Patents by Inventor Shaun D. Milano

Shaun D. Milano 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).

  • Patent number: 10908190
    Abstract: Systems and methods described herein are directed towards differential current sensing a current sensor having two or more magnetic field sensing elements that are oriented to sense a magnetic field generated by a current through an external conductor in the same direction. The current sensor can be positioned such that at least one first magnetic field sensing element is vertically aligned with the external conductor and at least one second magnetic field sensing element is not vertically aligned with the external conductor. The magnetic field sensing elements may be spaced from each to measure a gradient field and can generate a magnetic field signal indicative of a distance between the respective magnetic field sensing element and the current carrying external conductor. A difference between the magnetic field signals can be determined that is indicative of the current through the external conductor.
    Type: Grant
    Filed: September 30, 2019
    Date of Patent: February 2, 2021
    Assignee: Allegro MicroSystems, LLC
    Inventors: Wade Bussing, Alexander Latham, Shaun D. Milano, Christian Feucht
  • Patent number: 10761120
    Abstract: Systems and methods are described herein for reducing the effects of magnetic field cross-coupling in a multi-conductor current sensor system. A current sensor system includes one or more current sensors, each positioned proximate to at least one conductor and spaced from at least one other conductor. Each conductor carries a current intended to be measured by a respective current sensor. The current sensors include one or more magnetic field sensing elements to generate a magnetic field signal indicative of a detected magnetic field. A characterization measurement is performed to determine the coupling between each current sensor and the respective current conductor and to determine the coupling between the current sensor and the other ones of the current conductors, by providing a reference current to each of the conductors and measuring the outputs at each of the current sensors. The characterization measurement can be used to generate a coupling matrix.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: September 1, 2020
    Assignee: Allegro MicroSystems, LLC
    Inventors: Christian Feucht, Shaun D. Milano
  • Patent number: 10753963
    Abstract: A current sensor integrated circuit includes a lead frame having a primary conductor and at least one secondary lead, a semiconductor die disposed adjacent to the primary conductor, an insulation structure disposed between the primary conductor and the semiconductor die, and a non-conductive insulative material enclosing the semiconductor die, the insulation structure, a first portion of the primary conductor, and a first portion of the at least one secondary lead to form a package. The first portion of the at least one secondary lead (between a first end proximal to the primary conductor and a second end proximal to the second, exposed portion of the at least one secondary lead) has a thickness that is less than a thickness of the second, exposed portion of the least one secondary lead. A distance between the second, exposed portion of the primary conductor and the second, exposed portion of the at least one secondary lead is at least 7.2 mm.
    Type: Grant
    Filed: May 30, 2019
    Date of Patent: August 25, 2020
    Assignee: Allegro MicroSystems, LLC
    Inventors: Shaun D. Milano, Shixi Louis Liu
  • Patent number: 10725100
    Abstract: Methods and apparatus for magnetic field sensor having a sensing element, an analog circuit path coupled to the sensing element for generating an output voltage in response to a magnetic field applied to the sensing element, and a coil in proximity to the sensing element, the coil having a first terminal that is accessible external to the magnetic field sensor.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: July 28, 2020
    Assignee: Allegro MicroSystems, LLC
    Inventors: Shaun D. Milano, Michael C. Doogue, William P. Taylor
  • Publication number: 20200057120
    Abstract: Systems and methods described herein provide a current sensor based on magnetic field detection having multiple sensor arrangements with multiple, different sensitivity ranges. The outputs of the multiple sensor arrangements can be combined to generate a single output signal. The current sensor can include two or more sensor arrangements, each having one or more magnetic field sensing elements, and configured to sense a magnetic field in different first measurement ranges corresponding to different ranges of currents through the conductor and further configured to generate different magnetic field signals indicative of the sensed magnetic field in the respective measurement range. The current sensor can include a circuit configured to generate an output signal indicative of a combination of the different magnetic field signals that corresponds to the current through the conductor.
    Type: Application
    Filed: August 20, 2018
    Publication date: February 20, 2020
    Applicants: Allegro MicroSystems, LLC, Commissariat à l'énergie atomique et aux énergies alternatives
    Inventors: Noémie Belin, Shaun D. Milano, Wade Bussing, Claude Fermon
  • Publication number: 20200049760
    Abstract: Methods and apparatus for providing an integrated circuit having a drive current source, a magnetic sensing element coupled to the drive current source, the magnetic sensing element having first and second differential outputs, and first and second current elements to provide respective currents in relation to the drive current source, wherein the first current element is coupled to the first differential output and the second current element is coupled to the second differential output. In illustrative embodiments, an IC output can output a voltage corresponding to the currents of the first and second current elements.
    Type: Application
    Filed: October 17, 2019
    Publication date: February 13, 2020
    Applicant: Allegro MicroSystems, LLC
    Inventors: Shaun D. Milano, Georges El Bacha, Michael C. Doogue, David J. Haas, Gregory Delmain, Michael Gaboury, William P. Taylor
  • Publication number: 20200025804
    Abstract: Systems and methods described herein are directed towards differential current sensing a current sensor having two or more magnetic field sensing elements that are oriented to sense a magnetic field generated by a current through an external conductor in the same direction. The current sensor can be positioned such that at least one first magnetic field sensing element is vertically aligned with the external conductor and at least one second magnetic field sensing element is not vertically aligned with the external conductor. The magnetic field sensing elements may be spaced from each to measure a gradient field and can generate a magnetic field signal indicative of a distance between the respective magnetic field sensing element and the current carrying external conductor. A difference between the magnetic field signals can be determined that is indicative of the current through the external conductor.
    Type: Application
    Filed: September 30, 2019
    Publication date: January 23, 2020
    Applicant: Allegro MicroSystems, LLC
    Inventors: Wade Bussing, Alexander Latham, Shaun D. Milano, Christian Feucht
  • Patent number: 10488458
    Abstract: Methods and apparatus for providing an integrated circuit having a drive current source, a magnetic sensing element coupled to the drive current source, the magnetic sensing element having first and second differential outputs, and first and second current elements to provide respective currents in relation to the drive current source, wherein the first current element is coupled to the first differential output and the second current element is coupled to the second differential output. In illustrative embodiments, an IC output can output a voltage corresponding to the currents of the first and second current elements.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: November 26, 2019
    Assignee: Allegro MicroSystems, LLC
    Inventors: Shaun D. Milano, Georges El Bacha, Michael C. Doogue, David J. Haas, Gregory Delmain, Michael Gaboury, William P. Taylor
  • Patent number: 10481181
    Abstract: Systems and methods described herein are directed towards differential current sensing a current sensor having two or more magnetic field sensing elements that are oriented to sense a magnetic field generated by a current through an external conductor in the same direction. The current sensor can be positioned such that at least one first magnetic field sensing element is vertically aligned with the external conductor and at least one second magnetic field sensing element is not vertically aligned with the external conductor. The magnetic field sensing elements may be spaced from each to measure a gradient field and can generate a magnetic field signal indicative of a distance between the respective magnetic field sensing element and the current carrying external conductor. A difference between the magnetic field signals can be determined that is indicative of the current through the external conductor.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: November 19, 2019
    Assignee: Allegro MicroSystems, LLC
    Inventors: Wade Bussing, Alexander Latham, Shaun D. Milano, Christian Feucht
  • Publication number: 20190285667
    Abstract: Systems and methods described herein are directed towards integrating a shield layer into a current sensor to shield a magnetic field sensing element and associated circuitry in the current sensor from electrical, voltage, or electrical transient noise. In an embodiment, a shield layer may be disposed along at least one surface of a die supporting a magnetic field sensing element. The shield layer may be disposed in various arrangements to shunt noise caused by a parasitic coupling between the magnetic field sensing element and the current carrying conductor away from the magnetic field sensing element.
    Type: Application
    Filed: May 24, 2019
    Publication date: September 19, 2019
    Applicant: Allegro MicroSystems, LLC
    Inventors: Shaun D. Milano, Bryan Cadugan, Michael C. Doogue, Alexander Latham, William P. Taylor, Harianto Wong, Sundar Chetlur
  • Publication number: 20190277889
    Abstract: A current sensor integrated circuit includes a lead frame having a primary conductor and at least one secondary lead, a semiconductor die disposed adjacent to the primary conductor, an insulation structure disposed between the primary conductor and the semiconductor die, and a non-conductive insulative material enclosing the semiconductor die, the insulation structure, a first portion of the primary conductor, and a first portion of the at least one secondary lead to form a package. The first portion of the at least one secondary lead (between a first end proximal to the primary conductor and a second end proximal to the second, exposed portion of the at least one secondary lead) has a thickness that is less than a thickness of the second, exposed portion of the least one secondary lead. A distance between the second, exposed portion of the primary conductor and the second, exposed portion of the at least one secondary lead is at least 7.2 mm.
    Type: Application
    Filed: May 30, 2019
    Publication date: September 12, 2019
    Applicant: Allegro MicroSystems, LLC
    Inventors: Shaun D. Milano, Shixi Louis Liu
  • Patent number: 10352969
    Abstract: Systems and methods described herein are directed towards integrating a shield layer into a current sensor to shield a magnetic field sensing element and associated circuitry in the current sensor from electrical, voltage, or electrical transient noise. In an embodiment, a shield layer may be disposed along at least one surface of a die supporting a magnetic field sensing element. The shield layer may be disposed in various arrangements to shunt noise caused by a parasitic coupling between the magnetic field sensing element and the current carrying conductor away from the magnetic field sensing element.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: July 16, 2019
    Assignee: Allegro MicroSystems, LLC
    Inventors: Shaun D. Milano, Bryan Cadugan, Michael C. Doogue, Alexander Latham, William P. Taylor, Harianto Wong, Sundar Chetlur
  • Patent number: 10345343
    Abstract: A current sensor integrated circuit includes a lead frame having a primary conductor and at least one secondary lead, a semiconductor die disposed adjacent to the primary conductor, an insulation structure disposed between the primary conductor and the semiconductor die, and a non-conductive insulative material enclosing the semiconductor die, the insulation structure, a first portion of the primary conductor, and a first portion of the at least one secondary lead to form a package. The first portion of the at least one secondary lead (between a first end proximal to the primary conductor and a second end proximal to the second, exposed portion of the at least one secondary lead) has a thickness that is less than a thickness of the second, exposed portion of the least one secondary lead. A distance between the second, exposed portion of the primary conductor and the second, exposed portion of the at least one secondary lead is at least 7.2 mm.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: July 9, 2019
    Assignee: Allegro MicroSystems, LLC
    Inventors: Shaun D. Milano, Shixi Louis Liu
  • Patent number: 10333055
    Abstract: Methods for providing a sensor integrated circuit package including employing a conductive leadframe and forming a non-conductive die paddle in relation to the leadframe. The method can further include placing a die on the non-conductive die paddle to form an assembly, forming at least one electrical connection between the die and the leadframe, and overmolding the assembly to form an integrated circuit package.
    Type: Grant
    Filed: March 2, 2017
    Date of Patent: June 25, 2019
    Assignee: Allegro MicroSystems, LLC
    Inventors: Shaun D. Milano, Michael C. Doogue, William P. Taylor
  • Patent number: 10247758
    Abstract: A current sensor includes a ferromagnetic core having a substantially central opening for receiving a current conductor and at least two gaps portions, each of the gap portions having an associated gap spacing. A detector of the current sensor includes at least one first sensing element disposed in a first one of the gap portions and configured to generate a respective first magnetic field signal in response to a first magnetic field generated in the first gap portion in response to a current through the current conductor. The detector also includes at least one second sensing element disposed in a second one of the gap portions and configured to generate a respective second magnetic field signal in response to a second magnetic field generated in the second gap portion in response to the current through the conductor. A method of sensing a current through a current conductor is also provided.
    Type: Grant
    Filed: August 8, 2016
    Date of Patent: April 2, 2019
    Assignee: ALLEGRO MICROSYSTEMS, LLC
    Inventors: Shaun D. Milano, Peter Cisar, Stefan Kranz, Stephan Schurt
  • Patent number: 10114044
    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.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: October 30, 2018
    Assignee: Allegro MicroSystems, LLC
    Inventors: Dominik Geisler, Shaun D. Milano
  • Publication number: 20180306843
    Abstract: Systems and methods described herein are directed towards differential current sensing a current sensor having two or more magnetic field sensing elements that are oriented to sense a magnetic field generated by a current through an external conductor in the same direction. The current sensor can be positioned such that at least one first magnetic field sensing element is vertically aligned with the external conductor and at least one second magnetic field sensing element is not vertically aligned with the external conductor. The magnetic field sensing elements may be spaced from each to measure a gradient field and can generate a magnetic field signal indicative of a distance between the respective magnetic field sensing element and the current carrying external conductor. A difference between the magnetic field signals can be determined that is indicative of the current through the external conductor.
    Type: Application
    Filed: April 25, 2017
    Publication date: October 25, 2018
    Applicant: Allegro Microsystems, LLC
    Inventors: Wade Bussing, Alexander Latham, Shaun D. Milano, Christian Feucht
  • Patent number: 10073136
    Abstract: Methods and apparatus to provide an integrated circuit having a magnetic sensing element having differential first and second outputs and an input, the input to receive current and first and second switches coupled to a respective one of the differential first and second outputs. A first voltage source is coupled between the first and second switches, the first and second switches having a first state in which the first voltage source is coupled across the differential first and second outputs, and an IC output can output a voltage corresponding to the first voltage source when the first and second switches are in the first state for monitoring operation of a signal path from the magnetic sensing element to the IC output.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: September 11, 2018
    Assignee: ALLEGRO MICROSYSTEMS, LLC
    Inventors: Shaun D. Milano, Georges El Bacha, Michael C. Doogue, William P. Taylor
  • Publication number: 20180238938
    Abstract: Systems and methods are described herein for reducing the effects of magnetic field cross-coupling in a multi-conductor current sensor system. A current sensor system includes one or more current sensors, each positioned proximate to at least one conductor and spaced from at least one other conductor. Each conductor carries a current intended to be measured by a respective current sensor. The current sensors include one or more magnetic field sensing elements to generate a magnetic field signal indicative of a detected magnetic field. A characterization measurement is performed to determine the coupling between each current sensor and the respective current conductor and to determine the coupling between the current sensor and the other ones of the current conductors, by providing a reference current to each of the conductors and measuring the outputs at each of the current sensors. The characterization measurement can be used to generate a coupling matrix.
    Type: Application
    Filed: February 17, 2017
    Publication date: August 23, 2018
    Applicant: Allegro Microsystems, LLC
    Inventors: Christian Feucht, Shaun D. Milano
  • Publication number: 20180149677
    Abstract: Systems and methods described herein are directed towards integrating a shield layer into a current sensor to shield a magnetic field sensing element and associated circuitry in the current sensor from electrical, voltage, or electrical transient noise. In an embodiment, a shield layer may be disposed along at least one surface of a die supporting a magnetic field sensing element. The shield layer may be disposed in various arrangements to shunt noise caused by a parasitic coupling between the magnetic field sensing element and the current carrying conductor away from the magnetic field sensing element.
    Type: Application
    Filed: November 29, 2016
    Publication date: May 31, 2018
    Applicant: Allegro MicroSystems, LLC
    Inventors: Shaun D. Milano, Bryan Cadugan, Michael C. Doogue, Alexander Latham, William P. Taylor, Harianto Wong, Sundar Chetlur