Patents by Inventor Thomas Kerdraon
Thomas Kerdraon has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11892476Abstract: Current sensor packages are described including a leadframe configured to carry a current to be sensed and a current sensor that is electrically isolated from the leadframe. The current sensor is disposed adjacent to a first portion of the leadframe that includes a plurality of notches. An encapsulating material is configured to encapsulate the current sensor and at least a part of the first portion of the leadframe that is adjacent to the current sensor and includes the plurality of notches. The current sensor includes a substrate, a first magnetic field sensing element that is formed on the substrate, and a second magnetic field sensing element that is formed on the substrate. The first magnetic field sensing element and the second magnetic field sensing element are disposed on opposite sides of a central axis of the first portion of the leadframe.Type: GrantFiled: February 15, 2022Date of Patent: February 6, 2024Assignee: Allegro MicroSystems, LLCInventors: Simon E. Rock, Thomas Kerdraon, Yannick Vuillermet, Loïc André Messier, Andreas P. Friedrich
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Publication number: 20230258693Abstract: Current sensor packages are described including a leadframe configured to carry a current to be sensed and a current sensor that is electrically isolated from the leadframe. The current sensor is disposed adjacent to a first portion of the leadframe that includes a plurality of notches. An encapsulating material is configured to encapsulate the current sensor and at least a part of the first portion of the leadframe that is adjacent to the current sensor and includes the plurality of notches. The current sensor includes a substrate, a first magnetic field sensing element that is formed on the substrate, and a second magnetic field sensing element that is formed on the substrate. The first magnetic field sensing element and the second magnetic field sensing element are disposed on opposite sides of a central axis of the first portion of the leadframe.Type: ApplicationFiled: February 15, 2022Publication date: August 17, 2023Applicant: Allegro MicroSystems, LLCInventors: Simon E. Rock, Thomas Kerdraon, Yannick Vuillermet, Loïc André Messier, Andreas P. Friedrich
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Patent number: 10598515Abstract: A magnetic field sensor includes a back bias magnet to generate a DC magnetic field. First and second magnetic field sensing elements of the magnetic field sensor are disposed proximate to at least one ferromagnetic surface of a ferromagnetic target object. The first and second magnetic field sensing elements generate first and second electronic signals, respectively, in response to first and second sensed magnetic fields corresponding to the DC magnetic field but influenced by the at least one ferromagnetic surface. The magnetic field sensor generates a difference signal that is a difference of amplitudes of the first and second electronic signals. The difference signal is indicative of a rotation measurement of an absolute relative rotation of the ferromagnetic target object and the magnetic field sensor about a rotation axis.Type: GrantFiled: December 7, 2017Date of Patent: March 24, 2020Assignee: Allegro MicroSystems, LLCInventors: Simon Tima, Yannick Vuillermet, Andreas P. Friedrich, Thomas Kerdraon
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Patent number: 10480957Abstract: In one aspect, an integrated circuit (IC) includes a magnetic field sensor to detect speed and direction of angular rotation of a rotating magnetic structure. The magnetic field sensor includes at least two magnetic field sensing elements configured to sense changes in a magnetic field caused by rotation of the magnetic structure. The IC also includes an output port configured to provide an output signal of the magnetic field sensor. The output signal indicates the angular direction and one of the speed or a fault.Type: GrantFiled: July 20, 2017Date of Patent: November 19, 2019Assignee: Allegro MicroSystems, LLCInventors: Thomas Kerdraon, Gary T. Pepka, Dominikus Maisl, Manfred Busch
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Patent number: 10436606Abstract: In one aspect, an integrated circuit (IC) includes a magnetic field sensor to detect an angular speed and an angular direction of a rotating magnetic structure. The magnetic field sensor includes at least two magnetic field sensing elements configured to sense changes in a magnetic field caused by rotation of the magnetic structure. The IC also includes an output port configured to provide an output signal of the magnetic field sensor. The output signal indicates the angular direction and the speed.Type: GrantFiled: July 20, 2017Date of Patent: October 8, 2019Assignee: Allegro MicroSystems, LLCInventors: Thomas Kerdraon, Gary T. Pepka, Dominikus Maisl, Manfred Busch
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Patent number: 10408639Abstract: A shifting device with two positive-locking shifting element halves includes a positive connection between the shifting element halves that is able to be established or released. The respective prevailing operating states of the shifting element halves are determined through a sensor device. The surface areas of an encoder contour relative to a measuring device are formed in a convex or concave manner, whereas a perpendicular gap between the surface areas of the encoder contour and a permanent magnet, starting from a joint area between the surface areas in the direction of an end area of the surface areas increases or decreases in each case.Type: GrantFiled: December 17, 2015Date of Patent: September 10, 2019Assignees: ZF FRIEDRICHSHAFEN AG, ALLEGRO MICROSYSTEMS, LLCInventors: Stefan Hakspiel, Thomas Kerdraon, Andreas P. Friedrich
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Publication number: 20190025082Abstract: In one aspect, an integrated circuit (IC) includes a magnetic field sensor to detect speed and direction of angular rotation of a rotating magnetic structure. The magnetic field sensor includes at least two magnetic field sensing elements configured to sense changes in a magnetic field caused by rotation of the magnetic structure. The IC also includes an output port configured to provide an output signal of the magnetic field sensor. The output signal indicates the angular direction and one of the speed or a fault.Type: ApplicationFiled: July 20, 2017Publication date: January 24, 2019Applicant: Allegro MicroSystems, LLCInventors: Thomas Kerdraon, Gary T. Pepka, Dominikus Maisl, Manfred Busch
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Publication number: 20190025081Abstract: In one aspect, an integrated circuit (IC) includes a magnetic field sensor to detect an angular speed and an angular direction of a rotating magnetic structure. The magnetic field sensor includes at least two magnetic field sensing elements configured to sense changes in a magnetic field caused by rotation of the magnetic structure. The IC also includes an output port configured to provide an output signal of the magnetic field sensor. The output signal indicates the angular direction and the speed.Type: ApplicationFiled: July 20, 2017Publication date: January 24, 2019Applicant: Allegro MicroSystems, LLCInventors: Thomas Kerdraon, Gary T. Pepka, Dominikus Maisl, Manfred Busch
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Publication number: 20180094951Abstract: A magnetic field sensor includes a back bias magnet to generate a DC magnetic field. First and second magnetic field sensing elements of the magnetic field sensor are disposed proximate to at least one ferromagnetic surface of a ferromagnetic target object. The first and second magnetic field sensing elements generate first and second electronic signals, respectively, in response to first and second sensed magnetic fields corresponding to the DC magnetic field but influenced by the at least one ferromagnetic surface. The magnetic field sensor generates a difference signal that is a difference of amplitudes of the first and second electronic signals. The difference signal is indicative of a rotation measurement of an absolute relative rotation of the ferromagnetic target object and the magnetic field sensor about a rotation axis.Type: ApplicationFiled: December 7, 2017Publication date: April 5, 2018Applicant: Allegro MicroSystems, LLCInventors: Simon Tima, Yannick Vuillermet, Andreas P. Friedrich, Thomas Kerdraon
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Patent number: 9869566Abstract: A magnetic field sensor includes a back bias magnet to generate a DC magnetic field. First and second magnetic field sensing elements of the magnetic field sensor are disposed proximate to at least one ferromagnetic surface of a ferromagnetic target object. The first and second magnetic field sensing elements generate first and second electronic signals, respectively, in response to first and second sensed magnetic fields corresponding to the DC magnetic field but influenced by the at least one ferromagnetic surface. The magnetic field sensor generates a difference signal that is a difference of amplitudes of the first and second electronic signals. The difference signal is indicative of a rotation measurement of an absolute relative rotation of the ferromagnetic target object and the magnetic field sensor about a rotation axis.Type: GrantFiled: February 12, 2016Date of Patent: January 16, 2018Assignee: Allegro MicroSystems, LLCInventors: Simon Tima, Yannick Vuillermet, Andreas P. Friedrich, Thomas Kerdraon
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Publication number: 20170234702Abstract: A magnetic field sensor includes a back bias magnet to generate a DC magnetic field. First and second magnetic field sensing elements of the magnetic field sensor are disposed proximate to at least one ferromagnetic surface of a ferromagnetic target object. The first and second magnetic field sensing elements generate first and second electronic signals, respectively, in response to first and second sensed magnetic fields corresponding to the DC magnetic field but influenced by the at least one ferromagnetic surface. The magnetic field sensor generates a difference signal that is a difference of amplitudes of the first and second electronic signals. The difference signal is indicative of a rotation measurement of an absolute relative rotation of the ferromagnetic target object and the magnetic field sensor about a rotation axis.Type: ApplicationFiled: February 12, 2016Publication date: August 17, 2017Applicant: Allegro Microsystems, LLCInventors: Simon Tima, Yannick Vuillermet, Andreas P. Friedrich, Thomas Kerdraon
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Patent number: 9664497Abstract: A magnetic field sensor with a magnet is disposed proximate to a ferromagnetic target object having at least one ferromagnetic surface. The magnetic field sensor is operable to sense a relative location between the magnetic field sensor and the ferromagnetic target object along a movement line. In some embodiments, the target object is also spinning about a rotation axis parallel to the movement line. A corresponding method is described.Type: GrantFiled: December 15, 2014Date of Patent: May 30, 2017Assignee: Allegro MicroSystems, LLCInventors: Thomas Kerdraon, Andreas P. Friedrich, Yannick Vuillermet
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Patent number: 9383425Abstract: Methods and apparatus for an integrated circuit having a magnetic sensing element, a fault detection module including circuitry to detect a fault condition and to self-test operation of the circuitry to detect the fault. The integrated circuit includes a fault pin to indicate the fault condition.Type: GrantFiled: December 28, 2012Date of Patent: July 5, 2016Assignee: Allegro Microsystems, LLCInventors: Shaun D. Milano, Thomas Kerdraon, Georges El Bacha, Michael Gaboury, Michael C. Doogue
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Publication number: 20160178401Abstract: A shifting device (1) with two positive-locking shifting element halves (2) is described. A positive connection between the shifting element halves (2) is able to be established or released. The respective prevailing operating states of the shifting element halves (2) can be determined through a sensor device (3). The surface areas (7, 8) of the encoder contour (6) relative to a measuring device (5) are formed in a convex or concave manner, whereas a perpendicular gap between the surface areas (7, 8) of the encoder contour (6) and the permanent magnet (4), starting from a joint area (9) between the surface areas (7, 8) in the direction of an end area (10, 11) of the surface areas (7, 8), increases or decreases in each case.Type: ApplicationFiled: December 17, 2015Publication date: June 23, 2016Inventors: Stefan Hakspiel, Thomas Kerdraon, Andreas P. Friedrich
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Publication number: 20150176962Abstract: A magnetic field sensor with a magnet is disposed proximate to a ferromagnetic target object having at least one ferromagnetic surface. The magnetic field sensor is operable to sense a relative location between the magnetic field sensor and the ferromagnetic target object along a movement line. In some embodiments, the target object is also spinning about a rotation axis parallel to the movement line. A corresponding method is described.Type: ApplicationFiled: December 15, 2014Publication date: June 25, 2015Applicant: ALLEGRO MICROSYSTEMS, LLCInventors: Thomas Kerdraon, Andreas P. Friedrich, Yannick Vuillermet
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Publication number: 20140184200Abstract: Methods and apparatus for an integrated circuit having a magnetic sensing element, a fault detection module including circuitry to detect a fault condition and to self-test operation of the circuitry to detect the fault. The integrated circuit includes a fault pin to indicate the fault condition.Type: ApplicationFiled: December 28, 2012Publication date: July 3, 2014Inventors: Shaun D. Milano, Thomas Kerdraon, Georges El Bacha, Michael Gaboury, Michael C. Doogue