Patents by Inventor Jeffrey Eagen

Jeffrey Eagen 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).

  • Magnetic field sensor with magnetoresistance elements and conductive trace magnetic source
    Patent number: 9605979
    Abstract: In an embodiment, a magnetic field sensor comprises a substrate and a first magnetoresistive element supported by the substrate. The magnetic field sensor also includes a second magnetoresistive element supported by the substrate and coupled in series with the first magnetoresistive element to form a voltage node between the first and second magnetoresistive elements, and at which an output voltage is provided that changes in response to an external magnetic field. The magnetic field sensor also includes a magnetic source that produces a local magnetic field having a strength sufficient to bias the first magnetoresistive element to a resistive value that is substantially resistant to changing in response to the external magnetic field. In embodiments, additional magnetoresistive elements are included to form an H-bridge circuit.
    Type: Grant
    Filed: March 25, 2016
    Date of Patent: March 28, 2017
    Assignee: Allegro MicroSystems, LLC
    Inventors: Jeffrey Eagen, Paul A. David
  • Magnetoresistance Elements With Biasing Magnetic Source
    Publication number: 20160209239
    Abstract: In an embodiment, a magnetic field sensor comprises a substrate and a first magnetoresistive element supported by the substrate. The magnetic field sensor also includes a second magnetoresistive element supported by the substrate and coupled in series with the first magnetoresistive element to form a voltage node between the first and second magnetoresistive elements, and at which an output voltage is provided that changes in response to an external magnetic field. The magnetic field sensor also includes a magnetic source that produces a local magnetic field having a strength sufficient to bias the first magnetoresistive element to a resistive value that is substantially resistant to changing in response to the external magnetic field. In embodiments, additional magnetoresistive elements are included to form an H-bridge circuit.
    Type: Application
    Filed: March 25, 2016
    Publication date: July 21, 2016
    Applicant: Allegro MicroSystems, LLC
    Inventors: Jeffrey Eagen, Paul A. David
  • Magnetic Field Sensor for Sensing a Movement of a Ferromagnetic Target Object
    Publication number: 20160123774
    Abstract: A magnetic field sensor operates as a motion detector for sensing a movement of a ferromagnetic target object having features. The magnetic field sensor has a plurality of magnetoresistance elements to generate, in a first channel, a feature signal indicative of a proximity of a feature of a ferromagnetic target object and, in a second channel, an edge signal indicative of a proximity of an edge of a feature of a ferromagnetic target object.
    Type: Application
    Filed: October 31, 2014
    Publication date: May 5, 2016
    Applicant: ALLEGRO MICROSYSTEMS, LLC
    Inventors: Andrea Foletto, Jeffrey Eagen, Paul A. David
  • Magnetic field sensor with magnetoresistance elements and conductive-trace magnetic source
    Patent number: 9322887
    Abstract: In an embodiment, a magnetic field sensor comprises a substrate and a first magnetoresistive element supported by the substrate. The magnetic field sensor also includes a second magnetoresistive element supported by the substrate and coupled in series with the first magnetoresistive element to form a voltage node between the first and second magnetoresistive elements, and at which an output voltage is provided that changes in response to an external magnetic field. The magnetic field sensor also includes a magnetic source that produces a local magnetic field having a strength sufficient to bias the first magnetoresistive element to a resistive value that is substantially resistant to changing in response to the external magnetic field. In embodiments, additional magnetoresistive elements are included to form an H-bridge circuit.
    Type: Grant
    Filed: December 1, 2014
    Date of Patent: April 26, 2016
    Assignee: Allegro Microsystems, LLC
    Inventors: Jeffrey Eagen, Paul A. David