Invention Grant
- Patent Title: Z-axis magnetic sensor with distributed flux guides
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Application No.: US16957719Application Date: 2018-12-20
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Publication No.: US11237231B2Publication Date: 2022-02-01
- Inventor: Anuraag Mohan , Phillip Mather , Guido De Sandre
- Applicant: Robert Bosch GmbH , Anuraag Mohan , Phillip Mather , Guido De Sandre
- Applicant Address: DE Stuttgart; US CA Fremont; US AZ Phoenix; IT Brugherio
- Assignee: Robert Bosch GmbH,Anuraag Mohan,Phillip Mather,Guido De Sandre
- Current Assignee: Robert Bosch GmbH,Anuraag Mohan,Phillip Mather,Guido De Sandre
- Current Assignee Address: DE Stuttgart; US CA Fremont; US AZ Phoenix; IT Brugherio
- Agency: Maginot, Moore & Beck LLP
- International Application: PCT/US2018/066938 WO 20181220
- International Announcement: WO2019/133448 WO 20190704
- Main IPC: G01R33/09
- IPC: G01R33/09

Abstract:
An out-of-plane tunneling magnetoresistive (TMR) magnetic field sensor includes a sense element that defines a sense plane and a flux guide configured to direct a magnetic field perpendicular to the sense plane into the sense plane. The magnetic field sensor further includes a first coil arranged in a first plane, a second coil electrically insulated from the first coil and arranged in a spaced-apart second plane, and drive circuitry operatively connected to the first coil and the second coil. The drive circuitry in a first mode energizes the first and second coils to generate respective first and second fields that combine to set a magnetization of the flux guide. The drive circuitry in a second mode energizes only the first coil to generate the first field so as to set a magnetization of the sense element without changing the magnetization of the flux guide.
Public/Granted literature
- US20200371171A1 Z-Axis Magnetic Sensor with Distributed Flux Guides Public/Granted day:2020-11-26
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