Patents by Inventor Bradley Neal Engel

Bradley Neal Engel 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: 11733317
    Abstract: A chopping technique, and associated structure, is implemented to cancel the magnetic 1/f noise contribution in a Tunneling Magnetoresistance (TMR) field sensor. The TMR field sensor includes a first bridge circuit including multiple TMR elements to sense a magnetic field and a second circuit to apply a bipolar current pulse adjacent to each TMR element. The current lines are serially or sequentially connected to a current source to receive the bipolar current pulse. The field sensor has an output including a high output and a low output in response to the bipolar pulse. This asymmetric response allows a chopping technique for 1/f noise reduction in the field sensor.
    Type: Grant
    Filed: May 3, 2022
    Date of Patent: August 22, 2023
    Assignee: EVERSPIN TECHNOLOGIES, INC.
    Inventors: Bradley Neal Engel, Phillip G. Mather
  • Publication number: 20220260651
    Abstract: A chopping technique, and associated structure, is implemented to cancel the magnetic 1/f noise contribution in a Tunneling Magnetoresistance (TMR) field sensor. The TMR field sensor includes a first bridge circuit including multiple TMR elements to sense a magnetic field and a second circuit to apply a bipolar current pulse adjacent to each TMR element. The current lines are serially or sequentially connected to a current source to receive the bipolar current pulse. The field sensor has an output including a high output and a low output in response to the bipolar pulse. This asymmetric response allows a chopping technique for 1/f noise reduction in the field sensor.
    Type: Application
    Filed: May 3, 2022
    Publication date: August 18, 2022
    Applicant: EVERSPIN TECHNOLOGIES, INC.
    Inventors: Bradley Neal ENGEL, Phillip G. MATHER
  • Patent number: 11353520
    Abstract: A chopping technique, and associated structure, is implemented to cancel the magnetic 1/f noise contribution in a Tunneling Magnetoresistance (TMR) field sensor. The TMR field sensor includes a first bridge circuit including multiple TMR elements to sense a magnetic field and a second circuit to apply a bipolar current pulse adjacent to each TMR element. The current lines are serially or sequentially connected to a current source to receive the bipolar current pulse. The field sensor has an output including a high output and a low output in response to the bipolar pulse. This asymmetric response allows a chopping technique for 1/f noise reduction in the field sensor.
    Type: Grant
    Filed: January 12, 2021
    Date of Patent: June 7, 2022
    Assignee: EVERSPIN TECHNOLOGIES, INC.
    Inventors: Bradley Neal Engel, Phillip G. Mather
  • Publication number: 20210199729
    Abstract: A chopping technique, and associated structure, is implemented to cancel the magnetic 1/f noise contribution in a Tunneling Magnetoresistance (TMR) field sensor. The TMR field sensor includes a first bridge circuit including multiple TMR elements to sense a magnetic field and a second circuit to apply a bipolar current pulse adjacent to each TMR element. The current lines are serially or sequentially connected to a current source to receive the bipolar current pulse. The field sensor has an output including a high output and a low output in response to the bipolar pulse. This asymmetric response allows a chopping technique for 1/f noise reduction in the field sensor.
    Type: Application
    Filed: January 12, 2021
    Publication date: July 1, 2021
    Applicant: EVERSPIN TECHNOLOGIES, INC.
    Inventors: Bradley Neal ENGEL, Phillip G. MATHER
  • Patent number: 10928463
    Abstract: A chopping technique, and associated structure, is implemented to cancel the magnetic 1/f noise contribution in a Tunneling Magnetoresistance (TMR) field sensor. The TMR field sensor includes a first bridge circuit including multiple TMR elements to sense a magnetic field and a second circuit to apply a bipolar current pulse adjacent to each TMR element. The current lines are serially or sequentially connected to a current source to receive the bipolar current pulse. The field sensor has an output including a high output and a low output in response to the bipolar pulse. This asymmetric response allows a chopping technique for 1/f noise reduction in the field sensor.
    Type: Grant
    Filed: March 20, 2019
    Date of Patent: February 23, 2021
    Assignee: EVERSPIN TECHNOLOGIES, INC.
    Inventors: Bradley Neal Engel, Phillip G. Mather
  • Publication number: 20190212399
    Abstract: A chopping technique, and associated structure, is implemented to cancel the magnetic 1/f noise contribution in a Tunneling Magnetoresistance (TMR) field sensor. The TMR field sensor comprises a first bridge circuit including multiple TMR elements to sense a magnetic field and a second circuit to apply a bipolar current pulse adjacent to each TMR element. The current lines are serially or sequentially connected to a current source to receive the bipolar current pulse. The field sensor has an output comprising a high output and a low output in response to the bipolar pulse. This asymmetric response allows a chopping technique for 1/f noise reduction in the field sensor.
    Type: Application
    Filed: March 20, 2019
    Publication date: July 11, 2019
    Applicant: EVERSPIN TECHNOLOGIES, INC.
    Inventors: Bradley Neal ENGEL, Phillip G. MATHER
  • Patent number: 10281531
    Abstract: A chopping technique, and associated structure, is implemented to cancel the magnetic 1/f noise contribution in a Tunneling Magnetoresistance (TMR) field sensor. The TMR field sensor includes a first bridge circuit including multiple TMR elements to sense a magnetic field and a second circuit to apply a bipolar current pulse adjacent to each TMR element. The current lines are serially or sequentially connected to a current source to receive the bipolar current pulse. The field sensor has an output comprising a high output and a low output in response to the bipolar pulse. This asymmetric response allows a chopping technique for 1/f noise reduction in the field sensor.
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: May 7, 2019
    Assignee: EVERSPIN TECHNOLOGIES, INC.
    Inventors: Bradley Neal Engel, Phillip G. Mather
  • Patent number: 10168397
    Abstract: A magnetic field sensor includes a plurality of transducer legs coupled together as a first circuit to sense a magnetic field, wherein each transducer leg comprises a plurality of magnetoresistance sense elements. The magnetic field sensor also includes a second circuit including a first plurality of current lines, wherein each current line of the first plurality of current lines is adjacent to a corresponding plurality of magnetoresistance sense elements of a transducer leg of the plurality of transducer legs. When at least one current line of the first plurality of current lines is energized, a magnetization of each magnetoresistance sense element of the transducer leg is aligned in a first direction or a second direction opposite to the first direction. A routing pattern of the at least one current line is configured to generate an equal population of magnetoresistance sense elements with magnetization aligned in the first and second directions.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: January 1, 2019
    Assignee: Everspin Technologies, Inc.
    Inventors: Phillip G. Mather, Bradley Neal Engel, Guido De Sandre
  • Publication number: 20180156876
    Abstract: A magnetic field sensor includes a plurality of transducer legs coupled together as a first circuit to sense a magnetic field, wherein each transducer leg comprises a plurality of magnetoresistance sense elements. The magnetic field sensor also includes a second circuit including a first plurality of current lines, wherein each current line of the first plurality of current lines is adjacent to a corresponding plurality of magnetoresistance sense elements of a transducer leg of the plurality of transducer legs. When at least one current line of the first plurality of current lines is energized, a magnetization of each magnetoresistance sense element of the transducer leg is aligned in a first direction or a second direction opposite to the first direction. A routing pattern of the at least one current line is configured to generate an equal population of magnetoresistance sense elements with magnetization aligned in the first and second directions.
    Type: Application
    Filed: January 31, 2018
    Publication date: June 7, 2018
    Applicant: Everspin Technologies, Inc.
    Inventors: Phillip G. Mather, Bradley Neal Engel, Guido De Sandre
  • Patent number: 9910106
    Abstract: A magnetic field sensor includes a plurality of transducer legs coupled together as a first circuit to sense a magnetic field, wherein each transducer leg comprises a plurality of magnetoresistance sense elements. The magnetic field sensor also includes a second circuit including a first plurality of current lines, wherein each current line of the first plurality of current lines is adjacent to a corresponding plurality of magnetoresistance sense elements of a transducer leg of the plurality of transducer legs. When at least one current line of the first plurality of current lines is energized, a magnetization of each magnetoresistance sense element of the transducer leg is aligned in a first direction or a second direction opposite to the first direction. A routing pattern of the at least one current line is configured to generate an equal population of magnetoresistance sense elements with magnetization aligned in the first and second directions.
    Type: Grant
    Filed: April 20, 2016
    Date of Patent: March 6, 2018
    Assignee: Everspin Technologies, Inc.
    Inventors: Phillip G. Mather, Bradley Neal Engel, Guido De Sandre
  • Publication number: 20170074948
    Abstract: A chopping technique, and associated structure, is implemented to cancel the magnetic 1/f noise contribution in a Tunneling Magnetoresistance (TMR) field sensor. The TMR field sensor comprises a first bridge circuit including multiple TMR elements to sense a magnetic field and a second circuit to apply a bipolar current pulse adjacent to each TMR element. The current lines are serially or sequentially connected to a current source to receive the bipolar current pulse. The field sensor has an output comprising a high output and a low output in response to the bipolar pulse. This asymmetric response allows a chopping technique for 1/f noise reduction in the field sensor.
    Type: Application
    Filed: November 4, 2016
    Publication date: March 16, 2017
    Applicant: EVERSPIN TECHNOLOGIES, INC.
    Inventors: Bradley Neal ENGEL, Phillip G. MATHER
  • Patent number: 9519034
    Abstract: A chopping technique, and associated structure, is implemented to cancel the magnetic 1/f noise contribution in a Tunneling Magnetoresistance (TMR) field sensor. The TMR field sensor includes a first bridge circuit including multiple TMR elements to sense a magnetic field and a second circuit to apply a bipolar current pulse adjacent to each TMR element. The current lines are serially or sequentially connected to a current source to receive the bipolar current pulse. The field sensor provides a high output and a low output in response to the bipolar pulse. This asymmetric response allows a chopping technique for 1/f noise reduction in the field sensor.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: December 13, 2016
    Assignee: EVERSPIN TECHNOLOGIES, INC.
    Inventors: Bradley Neal Engel, Phillip G. Mather
  • Publication number: 20160320459
    Abstract: A system, device, and method are disclosed for a tunneling magnetoresistance (TMR) magnetic sensor to effectively increase magnetic field measurement linearity and minimize cross-axis interference. The TMR magnetic sensor comprises a plurality of transducer legs, each having multiple sense elements. The TMR magnetic sensor comprises a plurality of built-in current lines located adjacent to each sense element. The current lines are routed such that two or more sense elements have magnetic responses that have opposing contributions from the cross-axis effect for a given field direction in each transducer leg within the TMR magnetic sensor. Therefore, the overall field response from each transducer leg is internally compensated and the TMR magnetic sensor has an output with minimal cross-axis interference.
    Type: Application
    Filed: April 20, 2016
    Publication date: November 3, 2016
    Applicant: EVERSPIN TECHNOLOGIES, INC.
    Inventors: Phillip G. MATHER, Bradley Neal ENGEL, Guido DE SANDRE
  • Publication number: 20150331065
    Abstract: A chopping technique, and associated structure, is implemented to cancel the magnetic 1/f noise contribution in a Tunneling Magnetoresistance (TMR) field sensor. The TMR field sensor comprises a first bridge circuit including multiple TMR elements to sense a magnetic field and a second circuit to apply a bipolar current pulse adjacent to each TMR element. The current lines are serially or sequentially connected to a current source to receive the bipolar current pulse. The field sensor has an output comprising a high output and a low output in response to the bipolar pulse. This asymmetric response allows a chopping technique for 1/f noise reduction in the field sensor.
    Type: Application
    Filed: September 24, 2014
    Publication date: November 19, 2015
    Applicant: MAXIM INTEGRATED PRODUCTS, INC.
    Inventors: Bradley Neal Engel, Phillip G. Mather
  • Publication number: 20040018611
    Abstract: The present invention provides microfluidic devices that can be used to effect a number of manipulations on a sample to ultimately result in target analyte detection or quantification. The device provides at least one magnetic microchannel that is capable of separating magnetic or magnetically-labeled target analytes from non-magnetic materials. Further, a magnetic microchannel may sort materials according to their magnetic response. Alternatively, magnetic or magnetically-labeled components other than the target analytes can be retained by the magnetic microchannel and are thus removed from the target analytes. Depending on the specificity of the binding ligand, one can either separate a vast population of analytes sharing a common binding motif, or specifically retain a rare target analyte because of its recognition of a specific ligand on the magnetic particle.
    Type: Application
    Filed: July 23, 2002
    Publication date: January 29, 2004
    Inventors: Michael Dennis Ward, Piotr Grodzinski, Robin Hui Liu, Bradley Neal Engel, Yingjie Liu
  • Publication number: 20030002230
    Abstract: Apparatus and methods for reducing the sensitivity of spin valve sensor read heads for magnetic tape applications are provided. The apparatus and methods compromise the large output gain derived from using state of the art spin valve sensors in order to reduce the flux capture and thus, the signal distortion in the spin valve sensor. In order to provide a reduced sensitivity spin valve sensor, one or more of the basic sensitivity of the spin valve, the flux carrying capability of the free layer, and the flux injection efficiency of the spin valve head structure are modified to reduce the flux capture by the sensing layer.
    Type: Application
    Filed: June 29, 2001
    Publication date: January 2, 2003
    Applicant: Storage Technology Corporation
    Inventors: Richard Henry Dee, Bradley Neal Engel