ES470479A1 - Dispositivo de deteccion de campo magnetico - Google Patents

Dispositivo de deteccion de campo magnetico

Info

Publication number
ES470479A1
ES470479A1 ES470479A ES470479A ES470479A1 ES 470479 A1 ES470479 A1 ES 470479A1 ES 470479 A ES470479 A ES 470479A ES 470479 A ES470479 A ES 470479A ES 470479 A1 ES470479 A1 ES 470479A1
Authority
ES
Spain
Prior art keywords
fields
fringing
elements
code
phase
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
ES470479A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
INTERNATIONALE POUR L'INFORMATIQUE CII-H Cie
Original Assignee
INTERNATIONALE POUR L'INFORMATIQUE CII-H Cie
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 INTERNATIONALE POUR L'INFORMATIQUE CII-H Cie filed Critical INTERNATIONALE POUR L'INFORMATIQUE CII-H Cie
Publication of ES470479A1 publication Critical patent/ES470479A1/es
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C19/00—Digital stores in which the information is moved stepwise, e.g. shift registers
    • G11C19/02—Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements
    • G11C19/08—Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements using thin films in plane structure
    • G11C19/0866—Detecting magnetic domains
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/08—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes
    • G06K7/082—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors
    • G06K7/087—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors flux-sensitive, e.g. magnetic, detectors

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Theoretical Computer Science (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Measuring Magnetic Variables (AREA)
  • Magnetic Heads (AREA)

Abstract

Dispositivo de detección de campo magnético que comprende al menos un elemento magneto-resistente colocado en este campo caracterizado porque el elemento magneto-resistente está asociado con un elemento conductor eléctrico aislado de él y recorrido por una corriente de excitación alternativamente positiva y negativa, con el fin de detectar la presencia del campo en el que está colocado comparando la fase de dicha corriente de excitación y la fase de la corriente suministrada por el elemento magneto-resistente en respuesta a la acción sobre el mismo de dicho campo y del campo magnético producido por la corriente de excitación.
ES470479A 1977-06-02 1978-06-02 Dispositivo de deteccion de campo magnetico Expired ES470479A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7716820A FR2393318A1 (fr) 1977-06-02 1977-06-02 Dispositif de detection de champ magnetique

Publications (1)

Publication Number Publication Date
ES470479A1 true ES470479A1 (es) 1979-09-01

Family

ID=9191559

Family Applications (1)

Application Number Title Priority Date Filing Date
ES470479A Expired ES470479A1 (es) 1977-06-02 1978-06-02 Dispositivo de deteccion de campo magnetico

Country Status (9)

Country Link
US (1) US4197987A (es)
JP (1) JPS542626A (es)
BR (1) BR7803563A (es)
DE (1) DE2824259A1 (es)
ES (1) ES470479A1 (es)
FR (1) FR2393318A1 (es)
GB (1) GB1604087A (es)
IT (1) IT1202748B (es)
NL (1) NL7805967A (es)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4354100A (en) * 1980-10-06 1982-10-12 International Business Machines Corporation Scannable readout device
FR2508203A1 (fr) * 1981-06-19 1982-12-24 Cii Honeywell Bull Dispositif de transduction magnetoresistant de lecture d'informations codees a faible densite
ES520422A0 (es) * 1983-03-08 1984-03-16 Zottnik Edmund Sistema codificado de validacion y comando.
JPS61130769A (ja) * 1984-11-30 1986-06-18 株式会社日立製作所 低温廃ガスを利用した寒冷発生方法
DE3888659T2 (de) * 1987-12-25 1994-07-07 Sharp Kk Supraleitendes Magnetwiderstandsgerät.
US4988850A (en) * 1988-05-25 1991-01-29 Murata Mfg. Co., Ltd. Magnetoresistance element array
FR2656454B1 (fr) * 1989-12-22 1995-07-21 Thomson Csf Tete de lecture multipiste.
FR2694431B1 (fr) * 1992-07-29 1994-09-09 Kiota Int Appareil de lecture d'une étiquette magnétique.
DE69412660D1 (de) * 1993-02-17 1998-10-01 Ibm Magnetoresistiver Lesewandler
US6579728B2 (en) 1998-08-03 2003-06-17 Privicom, Inc. Fabrication of a high resolution, low profile credit card reader and card reader for transmission of data by sound
US6129277A (en) * 1998-08-03 2000-10-10 Privicon, Inc. Card reader for transmission of data by sound
GB0423676D0 (en) * 2004-10-25 2004-11-24 Arjo Wiggins Ltd Method for reading magnetic data
CN101802633A (zh) * 2007-09-21 2010-08-11 Nxp股份有限公司 磁电阻传感器装置及其信号处理方法
US20090152356A1 (en) * 2007-12-14 2009-06-18 Honeywell International Inc. Non-contact magnetic pattern recognition sensor
US10354679B2 (en) 2016-12-13 2019-07-16 International Business Machines Corporation Magnetic recording module having tunnel valve sensors with dissimilar tunnel barrier resistivities
US10014014B1 (en) 2017-06-14 2018-07-03 International Business Machines Corporation Magnetic recording apparatus having circuits with differing tunnel valve sensors and about the same resistance
US10830613B2 (en) 2018-03-26 2020-11-10 Analog Devices Global Unlimited Company Turn count decoding for multi-turn sensors

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2780774A (en) * 1953-03-18 1957-02-05 Burroughs Corp Magnetostrictive device
US3151316A (en) * 1959-10-30 1964-09-29 Bell Telephone Labor Inc Magnetic data storage system
FR1392375A (fr) * 1964-05-08 1965-03-12 Siemens Ag Appareil de mesure de champ magnétique, comportant une résistance variant en fonction de ce champ
US3526899A (en) * 1967-01-09 1970-09-01 Ibm Magneto-acoustic transducer for high track density recording
US3573127A (en) * 1967-07-28 1971-03-30 Sperry Rand Corp Stress sensitivity reduction of magnetostrictive film elements
US3634657A (en) * 1969-07-16 1972-01-11 Rusco Ind Inc Electronic reader means for magnetic credit cards and the like
US3887944A (en) * 1973-06-29 1975-06-03 Ibm Method for eliminating part of magnetic crosstalk in magnetoresistive sensors

Also Published As

Publication number Publication date
FR2393318B1 (es) 1980-02-15
NL7805967A (nl) 1978-12-05
GB1604087A (en) 1981-12-02
US4197987A (en) 1980-04-15
DE2824259A1 (de) 1978-12-21
FR2393318A1 (fr) 1978-12-29
BR7803563A (pt) 1979-03-13
IT1202748B (it) 1989-02-09
IT7824128A0 (it) 1978-06-02
JPS542626A (en) 1979-01-10

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19990405