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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
Applicant: Melexis Technologies SA
Inventor： Yves Bidaux
Abstract: 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：US20220137161A1
公开(公告)日：2022-05-05
申请号：US17506098
申请日：2021-10-20
Applicant: Melexis Technologies SA
Inventor： Yves BIDAUX , Lionel TOMBEZ
Abstract: 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：US20220091161A1
公开(公告)日：2022-03-24
申请号：US17479181
申请日：2021-09-20
Applicant: Melexis Technologies SA
Inventor： Simon HOUIS
Abstract: A current sensor system for accurately measuring an AC electrical current having frequencies up to 2 kHz, the system comprising: an electrical conductor (e.g. busbar) for conducting said AC current thereby creating a first magnetic field; a magnetic sensor device for measuring a magnetic field component or gradient; an object (e.g. a metal plate) having an electrically conductive surface arranged in the vicinity of said conductor for allowing eddy currents to flow in said surface, thereby creating a second magnetic field which is superimposed with the first magnetic field; wherein the magnetic sensor device is configured for determining the current as a signal or value proportional to the measured component or gradient. The metal plate may have an opening. The current sensor system may further comprise a shielding.
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公开(公告)号：US11255698B2
公开(公告)日：2022-02-22
申请号：US16874077
申请日：2020-05-14
Applicant: Melexis Technologies SA
Inventor： Javier Bilbao De Mendizabal , Christian Schott , Lionel Tombez
Abstract: A position sensor arrangement, comprising: a magnetic source and a position sensor device movably arranged relative to each other; the latter comprising at least three magnetic sensors for measuring said magnetic field; a processing unit for determining a position based on a ratio of a first pairwise difference and a second pairwise difference, the first pairwise difference being a difference of a first pair of two signals, the second pairwise difference signal being a difference of a second pair of two signals. A method of determining a position, by performing said measurements, and by calculating said differences and said ratio. A method of calibrating said position sensor, including the step of storing at least one parameter or a look-up table in a non-volatile memory. A method of auto-calibration.
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公开(公告)号：US20210302207A1
公开(公告)日：2021-09-30
申请号：US17203039
申请日：2021-03-16
Applicant: Melexis Technologies SA
Inventor： Lorenzo LUGANI
Abstract: A position sensor for determining the position of a conductive target, includes: a transmit coil; a first, second and third receive coil wherein each receive coil comprises a first (A) and second (B) conductive strand obtained from a substantially sinusoidal primitive function, wherein the primitive function of the second strand is the primitive function of the first strand shifted over 180°, and the primitive function of the second receive coil is the primitive function of the first receive coil shifted over 60°, and wherein the primitive function of the third receive coil is the primitive function of the first receive coil shifted over 120°; an integrated circuit configured for exciting the transmit coil, and for reading the signals from the receive coils or a combination of the signals, and for processing these signals and removing a common mode signal.
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Patent Agency Ranking
公开(公告)号：US20210302200A1
公开(公告)日：2021-09-30
申请号：US17213613
申请日：2021-03-26
Applicant: Melexis Technologies SA
Inventor： Eric SACHSE , Gael CLOSE
Abstract: A position sensor device includes position sensor elements for generating analog sense signals. A digitization circuit is provided for a digital signal representative of the input phase based on the analog sense signals and a digital processing unit. An output signal is indicative of the position based on the first output of the processing unit. The processing unit comprises an error signal generator for computing an error signal indicative of a phase difference between the digital signal and a feedback signal. A digital filter filters the error signal to generate the first output. A feedback path provides the feedback signal based on the first output and a filter selector to select a filter to be applied from different filters. At least one input on which a common filter circuit operates is scaled differently for each of the different filters to select different filter bandwidths.
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公开(公告)号：US11067645B2
公开(公告)日：2021-07-20
申请号：US16361973
申请日：2019-03-22
Applicant: Melexis Technologies SA
Inventor： Jian Chen , Orlin Gueorguiev Saradjov
IPC: G01R33/00 , H01L23/495 , H05K3/34 , H05K3/30
Abstract: A sensor comprises a housing; and a lead frame comprising at least three elongated leads having an exterior portion extending from the housing; and a magnetic sensor circuit disposed in the housing, and connected to the lead frame. The housing comprises two recesses arranged on two opposite sides of the housing for allowing the sensor to be mounted to a support. The lead frame may further comprise a plurality of tabs disposed between the elongated leads, for use as test pins. A component assembly comprising said sensor mounted on a support between deformable protrusions. A method of making said component assembly, comprising the step of positioning said component on the support between said protrusions, and deforming said protrusions such that they are at least partially disposed within the recesses.
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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
Applicant: Melexis Technologies SA
Inventor： Yves Bidaux , Jean-Claude Depoorter , Jan-Willem Burssens
Abstract: 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：US10698009B2
公开(公告)日：2020-06-30
申请号：US15886046
申请日：2018-02-01
Applicant: Melexis Technologies SA
Inventor： Johan L. Raman , Pieter Rombouts
Abstract: A method of biasing and reading-out a passive resistive sensor structure having two excitation nodes and two readout nodes, comprises the steps of: a) determining a first state of a first capacitor corresponding to a first amount of charge biasing the sensor structure such that a biasing current flows through said first capacitor during a first time interval determining a second state of the first capacitor corresponding to a second amount of charge integrating or averaging the readout signal during a second time interval related to the first time interval, thereby obtaining an integrated or averaged readout signal determining the sensor readout signal based on the integrated or averaged readout signal and a change in state of the first capacitor.
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公开(公告)号：US10554219B2
公开(公告)日：2020-02-04
申请号：US16378794
申请日：2019-04-09
Applicant: MELEXIS TECHNOLOGIES SA
Inventor： Johan Raman , Pieter Rombouts
IPC: H03M3/00
Abstract: An analog-to-digital converter comprises a first quantizer arranged for yielding a first digital signal; an error signal generation block arranged for generating an error signal representative of a difference between an analog input signal and the first digital signal; an analog loop filter arranged for receiving the error signal; a second quantizer arranged for receiving an output signal of the analog loop filter and for outputting a second digital signal; a digital loop filter arranged for receiving the second digital signal and for providing an input signal to the first quantizer; and a recombiner block comprising a first recombination and a second recombination filter, and an adder circuit for adding outputs of the first and second recombination filters. The first and second recombination filters are selected to obtain an analog-to-digital converted output signal being less dependent on quantization noise caused by the first quantizer than a first digital signal.
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