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xmr sensor device

A sensor device, magnetoresistive sensor technology, applied in the direction of measuring the geometric arrangement of magnetic sensing elements, instruments, measuring magnetic variables, etc., can solve the problems of increased jitter, magnetic field sensitivity, inaccurate positioning, etc.

Active Publication Date: 2019-01-22
INFINEON TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, XMR sensors are sensitive to magnetic fields orthogonal to the sensing direction
Due to this, for example imprecise positioning of an XMR sensor relative to a pole wheel or other movable magnetic device can cause increased jitter

Method used

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Embodiment Construction

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Abstract

XMR sensor device. Sensor apparatus and methods are provided, wherein a second stack of magnetoresistive sensors is provided on top of a first stack of magnetoresistive sensors.

Description

technical field The present application relates to XMR sensor devices and corresponding methods. Background technique Magnetic field sensors are used in many applications. For speed or movement detection, for example, magnets may be provided on so-called pole wheels, whereby a modulated magnetic field is generated when the pole wheels rotate. The modulation of this field can then be detected by a magnetic field sensor. The thus detected magnetic field and its modulation are then indicative, for example, of the rotational speed of the pole wheel. As an alternative to pole wheels, for example gears or linear magnetic elements which generate a modulated magnetic field when moving can also be used. And other applications use magnetic field sensors, such as magnetic storage devices, such as hard disks. Magnetic field sensors include Hall sensors and sensors based on the magnetoresistance (MR) effect (also known as XMR sensors). In many cases, XMR sensors exhibit lower jitte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R33/09H10N50/10H10N50/01
CPCG01R33/0005G01R33/09
Inventor K.普吕格尔
Owner INFINEON TECH AG