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公开(公告)号：US20210348945A1
公开(公告)日：2021-11-11
申请号：US16867721
申请日：2020-05-06
发明人： Yves Bidaux
摘要： A position sensor system for determining a position of a sensor device relative to a magnetic structure, the system comprising: said magnetic structure comprising a plurality of poles; said sensor device comprising a plurality of magnetic sensors; the magnetic structure being movable relative to the sensor device, or vice versa; wherein: a distance between centres of adjacent poles varies along the movement direction; the sensor device is adapted: for determining a first magnetic field component parallel to, and a second magnetic field component perpendicular to a movement direction, and for calculating a fine signal based on a ratio of the first and second magnetic field component; and for determining a coarse signal based on components and/or gradients; and for determining said position based on the coarse signal and the fine signal.
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公开(公告)号：US11788866B2
公开(公告)日：2023-10-17
申请号：US18090206
申请日：2022-12-28
发明人： Lionel Tombez , Yves Bidaux , Gael Close
摘要： A position sensor device comprising two or more magnetic sensors capable of measuring one or two or three orthogonal magnetic field components at various sensor locations; and a processing circuit for determining a first, a second and a third difference of two respective components, and for determining a first ratio of the first and second difference, and determining and outputting a first angle based on this first ratio; and for determining a second ratio of the first and third difference, for optionally determining a second angle, optionally comparing the two angles or the two ratios; and for outputting at least one of: the second angle, the two ratios, a diagnostic signal based on a comparison of the angles or ratios.
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3.发明授权公开(公告)号：US11785865B2
公开(公告)日：2023-10-10
申请号：US17519809
申请日：2021-11-05
发明人： Appo Van Der Wiel , Yves Bidaux , Lionel Tombez
CPC分类号： H10N52/101 , G01R33/072 , H10N50/80
摘要： A method of producing a semiconductor substrate comprising at least one integrated magnetic flux concentrator, comprising the steps of: a) providing a semiconductor substrate having an upper surface; b) making at least one cavity in said upper surface; c) depositing one or more layers of one or more materials, including sputtering at least one layer of a soft magnetic material; d) removing substantially all of the soft magnetic material that is situated outside of the at least one cavity, while leaving at least a portion of the soft magnetic material that is inside said at least one cavity. A semiconductor substrate comprising at least one integrated magnetic flux concentrator. A sensor device or a sensor system, a current sensor device or system, a position sensor device or system, a proximity sensor device or system, an integrated transformer device or system.
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公开(公告)号：US20230160979A1
公开(公告)日：2023-05-25
申请号：US18147170
申请日：2022-12-28
发明人： Nicolas Dupre , Yves Bidaux
IPC分类号： G01R33/022 , G01R33/00 , G01R33/07
CPC分类号： G01R33/022 , G01R33/0082 , G01R33/07
摘要： A method of determining a gradient of a magnetic field, includes the steps of: biasing a first/second magnetic sensor with a first/second biasing signal; measuring and amplifying a first/second magnetic sensor signal; measuring a temperature and/or a stress difference; adjusting at least one of: the second biasing signal, the second amplifier gain, the amplified and digitized second sensor value using a predefined function f(T) or f(T, ΔΣ) or f(ΔΣ) of the measured temperature and/or the measured differential stress before determining a difference between the first/second signal/value derived from the first/second sensor signal. A magnetic sensor device is configured for performing this method, as well as a current sensor device, and a position sensor device.
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公开(公告)号：US11846687B2
公开(公告)日：2023-12-19
申请号：US18147170
申请日：2022-12-28
发明人： Nicolas Dupre , Yves Bidaux
IPC分类号： G01R33/07 , G01R33/022 , G01R33/00
CPC分类号： G01R33/022 , G01R33/0082 , G01R33/07
摘要： A method of determining a gradient of a magnetic field, includes the steps of: biasing a first/second magnetic sensor with a first/second biasing signal; measuring and amplifying a first/second magnetic sensor signal; measuring a temperature and/or a stress difference; adjusting at least one of: the second biasing signal, the second amplifier gain, the amplified and digitized second sensor value using a predefined function f(T) or f(T, ΔΣ) or f(ΔΣ) of the measured temperature and/or the measured differential stress before determining a difference between the first/second signal/value derived from the first/second sensor signal. A magnetic sensor device is configured for performing this method, as well as a current sensor device, and a position sensor device.
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公开(公告)号：US11796609B2
公开(公告)日：2023-10-24
申请号：US17506098
申请日：2021-10-20
发明人： Yves Bidaux , Lionel Tombez
CPC分类号： G01R33/07 , H10N52/01 , H10N52/101 , H10N52/80
摘要： An integrated sensor device includes: a semiconductor substrate comprising a horizontal Hall element, and an integrated magnetic flux concentrator located substantially above said horizontal Hall element, wherein the first magnetic flux concentrator has a shape with a geometric center which is aligned with a geometric centre of the horizontal Hall element; and wherein the shape has a height H and a transversal dimension D, wherein H≥30 μm and/or wherein (H/D)≥25%. The integrated magnetic flux concentrator may be partially incorporated in the “interconnection stack”. A method is provided for producing such an integrated sensor device.
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公开(公告)号：US11326868B2
公开(公告)日：2022-05-10
申请号：US16867692
申请日：2020-05-06
发明人： Yves Bidaux
摘要： A position sensor system for determining a position of a sensor device relative to a magnetic structure, the system comprising: said magnetic structure comprising a plurality of non-equidistant poles; said sensor device comprising at least three magnetic sensors spaced apart over predefined distances; and the sensor device being adapted for: a) measuring at least three in-plane magnetic field components, and for calculating two in-plane field gradients therefrom; b) measuring at least three out-of-plane magnetic field components, and for calculating two out-of-plane field gradients therefrom; c) calculating a coarse signal based on these gradients; d) calculating a fine signal based on these gradients; e) determining said position based on the coarse signal and the fine signal.
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公开(公告)号：US10942042B2
公开(公告)日：2021-03-09
申请号：US16249139
申请日：2019-01-16
摘要： A sensor system comprises a magnetic field generator and a sensor device arranged at a distance from said magnetic field generator and adapted for measuring or determining at least one magnetic field component and/or at least one magnetic field gradient component. The magnetic field generator comprises a multi-pole magnet having a number N of pole pairs that are axially magnetized to generate an N-pole magnetic field that is substantially rotationally symmetric around an axis. The magnet comprises a plurality of grooves and/or elongate protrusions that are arranged in a rotationally symmetric pattern around the axis to provide a substantially constant magnetic field gradient in a central region around said axis.
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公开(公告)号：US11892325B2
公开(公告)日：2024-02-06
申请号：US17207301
申请日：2021-03-19
发明人： Nicolas Dupre , Yves Bidaux
摘要： A method of determining a linear or angular position of a magnetic sensor device relative to a magnetic source, or vice versa, the sensor device includes at least four magnetic sensor elements. The method involves the steps of: a) determining a first magnetic field gradient; b) determining a second magnetic field gradient; c) determining a ratio of the first and second magnetic field gradient; d) converting the ratio into a position; while matching signal paths of the magnetic sensor elements so as to improve signal-to-noise.
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公开(公告)号：US11293784B2
公开(公告)日：2022-04-05
申请号：US16867721
申请日：2020-05-06
发明人： Yves Bidaux
摘要： A position sensor system for determining a position of a sensor device relative to a magnetic structure, the system comprising: said magnetic structure comprising a plurality of poles; said sensor device comprising a plurality of magnetic sensors; the magnetic structure being movable relative to the sensor device, or vice versa; wherein: a distance between centres of adjacent poles varies along the movement direction; the sensor device is adapted: for determining a first magnetic field component parallel to, and a second magnetic field component perpendicular to a movement direction, and for calculating a fine signal based on a ratio of the first and second magnetic field component; and for determining a coarse signal based on components and/or gradients; and for determining said position based on the coarse signal and the fine signal.
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