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公开(公告)号：US11686597B2
公开(公告)日：2023-06-27
申请号：US16434649
申请日：2019-06-07
Applicant: Allegro MicroSystems, LLC
Inventor： Dominik Weiland , Marcus Hagn , Dominik Geisler
IPC: G01D5/14 , G01P3/487 , G01P13/04 , G01R33/028
CPC classification number: G01D5/14 , G01D5/145 , G01P3/487 , G01P13/045 , G01R33/028
Abstract: An apparatus and a method provide an output signal indicative of a speed of rotation and/or a direction of movement of a ferromagnetic object. The sensor includes at least one magnetic field sensing element configured to generate a magnetic field signal in response to a magnetic field associated with an object. The sensor includes a detector configured to generate a detector signal having edges occurring in response to a comparison of the magnetic field signal and the threshold signal. The sensor includes an output circuit configured to generate an output signal having a first format when a characteristic of the magnetic field signal is within a first range and having a second format different than the first format when the characteristic of the magnetic field signal is within a second range, different than the first range.
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公开(公告)号：US11169223B2
公开(公告)日：2021-11-09
申请号：US16826451
申请日：2020-03-23
Applicant: Allegro MicroSystems, LLC
Inventor： Till-Jonas Ostermann , Dominik Geisler , Simon Rock , Fabian Winkler
Abstract: In one aspect, an angle sensor includes a first Hall element disposed on a first axis, a second Hall element disposed on a second axis perpendicular to the first axis and a conduction path having a first portion extending parallel to the first axis and a second portion parallel to the second axis. The conduction path is configured to conduct a calibration current that generates a first magnetic flux density measured at the first Hall element and a second magnetic flux density measured at the second Hall element. The angle sensor also includes calibration circuitry configured to generate one or more compensation signals based on the first and second magnetic flux densities and to adjust an external magnetic flux density measured at the second Hall element due to an external magnetic field using the one or more compensation signals to reduce angle error of the angle sensor.
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公开(公告)号：US20180224516A1
公开(公告)日：2018-08-09
申请号：US15426601
申请日：2017-02-07
Applicant: Allegro Microsystems, LLC
Inventor： Dominik Geisler
IPC: G01R35/00
Abstract: Described embodiments provide circuits, systems and methods for generating a sensing signal in response to the ambient condition, comparing the sensing signal to a threshold hysteresis range to generate a digital signal, and upon powering on the sensor, determining whether the sensing signal is within the threshold hysteresis range and, if the sensing signal is within the threshold hysteresis range, setting the digital signal to a predetermined level based on a hysteresis restoration state associated with sensor before the sensor is powered off.
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公开(公告)号：US10345417B2
公开(公告)日：2019-07-09
申请号：US15426601
申请日：2017-02-07
Applicant: Allegro MicroSystems, LLC
Inventor： Dominik Geisler
Abstract: Described embodiments provide circuits, systems and methods for generating a sensing signal in response to the ambient condition, comparing the sensing signal to a threshold hysteresis range to generate a digital signal, and upon powering on the sensor, determining whether the sensing signal is within the threshold hysteresis range and, if the sensing signal is within the threshold hysteresis range, setting the digital signal to a predetermined level based on a hysteresis restoration state associated with sensor before the sensor is powered off.
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Patent Agency Ranking
公开(公告)号：US10270428B1
公开(公告)日：2019-04-23
申请号：US15876746
申请日：2018-01-22
Applicant: Allegro MicroSystems, LLC
Inventor： Dominik Geisler , Craig S. Petrie
Abstract: A filter with dynamic parameter generation may comprises an input to receive an unfiltered signal, an output to provide a filtered signal, a filtering circuit that filters the unfiltered signal to produce the filtered signal according to a transfer function having at least one dynamic parameter, and a dynamic parameter generator circuit. The dynamic parameter generator circuit comprises an input to receive the unfiltered signal, a signal processing circuit to estimate a level of dynamics of the unfiltered signal, a parameter generation circuit to generate the at least one dynamic parameter based on the estimated level of dynamics of the unfiltered signal, and an output to provide the at least one dynamic parameter.
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公开(公告)号：US10114044B2
公开(公告)日：2018-10-30
申请号：US15805616
申请日：2017-11-07
Applicant: Allegro MicroSystems, LLC
Inventor： Dominik Geisler , Shaun D. Milano
Abstract: A current sensor includes a ferromagnetic core having a substantially central opening for receiving a current conductor and a gap. A detector of the current sensor includes at least one first magnetic field sensing element disposed in a first gap portion and configured to generate a respective first magnetic field signal in response to a first magnetic field having a first angle with respect to the at least one first magnetic field sensing element. The detector also includes at least one second magnetic field sensing element disposed in a second gap portion and configured to generate a respective second magnetic field signal in response to a second magnetic field having a second angle with respect to the at least one second magnetic field sensing element. The first and second magnetic fields are substantially equal in magnitude and the first and second angles are substantially opposite in polarity.
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公开(公告)号：US20210293904A1
公开(公告)日：2021-09-23
申请号：US16826451
申请日：2020-03-23
Applicant: Allegro MicroSystems, LLC
Inventor： Till-Jonas Ostermann , Dominik Geisler , Simon Rock , Fabian Winkler
Abstract: In one aspect, an angle sensor includes a first Hall element disposed on a first axis, a second Hall element disposed on a second axis perpendicular to the first axis and a conduction path having a first portion extending parallel to the first axis and a second portion parallel to the second axis. The conduction path is configured to conduct a calibration current that generates a first magnetic flux density measured at the first Hall element and a second magnetic flux density measured at the second Hall element. The angle sensor also includes calibration circuitry configured to generate one or more compensation signals based on the first and second magnetic flux densities and to adjust an external magnetic flux density measured at the second Hall element due to an external magnetic field using the one or more compensation signals to reduce angle error of the angle sensor.
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公开(公告)号：US10326621B1
公开(公告)日：2019-06-18
申请号：US15968291
申请日：2018-05-01
Applicant: Allegro MicroSystems, LLC
Inventor： Dominik Geisler , Jesse Lapomardo
IPC: H04B3/00 , H04L25/02 , H04B3/06 , H03K17/687
Abstract: A serial communication system includes transmission line and at least one slave device. The at least one slave device comprises an active pull-down element coupled to the transmission line to pull a voltage on the transmission line low during transmission, an active pull-up element coupled to the transmission line to pull the voltage on the transmission line high during or after transmission, and a communication circuit configured to transmit data onto the transmission line according to a SENT protocol by activating the pull-down element and the pull-up element.
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公开(公告)号：US20180059148A1
公开(公告)日：2018-03-01
申请号：US15805616
申请日：2017-11-07
Applicant: Allegro MicroSystems, LLC
Inventor： Dominik Geisler , Shaun D. Milano
CPC classification number: G01R15/202 , G01R15/183 , G01R15/185 , G01R15/186 , G01R15/20 , G01R15/205 , G01R15/207 , G01R31/3606 , G01R33/07 , G01R33/072 , G01R33/098
Abstract: A current sensor includes a ferromagnetic core having a substantially central opening for receiving a current conductor and a gap. A detector of the current sensor includes at least one first magnetic field sensing element disposed in a first gap portion and configured to generate a respective first magnetic field signal in response to a first magnetic field having a first angle with respect to the at least one first magnetic field sensing element. The detector also includes at least one second magnetic field sensing element disposed in a second gap portion and configured to generate a respective second magnetic field signal in response to a second magnetic field having a second angle with respect to the at least one second magnetic field sensing element. The first and second magnetic fields are substantially equal in magnitude and the first and second angles are substantially opposite in polarity.
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