-
51.发明申请公开(公告)号：US20180246177A1
公开(公告)日：2018-08-30
申请号：US15549098
申请日：2016-02-03
发明人： James Geza Deak , Zhimin Zhou
CPC分类号： G01R33/098 , G01R33/0011 , G01R33/0017 , G01R33/09
摘要： A single-chip high-magnetic-field X-axis linear magnetoresistive sensor with a calibration and an initialization coil, comprising a high magnetic field single-chip referenced bridge X-axis magnetoresistive sensor, a calibration coil, and an initialization coil, wherein the calibration coils are planar coils, and the initialization coils are planar or three-dimensional coils. The planar calibration coils and the planar initialization coils can be placed above a substrate and below the magnetoresistive sensor units, between the magnetoresistive sensor units and the soft ferromagnetic flux guides, above the soft ferromagnetic flux guides, or at gaps between the soft ferromagnetic flux guides. The three-dimensional initialization coil is wound around the soft ferromagnetic flux guides and magnetoresistive sensor units. The calibration coils and the initialization coils generate a calibration magnetic field paralleled the direction of pinned layer and a uniform initialization magnetic field in the direction of the free layer respectively at the location of the magnetoresistive sensor units. Through controlling the current of the calibration coils and the initialization coils, the calibration and initialization of the magnetic state of the single-chip X-axis linear magnetoresistive sensor can be performed.
-
公开(公告)号：US20180113179A1
公开(公告)日：2018-04-26
申请号：US15566019
申请日：2016-04-07
发明人： James Geza Deak , Zhimin Zhou
CPC分类号： G01R33/093 , G01B7/30 , G01D5/145 , G01R31/2829 , G01R33/0076 , G01R33/06 , G01R33/09
摘要： A single-package high-field magnetoresistive angle sensor, comprising at least one push-pull magnetoresistive bridge and soft magnetic flux attenuators located on the push-pull magnetoresistive bridge. The push-pull magnetoresistive bridge comprises a plurality of magnetoresistive sensor units. The magnetoresistive sensor units are of an MTJ or GMR type. Each magnetoresistive sensor unit comprises at least one pinned layer, one ferromagnetic reference layer, a nonmagnetic spacer layer, and a ferromagnetic free layer. The ferromagnetic free layer is a low aspect ratio oval or circle, which can make the intensity of magnetization of the ferromagnetic free layer align along an external magnetic field in any direction. The soft magnetic flux attenuator covers the surface of all the magnetoresistive sensor units to attenuate the high intensity external magnetic field to be within a measurable range of the magnetoresistive sensor units; the push-pull magnetoresistive bridge has antiparallel or mutually-orthogonal magnetization directions of the reference layer. The magnetoresistive angle sensor can measure the rotation angle of a high-intensity magnetic field. It has the advantages of low power consumption and small size.
-
公开(公告)号：US09797721B2
公开(公告)日：2017-10-24
申请号：US14894267
申请日：2014-05-28
发明人： James Geza Deak , Zhimin Zhou , Dan Li
CPC分类号： G01C17/28 , G01R33/0005 , G01R33/0011 , G01R33/09
摘要： A three-axis digital compass comprising two X-axis magnetic sensors, two Y-axis magnetic sensors, a flux concentrator, a signal sampling unit, a signal processing unit, and a signal output unit is disclosed. The X-axis and Y-axis magnetic sensors are arranged along a periphery of the flux concentrator. An external magnetic field is distorted when passing through the flux concentrator. An Z axis component of the external magnetic field is converted into X-axis or Y-axis magnetic field components when passing through the flux concentrator, and the so converted components of the external magnetic field act on the X-axis and Y-axis magnetic sensitive sensors. An output signal of the X-axis and Y-axis magnetic sensitive sensors is sent to the signal processing unit through the signal sampling unit, and it is used to calculate the three orthogonal components of the external magnetic field. These calculated external magnetic field components are output in a digital format through the signal output unit. The three-axis digital compass has a novel structure and an elegant computation algorithm. The design is compatible with AMR, GMR, TMR or other magnetoresistive sensor technology.
-
-
搜索结果
53 条记录 (耗时 0.015 秒)
