the shafts. A first metamaterial track is coupled to the outer rotational shaft and configured to co-rotate with the outer rotational shaft. A second metamaterial track is coupled to the inner rotational shaft and configured to co-rotate with the inner rotational shaft. The tracks are configured to convert an electro-magnetic transmit signal into a first electro-magnetic receive signal based on the first torque-dependent angular shift and a receiver is configured to receive the electro-magnetic receive signal and measure the at least one torque based on the electro-magnetic receive signal.

Abstract: A position sensor system comprises a magnetic strip extending in a readout direction and comprising magnetic poles alternating at a constant pitch along the readout direction. At least a first differential magnetoresistive sensor comprises magnetoresistive sensing elements spaced at the pitch. The magnetic poles of the magnetic strip and the first differential magnetoresistive sensor are movable with respect to each other in the readout direction.

Abstract: In some examples, a circuit may be configured to perform a method that includes performing a circuit function via a circuit function unit of a circuit, receiving sensor data from one or more sensors associated with the circuit function unit, and estimating a remaining life of the circuit based on an accelerated reliability model and the sensor data, wherein the sensor data comprises input to the accelerated reliability model. The circuit itself may include a dedicated circuit unit that estimates the remaining life of the circuit based on an accelerated reliability model and the sensor data, and the circuit may output one or more predictive alerts or predictive faults when the remaining life is below a threshold, which may prompt the system for predictive maintenance on the circuit.

Abstract: An autocalibration method includes generating at least one sensor signal in response to measuring a physical quantity; compensating the at least one sensor signal based on at least one compensation parameter to generate at least one compensated sensor signal; generating the at least one compensation parameter based on the at least one sensor signal or the at least one compensated sensor signal; comparing each of the at least one compensation parameter to a respective tolerance range; on a condition that each of the at least one compensation parameter is within its respective tolerance range, transmitting the at least one compensation parameter as at least one validated compensation parameter to be used for compensating the at least one sensor signal; and on a condition that at least one of the at least one compensation parameter is not within its respective tolerance range, generating a fault detection signal.

Abstract: A sigma delta (SD) pulse-width modulation (PWM) loop includes a loop filter implementing a linear transfer function to generate a loop filter signal, wherein the loop filter is configured to receive an input signal and a first feedback signal and generate the loop filter signal based on the input signal, the first feedback signal, and the linear transfer function; and a hysteresis comparator coupled to an output of the loop filter, the hysteresis comparator configured to receive the loop filter signal and generate a sigma delta PWM signal based on the loop filter signal, wherein the first feedback signal is derived from the sigma delta PWM signal.

Abstract: A sensor device using verification includes a sensor component and a verification component. The sensor component is configured to generate first data and second data. The verification component is configured to analyze the first data and the second data and generate verification data based on the first data and the second data.

Abstract: The described techniques facilitate the secure transmission of sensor measurement data to an ECU by implementing an authentication procedure. The authentication procedure includes an integrated circuit (IC) generating authentication tags by encrypting portions of sensor measurement data. These authentication tags are then transmitted together with the sensor measurement data as authenticated sensor measurement data. The ECU may then use the authentication tags to authenticate the sensor measurement data based upon a comparison of the portions of the sensor measurement data sensor measurement data to the authentication tag that is expected to be generated for those portions of sensor measurement data.

Abstract: An autocalibration method includes generating at least one sensor signal in response to measuring a physical quantity; compensating the at least one sensor signal based on at least one compensation parameter to generate at least one compensated sensor signal; generating the at least one compensation parameter based on the at least one sensor signal or the at least one compensated sensor signal; comparing each of the at least one compensation parameter to a respective tolerance range; on a condition that each of the at least one compensation parameter is within its respective tolerance range, transmitting the at least one compensation parameter as at least one validated compensation parameter to be used for compensating the at least one sensor signal; and on a condition that at least one of the at least one compensation parameter is not within its respective tolerance range, generating a fault detection signal.

Abstract: A rotation sensor system includes a rotatable target object configured to rotate about a rotational axis in a rotation direction; a first millimeter-wave (mm-wave) metamaterial track coupled to the rotatable target object, where the first mm-wave metamaterial track is arranged around the rotational axis, and where the first mm-wave metamaterial track includes a first array of elementary structures having at least one first characteristic that changes around a perimeter of the first mm-wave metamaterial track; at least one transmitter configured to transmit a first electro-magnetic transmit signal towards the first mm-wave metamaterial track, where the first mm-wave metamaterial track converts the first electro-magnetic transmit signal into a first electro-magnetic receive signal; at least one receiver configured to receive the first electro-magnetic receive signal; and at least one processor configured to determine a rotational parameter of the rotatable target object based on the received first electro-magne