Infineon Technologies Ag

Simon Hainz

Dirk Hammerschmidt

Tobias Werth

Christof Bodner

Johannes Guettinger

Robert Hermann

Christoph Schroers

Mario Motz

Klaus Grambichler

Friedrich Rasbornig

Bernhard Schaffer

Peter Slama

Helmut Koeck

Wolfgang Horn

Kirk Herfurth

Alessandro Michelutti

Ernst Katzmaier

Lorenzo Coceani

Armin Satz

Michael Weber

Simone Fontanesi

Catalina-Petruta Juglan

Bernhard Forster

Manfred Schindler

Wolfgang Schweiker

Massimiliano Zilli

Theodor Kranz

Alessandro Petri

Hubert Fischer

Peter Alfred Friessnegger

Michael Burk Westpfahl

David Tatschl

Matthias Pohl

A wheel sensor arrangement can include a first wheel speed sensor and a second wheel speed sensor. The first wheel speed sensor can include or be implemented with a first semiconductor die and can provide data regarding a speed of a rotating wheel. The second wheel speed sensor can also include or be implemented with a second semiconductor die and can provide data regarding the speed of the rotating wheel. The second semiconductor die can be galvanically isolated from the first semiconductor die. The wheel sensor arrangement can include a mold housing that forms around the first wheel speed sensor and the second wheel speed sensor. The mold housing can include a separation feature between the first sensor and the second sensor.

Systems and devices for wheel sensors

A sensor module may include a back-bias magnet with a magnetization in a first direction. The sensor module may include a sensor chip including a first set of tunnel magnetoresistive (TMR) sensing elements. The sensor chip may be configured to determine a characteristic of a first magnetic field component using the first set of TMR sensing elements, and to generate a sensor signal based at least in part on the characteristic of the first magnetic field component. A value of the sensor signal may correspond to a linear position of a ferromagnetic object.

Linear tunnel magnetoresistive sensor including an integrated back-bias magnet

A monitoring device of a sensor may obtain a first signal at a point on a first branch of a signal path of the sensor. The monitoring device may obtain a second signal at a point on a second branch of the signal path of the sensor and may monitor the first signal for first characteristics indicated by the first signal. The monitoring device may monitor the second signal for second characteristics indicated by the second signal. The monitoring device may determine whether a quantity of first characteristics indicated by the first signal without a particular quantity of second characteristics being indicated by the second signal reaches a threshold quantity of first characteristics. The monitoring device may assess functionality of the signal path based on whether the quantity of first characteristics indicated by the first signal without a particular quantity of second characteristics being indicated by the second signal reaches the threshold quantity of first characteristics.

Robust signal path plausibility check for functional safety of a sensor

A magnetic sensor configured to detect a rotation of an object includes at least one sensor element configured to generate at least one sensor signal based on a magnetic field that is modulated by the rotation of the object; a sensor circuit configured to generate a data transmission signal based on the at least one sensor signal, wherein the data transmission signal comprises a plurality of data transmission blocks; and a memory configured to store transmission block status information indicative of whether or not one of the plurality of data transmission blocks has been triggered for transmission. The sensor circuit is configured to detect an interrupt event that disrupts the transmission of the data transmission signal and avoid a complete loss of a data transmission block due to the detected interrupt event based on the transmission block status information present at a time the interrupt event is detected.

Method for reducing a microbreak memory area and enhanced timing scheme for freezing microbreak feature for a speed sensor

A sensor device includes at least one first sensor element that generates a first sensor signal based on sensing a varying magnetic field; at least one second sensor element that generates a second sensor signal based on sensing the varying magnetic field; a signal tracking circuit that generates a trigger signal having trigger pulses that are generated based on crossings of the first sensor signal with an adaptive threshold and extracts vibration relevant information using the first sensor signal and the second sensor signal; an output controller that generates an output signal having output pulses that are triggered by the trigger pulses during a non-vibration event and suppress the output pulses during an entire duration of a vibration event; and a vibration detection circuit that detects the vibration event based on the extracted vibration relevant information and indicates the vibration event to the output controller.

Vibration compatible watchdog for speed sensors

A magnetic sensor includes a sensor arrangement including a plurality of resistive elements electrically arranged in an asymmetrical bridge circuit, where the plurality of resistive elements include a plurality of magnetic field sensor elements and a plurality of non-magnetic sensitive resistive elements. Moreover, a first total resistance of a first pair of resistive elements is different from a second total resistance of a second pair of resistive elements. A first leg of the asymmetrical bridge circuit includes a first magnetic field sensor element and a first non-magnetic sensitive resistive element. A second leg of the asymmetrical bridge circuit includes a second magnetic field sensor element and a second non-magnetic sensitive resistive element. The asymmetrical bridge circuit is configured to generate a differential signal based on sensor signals generated by the plurality of magnetic field sensor elements in response to a magnetic field impinging thereon.

Magnetic sensor with an asymmetric Wheatstone bridge

A sensor system having a current interface includes a supply and current interface, an electronic control unit and an enhanced initialization sensor. The supply and current interface is configured to receive a supply voltage. The electronic control unit is coupled to the supply and current interface. The enhanced initialization sensor is coupled to the supply and current interface. The enhanced initialization sensor is configured to initialize the supply and current interface at a suitable current level to mitigate erroneous information. measurement system.

Supply self adjustment for systems and methods having a current interface

A magnetic sensor is configured to measure a magnetic field whose magnitude oscillates between a first extrema and a second extrema. The magnetic sensor includes a plurality of magnetic field sensor elements, each configured to generate a sensor signal in response to the magnetic field impinging thereon. The plurality of sensor elements are grouped into a first group from which a first measurement signal is derived and a second group from which a second measurement signal is derived, and the first measurement signal and the second measurement signal having a phase difference based on different phases. The magnetic sensor further includes a sensor circuit configured to receive the first measurement signal and the second measurement signal, and apply a signal conversion algorithm thereto to generate a converted measurement signal having an increased frequency with respect to the first measurement signal and the second measurement signal.

Frequency increasing sensor protocol in magnetic sensing

Magnetic sensors, sensor modules, and methods thereof are provided. A magnetic sensor includes a sensor arrangement including a plurality of magnetic field sensor elements electrically arranged in an asymmetrical bridge circuit, where a first total resistance of a first pair of sensor elements provided on a first side of the asymmetrical bridge circuit is different from a second total resistance of a second pair of sensor elements provided on a second side of the asymmetrical bridge circuit, and the asymmetrical bridge circuit is configured to generate a differential signal based on sensor signals generated by the plurality of magnetic field sensor elements in response to a magnetic field impinging thereon.

Magnetic sensor with an asymmetric wheatstone bridge

A signal encoder for encoding a wheel speed sensor signal includes an input interface. The input interface is configured to receive a wheel speed sensor signal providing speed information and additional information. Furthermore, the signal encoder includes a signal processing circuit. The signal processing circuit is configured to generate a first and a second speed pulse. A time interval between the first and the second speed pulse corresponds to the speed information. Additionally, the signal processing circuit is configured to generate a data pulse between the first and the second speed pulse based on the additional information. The generation of the data pulse is in in accordance with a modulation scheme having a modulation order of at least three. Furthermore, the signal encoder includes an output interface. The output interface is configured to sequentially output the first speed pulse, the data pulse, and the second speed pulse.

Apparatuses for encoding and decoding wheel speed sensor signals and methods for communicating encoded wheel speed sensor signals

A magnetic sensor includes a first bridge circuit including a plurality of magnetic field sensor elements, each configured to generate a sensor signal in response to the magnetic field impinging thereon. The first bridge circuit is configured to generate a first differential signal based on sensor signals generated by the plurality of magnetic field sensor elements. The plurality of magnetic field sensor elements include a first, second, and third group of sensor elements. The first group is arranged at center region of the magnetic sensor, the second group is arranged at a first side region of the magnetic sensor and are displaced a first distance from the first group, and the third group is arranged at a second side region of the magnetic sensor, opposite to the first side region, and is displaced a second distance from the first group that is substantially equal to the first distance.

Magnetic speed sensor with a distributed wheatstone bridge

A magnetic sensor may detect a system-level error, associated with a sensor system that includes the magnetic sensor, based on one or more physical parameters as determined at the magnetic sensor. The magnetic sensor may provide an indication of the system-level error in an output signal. The one or more physical parameters may include a temperature at the magnetic sensor, a temperature drift of the magnetic sensor, a supply voltage at the magnetic sensor, an amount of humidity at the magnetic sensor, or an amount of pressure at the magnetic sensor.

Magnetic sensor for system-level diagnostics

A magnetic sensor includes a bridge circuit including a plurality of magnetic field sensor elements, each configured to generate a sensor signal in response to the magnetic field impinging thereon, where the bridge circuit is configured to generate a differential signal based on sensor signals generated by the plurality of magnetic field sensor elements. The bridge circuit further includes a plurality of resistors, where at least one resistor of the plurality of resistors is coupled in parallel to each of the plurality of magnetic field sensor elements.

Stray field suppression in magnetic sensor Wheatstone bridges

A magnetic sensor includes a first bridge circuit including a plurality of magnetic field sensor elements, each configured to generate a sensor signal in response to the magnetic field impinging thereon. The first bridge circuit is configured to generate a first differential signal based on sensor signals generated by the plurality of magnetic field sensor elements. The plurality of magnetic field sensor elements include a first, second, and third pair of sensor elements. The first pair are arranged at center region of the magnetic sensor, the second pair are arranged at a first side region of the magnetic sensor and are displaced a first distance from the first pair, and the third pair are arranged at a second side region of the magnetic sensor, opposite to the first side region, and are displaced a second distance from the first pair that is substantially equal to the first distance.

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Villach, Austria

Simon Hainz