Magneto-resistive sensor for measuring a magnetic field based on an anisotropic magneto-resistive (AMR) effect or a gigantic magneto-resistive (GMR) effect

US8207732B2 · kind B2 · utility

Assignee

• MEAS Deutschland GmbH · DE

Inventors

• Axel Bartos · Waltrop, DE
• Armin Meisenberg · Dortmund, DE
• Fritz Dettmann · Solms, DE

Key dates

• Filing date: Sep 13, 2004
• Grant date: Jun 26, 2012
• Expiry date: Sep 29, 2027

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/09
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Magnetoresistive sensors based on the AMR or GMR effect exhibit substantially enlarged linear characteristic curve regions as a result of the fact that their resistances are composed of magnetoresistive layer strips of differing anisotropic forms. Differing anisotropic forms can be achieved by different strip widths, strip thicknesses, strip intervals or strip materials. The temperature compensation for the output voltage of the magnetoresistive sensors, at least at one point on the characteristic curve, is achieved by the series connection of an additional layer strip with a temperature coefficient that differs from that of the magnetoresistive material to at least one magnetoresistive resistance of the sensor.