公开(公告)号：US12055667B2

公开(公告)日：2024-08-06

申请号：US17160724

申请日：2021-01-28

Applicant: Melexis Technologies NV

Inventor： Andreas Ott

IPC: G01C3/08 ,  G01S7/32 ,  G01S7/48 ,  G01S7/4913

CPC classification number: G01S7/4913 ,  G01S7/32 ,  G01S7/4808

Abstract: An apparatus (100) comprises a light source that emits light modulated selectively at first and second modulation frequencies. A photonic mixer cell (102) generates and stores a plurality of electrical output signals respectively corresponding to phase offset values applied in accordance with an indirect time of flight technique and in respect of the selected modulation frequency. A signal processing circuit processes a first number of the electrical output signals at the first modulation frequency to calculate a first measurement phase angle (φ1) from a calculated first measurement vector, and a second number of the electrical output signals at the second modulation frequency to calculate a second measurement phase angle (φ2) from a second calculated measurement vector. A phase angle difference (Δφ) between the first and second measurement phase angles (φ1, φ2) is then calculated and a correction value (φcorr) applied to the phase angle difference (Δφ) to yield an extended range phase angle (φext) for calculating a range.

公开(公告)号：US20230254959A1

公开(公告)日：2023-08-10

申请号：US18165672

申请日：2023-02-07

Applicant: Melexis Technologies NV

Inventor： Michael FREY ,  Jorgen STURM ,  Thomas FREITAG

IPC: H05B45/50 ,  H05B47/17 ,  H05B47/18

CPC classification number: H05B45/50 ,  H05B47/17 ,  H05B47/18

Abstract: A safety related light system includes: one light source, a first control circuit, and a second control circuit. One of the first control circuit or the second control circuit is selectively enabled to operate in a drive mode to operate the one light source.

公开(公告)号：US20230094526A1

公开(公告)日：2023-03-30

申请号：US18057324

申请日：2022-11-21

Applicant: Melexis Technologies NV

Inventor： Samuel HUBER LINDENBERGER ,  Javier BILBAO DE MENDIZABAL

IPC: G01R35/00 ,  G01R33/022

Abstract: A magnetic sensor device comprises a substrate. A first magnetic sensor, a second magnetic sensor, and one or more inductors are disposed over the substrate and are controlled by a magnetic sensor controller having a control circuit. The control circuit is adapted for controlling the first magnetic sensor to measure magnetic fields under presence of a first set of magnetic fields, and for controlling the second magnetic sensor to measure magnetic fields under presence of a second set of magnetic fields generated by the inductors. The control circuit calculates a relative sensitivity matching value that converts magnetic field values measured by the second magnetic sensor to a comparable magnetic field value measured by the first magnetic sensor or vice versa. The control circuit is further adapted for correcting a measurement by the second magnetic sensor using the relative sensitivity matching value to produce a corrected measurement, and for calculating a magnetic field gradient by combining a measurement by the first magnetic sensor with the corrected measurement.

公开(公告)号：US11507525B2

公开(公告)日：2022-11-22

申请号：US17362226

申请日：2021-06-29

Applicant: Melexis Technologies NV

Inventor： Eric Sachse ,  Torsten Bacher ,  Thomas Freitag

IPC: G06F13/362 ,  G06F13/40 ,  G06F13/42

Abstract: A method for communicating between a master and a plurality of slaves includes generating a communication frame including generating a slave data frame in each slave. The slave data frame has a data packet including one or more data bytes and at least one gap of variable time length comprising no information in the slave data frame. The gap may be at the beginning of said slave data frame before the beginning of the first data byte of said data packet and/or at the end of said data packet after the end of a last data byte of said data packet, where the gaps have a time length dependency based on parameters locally stored in each of said at least one slave. The slave data frame is transmitted sequentially where the gap increases for each subsequent slave.

公开(公告)号：US20220337263A1

公开(公告)日：2022-10-20

申请号：US17724198

申请日：2022-04-19

Applicant: Melexis Technologies NV

Inventor： Johan VERGAUWEN

IPC: H03M1/10

Abstract: A sensor interface circuit includes at least two sensor inputs and at least two front-end circuits to obtain sensor signal acquisitions from the at least two sensor inputs; a test circuit configured to test correct functionality of at least part of one of the front end circuits by applying a test input to the front end circuit under test, by reading a test output of the front end circuit, and by comparing the test output with an expected result thus obtaining at least one test result. The test input is applied intermittently between sensor signal acquisitions; a processing device is configured to compare the sensor signal acquisitions from the different sensor inputs and combine the comparison with the at least one test result to evaluate correct functionality of the sensor interface circuit.

公开(公告)号：US11366016B2

公开(公告)日：2022-06-21

申请号：US16866698

申请日：2020-05-05

Applicant: Melexis Technologies NV

Inventor： Viktor Kassovski ,  Slaveyko Ivanov Slaveykov ,  Aleksandar Ivanov Gargavelov ,  Luc Buydens

IPC: G01J5/12 ,  G01J5/06 ,  G01J5/10 ,  G01J5/16 ,  G01J5/56 ,  G01J5/53 ,  G01J5/068 ,  G01J5/80

Abstract: A method of measuring temperature based upon a system of equations applying Stefan-Boltzmann's law and using a measurement value for an object to be measured and an ambient temperature value (Ta) comprises: pre-calculating (200, 202) a first vector (LUT1) and a second vector (LUT2). The first vector (LUT1) is a series of values proportional to received power based upon respective temperature values and in respect of a predetermined generic range of temperatures. The second vector (LUT2) is a series of sensitivity characteristic factor values based upon expected measured temperature values and in respect of a predetermined range of expected object measured temperatures. The first vector (LUT1) and the second vector (LUT2) are used (206) to generate a temporary vector (LUTT) of a series of values limited to the ambient temperature value to solve the system of equations in respect of the measurement value for the object, thereby determining (208) a temperature (To) for the object from the measurement value.

公开(公告)号：US11287345B2

公开(公告)日：2022-03-29

申请号：US16440440

申请日：2019-06-13

Applicant: Melexis Technologies NV

Inventor： Jan-Willem Burssens

IPC: G01L19/00 ,  G01L19/06 ,  C23C14/16

Abstract: The invention relates to sensors comprising a substrate, a platinum component having a first surface facing toward the substrate and a second surface facing away from the substrate, a protective covering over the platinum component, the protective covering comprising one or more layers, at least on of which is an oxygen getter material, a lower surface in physical contact with the second surface of the platinum component, and an upper surface; and a method for forming such a sensor. The protective covering with oxygen getter material protects the platinum component against oxygen dissolution therein, thereby reducing sensor drift.

公开(公告)号：US11281576B2

公开(公告)日：2022-03-22

申请号：US16878962

申请日：2020-05-20

Applicant: Melexis Technologies NV

Inventor： Nicolas Vielcanet ,  Philippe Laugier ,  Thomas Freitag ,  Benoit Heroux

IPC: G06F12/14 ,  G06F12/02 ,  G06F9/30 ,  G06F9/48 ,  G06F11/07 ,  G06F11/32

Abstract: A memory device includes a non-volatile memory block, a protection unit arranged for connecting to a communication bus, and a sequencer arranged to receive commands from the protection unit. A logic circuit is arranged to output an enabling signal, and includes first and second logic subcircuits, and a combiner logic circuit.

公开(公告)号：US11193835B2

公开(公告)日：2021-12-07

申请号：US16190384

申请日：2018-11-14

Applicant: Melexis Technologies NV

Inventor： Viktor Kassovski ,  Kostadin Bobchev ,  Ivan Lesichkov

IPC: G01K7/00 ,  G01K7/10 ,  G01K1/08 ,  G01K7/02 ,  G01R31/28 ,  G01R27/08 ,  G01K15/00

Abstract: A circuit for determining and/or compensating for a measurement error of a sheathed sensor due to a property of a sheath of that sheathed sensor comprises a first and a second terminal for connecting to a pair of sensor signal leads of a sensor element in a sheathed sensor and a voltage measurement circuit. A switching unit controls switching an electrical connection between a first and a second state. A correction measurement circuit generates a correction signal indicative of that a measured current running from the first terminal through the switching unit. A controller receives the measurement and correction signal in both the first and second state, and calculates an error value indicative of the measurement error and/or a sensor readout value that is corrected for the measurement error by taking the measurement and correction signal into account as obtained in both the first and second state.

公开(公告)号：US20210376839A1

公开(公告)日：2021-12-02

申请号：US17329814

申请日：2021-05-25

Applicant: Melexis Technologies NV

Inventor： Johan VERGAUWEN

IPC: H03L7/099 ,  G01R19/252 ,  G01D3/00 ,  G01D5/16

Abstract: An oscillator-based sensor interface circuit includes first and second input nodes arranged to receive first and second electrical signals representative of an electrical quantity, respectively; an analog filter; a first oscillator arranged to receive a first oscillator input signal and a second oscillator different from the first oscillator and arranged to receive a second oscillator input signal; a comparator arranged to compare signals coming from the first and second oscillators; a first feedback element arranged to receive a representation of the digital comparator output signal and to convert the representation into a first feedback signal to be applied to the oscillation means; a digital filter arranged to yield an output signal, being an filtered version of the digital comparator output signal; a second feedback element arranged to receive the output signal and to convert the output signal into a second feedback signal.