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).
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Patent number: 11733317Abstract: 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: GrantFiled: May 3, 2022Date of Patent: August 22, 2023Assignee: EVERSPIN TECHNOLOGIES, INC.Inventors: Bradley Neal Engel, Phillip G. Mather
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Publication number: 20220260651Abstract: 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: ApplicationFiled: May 3, 2022Publication date: August 18, 2022Applicant: EVERSPIN TECHNOLOGIES, INC.Inventors: Bradley Neal ENGEL, Phillip G. MATHER
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Patent number: 11353520Abstract: 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: GrantFiled: January 12, 2021Date of Patent: June 7, 2022Assignee: EVERSPIN TECHNOLOGIES, INC.Inventors: Bradley Neal Engel, Phillip G. Mather
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Publication number: 20210199729Abstract: 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: ApplicationFiled: January 12, 2021Publication date: July 1, 2021Applicant: EVERSPIN TECHNOLOGIES, INC.Inventors: Bradley Neal ENGEL, Phillip G. MATHER
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Patent number: 10928463Abstract: 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: GrantFiled: March 20, 2019Date of Patent: February 23, 2021Assignee: EVERSPIN TECHNOLOGIES, INC.Inventors: Bradley Neal Engel, Phillip G. Mather
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Publication number: 20190212399Abstract: 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: ApplicationFiled: March 20, 2019Publication date: July 11, 2019Applicant: EVERSPIN TECHNOLOGIES, INC.Inventors: Bradley Neal ENGEL, Phillip G. MATHER
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Patent number: 10281531Abstract: 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: GrantFiled: November 4, 2016Date of Patent: May 7, 2019Assignee: EVERSPIN TECHNOLOGIES, INC.Inventors: Bradley Neal Engel, Phillip G. Mather
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Patent number: 10168397Abstract: 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: GrantFiled: January 31, 2018Date of Patent: January 1, 2019Assignee: Everspin Technologies, Inc.Inventors: Phillip G. Mather, Bradley Neal Engel, Guido De Sandre
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Publication number: 20180156876Abstract: 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: ApplicationFiled: January 31, 2018Publication date: June 7, 2018Applicant: Everspin Technologies, Inc.Inventors: Phillip G. Mather, Bradley Neal Engel, Guido De Sandre
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Patent number: 9910106Abstract: 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: GrantFiled: April 20, 2016Date of Patent: March 6, 2018Assignee: Everspin Technologies, Inc.Inventors: Phillip G. Mather, Bradley Neal Engel, Guido De Sandre
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Publication number: 20170074948Abstract: 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: ApplicationFiled: November 4, 2016Publication date: March 16, 2017Applicant: EVERSPIN TECHNOLOGIES, INC.Inventors: Bradley Neal ENGEL, Phillip G. MATHER
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Patent number: 9519034Abstract: 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: GrantFiled: September 24, 2014Date of Patent: December 13, 2016Assignee: EVERSPIN TECHNOLOGIES, INC.Inventors: Bradley Neal Engel, Phillip G. Mather
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Publication number: 20160320459Abstract: 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: ApplicationFiled: April 20, 2016Publication date: November 3, 2016Applicant: EVERSPIN TECHNOLOGIES, INC.Inventors: Phillip G. MATHER, Bradley Neal ENGEL, Guido DE SANDRE
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Publication number: 20150331065Abstract: 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: ApplicationFiled: September 24, 2014Publication date: November 19, 2015Applicant: MAXIM INTEGRATED PRODUCTS, INC.Inventors: Bradley Neal Engel, Phillip G. Mather
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Publication number: 20040018611Abstract: 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: ApplicationFiled: July 23, 2002Publication date: January 29, 2004Inventors: Michael Dennis Ward, Piotr Grodzinski, Robin Hui Liu, Bradley Neal Engel, Yingjie Liu
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Publication number: 20030002230Abstract: 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: ApplicationFiled: June 29, 2001Publication date: January 2, 2003Applicant: Storage Technology CorporationInventors: Richard Henry Dee, Bradley Neal Engel