Method for forming a sensor circuit

    公开(公告)号:US11768086B2

    公开(公告)日:2023-09-26

    申请号:US16456905

    申请日:2019-06-28

    Abstract: A method for forming a sensor circuit. The method includes forming a plurality of magnetoresistive structures having a first predefined reference magnetization direction in a first common area of a common semiconductor substrate; forming a plurality of magnetoresistive structures having a second predefined reference magnetization direction in a second common area of the common semiconductor substrate; and forming electrically conductive structures electrically coupling the magnetoresistive structures having the first predefined reference magnetization direction to the magnetoresistive structures having the second predefined reference magnetization direction to form a plurality of half-bridge sensor circuits, wherein each half-bridge sensor circuit comprises a magnetoresistive structure having the first predefined reference magnetization direction electrically coupled to a second magnetoresistive structure having the second predefined reference magnetization direction.

    Gas concentration detection by means of thermoacoustic sound wave

    公开(公告)号:US11635410B2

    公开(公告)日:2023-04-25

    申请号:US17446507

    申请日:2021-08-31

    Abstract: A gas sensor having a heater, a receiver, and a space arranged between the heater and the receiver, is described, the heater being configured to generate a thermoacoustic sound wave propagating through the space by using a stimulation signal. The receiver is in this case configured to receive the thermoacoustic sound wave that has propagated through the space and to convert it into a reception signal that has a time-of-flight-dependent shift with respect to the stimulation signal and therefore information relating to the gas concentration in the space.

    Photoacoustic sensor, method for checking a gas-tightness, and system

    公开(公告)号:US10900932B2

    公开(公告)日:2021-01-26

    申请号:US16203859

    申请日:2018-11-29

    Abstract: An example of a system comprises a volume filled with a gas, a gas excitation device configured to excite the gas inside the volume, a microphone configured to output a microphone signal on the basis of the gas excited by the gas excitation device, and a testing unit configured to take the microphone signal as a basis for testing a gas-tightness of the volume. An example of a photoacoustic sensor comprises a hermetically sealed sensor cell, a gas excitation device and a testing unit configured to take the microphone signal dependent on the thermally excited gas as a basis for testing a gas-tightness of the sensor cell. One example comprises a method for testing a gas-tightness of a volume filled with a gas.

    Power converter including current sensor for providing information indicating a safe operation

    公开(公告)号:US09933506B2

    公开(公告)日:2018-04-03

    申请号:US15358234

    申请日:2016-11-22

    Abstract: An example of a power converter is disclosed. At least one converter module provides an alternating output voltage. The converter module is coupled to an output terminal by a conductor path. A current sensor is placed within a magnetic field generated by a current through the conductor path. The current sensor includes at least one magneto-resistive sensing element to provide a sensor signal in response to the magnetic field. A signal generator causes a magnetic self-test field at the magneto-resistive sensing element. A readout circuit receives a first sensor signal of the magneto-resistive sensing element before the magnetic self-test field is applied and a second sensor signal of the magneto-resistive sensing element after the magnetic self-test field is applied. An evaluation circuit determines information indicating a safe operation of the current sensor based on an evaluation of the first sensor signal and the second sensor signal.

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