A magnetoresistive sensor with widened linear range by harmonics
A magnetoresistance sensor and magnetoresistance technology, applied in the field of magnetic sensors, can solve the problems of a push-pull linear tunnel magnetoresistance sensor with a narrow linear range and the like
Active Publication Date: 2021-07-06
MULTIDIMENSION TECH CO LTD
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Problems solved by technology
[0004] The linear range of the existing push-pull linear tunnel magnetoresistive sensor is narrow
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[0030] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described through implementation with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the embodiment of the present invention. Some, but not all, embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0031] An embodiment of the present invention provides a magnetoresistive sensor with a harmonic widening linear range, and the magnetoresistance sensor may be a push-pull linear magnetoresistance sensor based on tunneling magnetoresistance technology. The magnetoresistive sensor provided in this embodiment includes: a substrate; a multiple push-pull mag...
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Abstract
The embodiment of the present invention discloses a magnetoresistive sensor with a harmonically widened linear range, which includes: a substrate and a plurality of push-pull magnetoresistive sensing bridges, the push arm of which contains N kinds of push magnetoresistive sensing units, which The pull arm contains N kinds of pull magnetoresistive sensing units; the key characteristic parameters of each magnetoresistance sensing unit include R0 i 、MR i 、H si , ±α pi and a i , the key characteristic parameters of the push-pull magnetoresistive sensing unit and its corresponding pull magnetoresistive sensing unit are different from the key characteristic parameters of the standard magnetoresistive sensing unit of the standard push-pull linear magnetoresistive sensor, there is at least one set of key characteristics Parameters [(RO j , MR j , H sj , ±α pj ), a j ], the linear part and the nonlinear harmonic part of the R‑H characteristic curve representing the push-pull magnetoresistance sensing unit and the pull magnetoresistance sensing unit are superimposed, so that the linear range of the multiple push-pull magnetoresistance sensing bridge is larger than the standard Linear range of push-pull linear magnetoresistive sensors. The embodiments of the present invention have the effect of widening the linear range of harmonics.
Description
technical field [0001] Embodiments of the present invention relate to magnetic sensor technology, and in particular to a magnetoresistive sensor with harmonically widened linear range. Background technique [0002] The magnetoresistive sensing unit includes a free layer, a pinning layer and an intermediate insulating layer. In actual use, the push-pull linear tunnel magnetoresistive sensor includes a push magnetoresistive sensing unit and a pull magnetoresistive sensing unit, and the angle difference anglePL-angleFL between the magnetic moments of the free layer and the pinned layer is 90° and -90°, where anglePL is the pinning layer magnetic moment orientation angle α p , angleFL is the free layer magnetic moment orientation angle α f . [0003] The relationship between the resistance R of the push-pull linear tunnel magnetoresistive sensor and the external magnetic field H is related to the zero magnetic field resistance R0 of the magnetoresistive sensing unit, the magn...
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IPC IPC(8): G01R33/09G01R33/00
CPCG01R33/093G01R33/0094G01R33/098G01R33/0017
Inventor 詹姆斯·G·迪克周志敏
Owner MULTIDIMENSION TECH CO LTD