WO2008040659A3 - Method for operating a magnetic field sensor and associated magnetic field sensor - Google Patents

Method for operating a magnetic field sensor and associated magnetic field sensor Download PDF

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Publication number
WO2008040659A3
WO2008040659A3 PCT/EP2007/060160 EP2007060160W WO2008040659A3 WO 2008040659 A3 WO2008040659 A3 WO 2008040659A3 EP 2007060160 W EP2007060160 W EP 2007060160W WO 2008040659 A3 WO2008040659 A3 WO 2008040659A3
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic field
field sensor
elements
operating
magnetoresistive
Prior art date
Application number
PCT/EP2007/060160
Other languages
German (de)
French (fr)
Other versions
WO2008040659A2 (en
Inventor
Gotthard Rieger
Richard Schmidt
Roland Weiss
Original Assignee
Siemens Ag
Gotthard Rieger
Richard Schmidt
Roland Weiss
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Ag, Gotthard Rieger, Richard Schmidt, Roland Weiss filed Critical Siemens Ag
Publication of WO2008040659A2 publication Critical patent/WO2008040659A2/en
Publication of WO2008040659A3 publication Critical patent/WO2008040659A3/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
    • G01R33/09—Magnetoresistive devices
    • G01R33/093—Magnetoresistive devices using multilayer structures, e.g. giant magnetoresistance sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y25/00—Nanomagnetism, e.g. magnetoimpedance, anisotropic magnetoresistance, giant magnetoresistance or tunneling magnetoresistance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/20—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices
    • G01R15/205—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices using magneto-resistance devices, e.g. field plates

Abstract

Magnetic field sensors made of magnetoresistive elements are known, wherein four such elements are used in a bridge circuit. As is known, such magnetoresistive elements, in which a measuring current can be detected as the magnetic field signal, have a characteristic curve affected by hysteresis. In order to reduce or minimize hysteresis, at least one high frequency end magnetization pulse is superimposed on the measuring current, thus significantly improving the measuring properties. For this purpose, a conductor loop (45), preferably with magnetoresistive sensor elements (41m -44) switched in a bridge circuit, is connected into the sensor (40).
PCT/EP2007/060160 2006-09-29 2007-09-25 Method for operating a magnetic field sensor and associated magnetic field sensor WO2008040659A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610046739 DE102006046739B4 (en) 2006-09-29 2006-09-29 Method for operating a magnetic field sensor and associated magnetic field sensor
DE102006046739.6 2006-09-29

Publications (2)

Publication Number Publication Date
WO2008040659A2 WO2008040659A2 (en) 2008-04-10
WO2008040659A3 true WO2008040659A3 (en) 2008-07-10

Family

ID=39134441

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/060160 WO2008040659A2 (en) 2006-09-29 2007-09-25 Method for operating a magnetic field sensor and associated magnetic field sensor

Country Status (2)

Country Link
DE (1) DE102006046739B4 (en)
WO (1) WO2008040659A2 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7768083B2 (en) 2006-01-20 2010-08-03 Allegro Microsystems, Inc. Arrangements for an integrated sensor
DE102007052408A1 (en) 2007-10-31 2009-05-07 Siemens Ag Magnetic field sensor i.e. giant magnetic resistance sensor, operating method for measuring e.g. current, involves using front reversal point on characteristics curve as new starting point for forming changeable hysteresis loop
US7816905B2 (en) 2008-06-02 2010-10-19 Allegro Microsystems, Inc. Arrangements for a current sensing circuit and integrated current sensor
US7973527B2 (en) 2008-07-31 2011-07-05 Allegro Microsystems, Inc. Electronic circuit configured to reset a magnetoresistance element
US8063634B2 (en) 2008-07-31 2011-11-22 Allegro Microsystems, Inc. Electronic circuit and method for resetting a magnetoresistance element
US9354284B2 (en) 2014-05-07 2016-05-31 Allegro Microsystems, Llc Magnetic field sensor configured to measure a magnetic field in a closed loop manner
US9322887B1 (en) 2014-12-01 2016-04-26 Allegro Microsystems, Llc Magnetic field sensor with magnetoresistance elements and conductive-trace magnetic source
US10935612B2 (en) 2018-08-20 2021-03-02 Allegro Microsystems, Llc Current sensor having multiple sensitivity ranges
US11567108B2 (en) 2021-03-31 2023-01-31 Allegro Microsystems, Llc Multi-gain channels for multi-range sensor

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2944490C2 (en) * 1979-11-03 1985-02-21 Siemens AG, 1000 Berlin und 8000 München Process for eliminating the influence of remanence in receiving systems and device for carrying out the process
US5351005A (en) * 1992-12-31 1994-09-27 Honeywell Inc. Resetting closed-loop magnetoresistive magnetic sensor
DE4319146C2 (en) * 1993-06-09 1999-02-04 Inst Mikrostrukturtechnologie Magnetic field sensor, made up of a magnetic reversal line and one or more magnetoresistive resistors
DE19834153A1 (en) * 1998-07-29 2000-02-10 Lust Antriebstechnik Gmbh Process for evaluating signals from magnetoresistive sensors
US7112793B2 (en) * 2004-01-05 2006-09-26 Laser Technology, Inc. One-chip compass implemented using magnetoresistive (MR) sensor temperature compensation and magnetic cross-term reduction techniques
DE102004056384A1 (en) * 2004-07-01 2006-02-02 Sensitec Gmbh Offset elimination method for magnetoresistive sensor, involves separating signal components by high pass filter provided in direct path of signal, and sending signal of differential amplifier to filter

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
HAUSER H: "Magnetic hysteresis modeling of electronic sensor devices and components", SENSORS AND ACTUATORS A, ELSEVIER SEQUOIA S.A., LAUSANNE, CH, vol. 106, no. 1-3, 15 September 2003 (2003-09-15), pages 84 - 90, XP004446528, ISSN: 0924-4247 *
MAPPS D J ET AL: "Optimisation of material and structure for a switched-bias magnetoresistive sensor", SENSORS AND ACTUATORS A, ELSEVIER SEQUOIA S.A., LAUSANNE, CH, vol. 81, no. 1-3, April 2000 (2000-04-01), pages 60 - 63, XP004191252, ISSN: 0924-4247 *
TAKAHASHI ET AL: "Study on demagnetization characteristics of magnetic shielding plate in cathode ray tube", JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, ELSEVIER, AMSTERDAM, NL, vol. 181, no. 1-3, 1 January 2007 (2007-01-01), pages 121 - 125, XP005670188, ISSN: 0924-0136 *

Also Published As

Publication number Publication date
DE102006046739B4 (en) 2008-08-14
WO2008040659A2 (en) 2008-04-10
DE102006046739A1 (en) 2008-04-03

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