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Magnetoresistive sensor as temperature sensor

A magnetic sensor and sensor element technology, applied in the field of detectors, can solve problems such as system errors, and achieve the effect of improving stability and reducing drift

Inactive Publication Date: 2009-04-22
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If binding kinetics were the basis for analyte concentration measurements, temperature fluctuations during assay incubation would lead to systematic errors in the measured target concentrations

Method used

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  • Magnetoresistive sensor as temperature sensor
  • Magnetoresistive sensor as temperature sensor
  • Magnetoresistive sensor as temperature sensor

Examples

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Embodiment Construction

[0039] The present invention will be described below with reference to certain embodiments and certain drawings, but the invention is not limited by these descriptions but only by the claims. Any reference signs in the claims should not be construed as limiting the scope of the invention. The drawings described are only schematic and not restrictive. In the drawings, the size of some of the elements may be exaggerated and not drawn on scale for illustrative purposes. Where the term "comprising" is used in the present description and claims, it does not exclude other elements and steps. Where an indefinite or definite article is used when referring to a singular noun eg "a", "an", "the", this includes a plural of that noun unless something else is specifically stated.

[0040] In addition, the terms first, second, third, etc. in the description and claims are used to distinguish similar elements and not necessarily to describe a sequence order or a time order. It is to be un...

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Abstract

A detection system (100, 150) for qualitative or quantitative detection of a magnetic field property of a modulated magnetic field is described. The modulated magnetic field may e.g. stem from an adjacent electrical current (Iadj) or magnetic particles. The detection system (100, 150) comprises at least one magneto resistive sensor element (102), a current controller (104) for providing a sensing current (Isense) flowing through the magnetic sensor element (102) and a controlling means (108). The controlling means (108) is adapted for deriving at a first frequency f1 a temperature-related parameter of the at least one magneto resistive sensor. The controlling means (108) furthermore is adapted for deriving a qualitative or quantitative characteristic of the adjacent electrical current (Iadj) or magnetic particles, taking into account the derived temperature-related parameter. This second frequency (f1) is different from the first frequency (f1)). The invention also relates to a corresponding method.

Description

technical field [0001] The invention relates to the field of detectors such as chemical detectors or sensors or biosensors. More specifically, the present invention relates to methods and systems for characterizing magnetic fields, such as methods and systems for sensing the presence of, or determining the amount of, magnetic particles and / or current, e.g., when using magnetic Applications of Particles as Labels in Molecular Diagnostics. The present invention also relates to methods and systems for sensing bioactive particles, such as, but not limited to, magnetically labeled bioactive particles using biosensors. Background technique [0002] Currently, magnetoresistive sensors based on eg AMR (Anisotropic Magneto-Resistance), GMR (Giant Magneto-Resistance) or TMR (Tunneling Magneto-Resistance) elements are often used in detection systems. In addition to known high-speed applications such as hard disk heads and MRAM, new relatively low-bandwidth applications have emerged i...

Claims

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Application Information

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IPC IPC(8): G01N15/06G01N33/543G01N35/00G01R33/09G01R33/12
CPCG01R33/12G01R33/093G01R33/1269B82Y25/00G01R33/09G01R33/007
Inventor J·H·尼乌文赫伊斯T·P·H·G·扬森J·维恩J·A·H·M·卡尔曼A·H·J·伊明克
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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