DE69723146D1 - System zum Lesen von magnetischen Informationen mit Detektor für thermische Unebenheiten - Google Patents

System zum Lesen von magnetischen Informationen mit Detektor für thermische Unebenheiten

Info

Publication number
DE69723146D1
DE69723146D1 DE69723146T DE69723146T DE69723146D1 DE 69723146 D1 DE69723146 D1 DE 69723146D1 DE 69723146 T DE69723146 T DE 69723146T DE 69723146 T DE69723146 T DE 69723146T DE 69723146 D1 DE69723146 D1 DE 69723146D1
Authority
DE
Germany
Prior art keywords
detector
thermal disturbance
information reading
reading system
magnetic information
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 - Fee Related
Application number
DE69723146T
Other languages
English (en)
Other versions
DE69723146T2 (de
Inventor
Eric Desbonnets
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
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 Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Application granted granted Critical
Publication of DE69723146D1 publication Critical patent/DE69723146D1/de
Publication of DE69723146T2 publication Critical patent/DE69723146T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
    • G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
    • G11B5/3903—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects using magnetic thin film layers or their effects, the films being part of integrated structures
    • G11B5/3906—Details related to the use of magnetic thin film layers or to their effects
    • G11B5/3945—Heads comprising more than one sensitive element
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10037—A/D conversion, D/A conversion, sampling, slicing and digital quantisation or adjusting parameters thereof
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
    • G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
    • G11B5/3903—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects using magnetic thin film layers or their effects, the films being part of integrated structures
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/40—Protective measures on heads, e.g. against excessive temperature 

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Signal Processing (AREA)
  • Magnetic Heads (AREA)
  • Digital Magnetic Recording (AREA)
  • Measuring Magnetic Variables (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Geophysics And Detection Of Objects (AREA)
DE69723146T 1996-04-17 1997-04-07 System zum Lesen von magnetischen Informationen mit Detektor für thermische Unebenheiten Expired - Fee Related DE69723146T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9604801 1996-04-17
FR9604801A FR2747822A1 (fr) 1996-04-17 1996-04-17 Systeme de lecture d'informations magnetiques muni d'un detecteur d'asperites thermiques

Publications (2)

Publication Number Publication Date
DE69723146D1 true DE69723146D1 (de) 2003-08-07
DE69723146T2 DE69723146T2 (de) 2004-05-27

Family

ID=9491291

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69723146T Expired - Fee Related DE69723146T2 (de) 1996-04-17 1997-04-07 System zum Lesen von magnetischen Informationen mit Detektor für thermische Unebenheiten

Country Status (9)

Country Link
US (1) US5956197A (de)
EP (1) EP0802525B1 (de)
JP (1) JP3866364B2 (de)
KR (1) KR100560317B1 (de)
CN (1) CN1100321C (de)
AT (1) ATE244439T1 (de)
DE (1) DE69723146T2 (de)
FR (1) FR2747822A1 (de)
MY (1) MY119322A (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SG55343A1 (en) * 1996-07-11 1998-12-21 Texas Instruments Inc Offet free thermal asperity t/a detector
US6122131A (en) * 1997-09-12 2000-09-19 Quantum Corporation Adaptively-controlled disk drive assembly
US6069761A (en) * 1998-03-30 2000-05-30 Quantum Corporation Apparatus, and associated method, for protecting a magnetoresistive sensor from damage during a thermal asperity event
US6494085B2 (en) * 1998-09-14 2002-12-17 Seagate Technology Llc Method and system for detecting thermal asperity on discs used in a disc drive
AU2002323295A1 (en) 2002-03-29 2003-10-20 Seagate Technology Llc Mr head thermal asperity cancellation
US7569170B2 (en) 2005-03-04 2009-08-04 E.I. Du Pont De Nemours And Company Compositions comprising a fluoroolefin
WO2012014376A1 (ja) * 2010-07-30 2012-02-02 パナソニック株式会社 磁界検知マイコンおよび磁界検知方法
FR2974418B1 (fr) * 2011-04-20 2013-05-31 Commissariat Energie Atomique Detecteur d'oscillations
CN114184856A (zh) * 2021-12-06 2022-03-15 中国计量科学研究院 一种基于全差分结构的热噪声检测装置及噪声温度计

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61284819A (ja) * 1985-06-12 1986-12-15 Hitachi Ltd 磁気抵抗効果型再生ヘツド
US4914398A (en) * 1988-08-01 1990-04-03 International Business Machines Corporation Method and circuitry to suppress additive disturbances in data channels containing MR sensors
CN1015030B (zh) * 1988-08-01 1991-12-04 国际商业机器公司 抑制数据通道加性干扰的方法和电路
US5057785A (en) * 1990-01-23 1991-10-15 International Business Machines Corporation Method and circuitry to suppress additive disturbances in data channels
US5216561A (en) * 1991-08-29 1993-06-01 Eastman Kodak Company Apparatus and method of manipulating sum, absolute difference and difference signals for suppressing medium-induced playback error in a magnetoresistive head assembly
JP3147508B2 (ja) * 1992-07-17 2001-03-19 松下電器産業株式会社 速度検出装置
US5351003A (en) * 1993-04-02 1994-09-27 General Motors Corporation Temperature compensated magnetoresistive position sensor
JP3175415B2 (ja) * 1993-08-09 2001-06-11 株式会社日立製作所 磁気記録再生装置
JPH0773417A (ja) * 1993-09-01 1995-03-17 Hitachi Ltd 磁気抵抗効果型磁気ヘッド及び磁気ディスク装置
US5420736A (en) * 1994-04-15 1995-05-30 International Business Machines Corporation MR read transducer with thermal noise cancellation
US5751510A (en) * 1996-01-02 1998-05-12 International Business Machines Corporation Method and apparatus for restoring a thermal response signal of a magnetoresistive head

Also Published As

Publication number Publication date
DE69723146T2 (de) 2004-05-27
EP0802525B1 (de) 2003-07-02
KR970071722A (ko) 1997-11-07
CN1100321C (zh) 2003-01-29
MY119322A (en) 2005-05-31
JP3866364B2 (ja) 2007-01-10
US5956197A (en) 1999-09-21
ATE244439T1 (de) 2003-07-15
KR100560317B1 (ko) 2006-06-15
EP0802525A1 (de) 1997-10-22
FR2747822A1 (fr) 1997-10-24
CN1166031A (zh) 1997-11-26
JPH1064003A (ja) 1998-03-06

Similar Documents

Publication Publication Date Title
EP0030256B1 (de) Aufzeichnungssysteme mit Servosignalen auf einer unterliegenden Spur
ATE175802T1 (de) Servosteuerungssystem
DE69723146D1 (de) System zum Lesen von magnetischen Informationen mit Detektor für thermische Unebenheiten
BR8500630A (pt) Estrutura de cabecote de leitura-gravacao vertical de trilha geminada e metodo de polarizacao de vetores acoplados
DE69231529D1 (de) Magnetische Aufzeichnungsträger mit Gleitmitteln basierend auf Perfluorpolyetherderivaten
DE69528349T2 (de) Verbesserter magnetoresistiver Lese-/Schreibkopf (MR)
JPS6243801A (ja) 磁気記録検出回路
DE69230123T2 (de) Aufzeichnungsmedium und Informationslesevorrichtung
US4164781A (en) Track servoing system using signals from tunnel erase heads
CA1295418C (en) Combined magnetic channel signal sensor and servo control track following system and method
ATE162328T1 (de) Aufzeichnungsvorrichtung mit temperaturabhängiger schreibstromsteuerung
US4207601A (en) Transient temperature compensation for moving head disk drive
DE69230088T2 (de) Lese/Schreibsystem für Aufzeichnungsmedium und kontaktfreies IC-Karten-System
GB1511905A (en) Magnetic transducer heads
US5701213A (en) Symmetrical resistive transducer biasing circuit and method
EP0720285A2 (de) Differenzverstärker mit Pseudolast zur Kontrolle des Ausgangsgleichtaktbereiches
US5917680A (en) Magnetoresistive head with magnetic bias level control
US4792868A (en) Recording/reproducing device with means for switching inductance of such device for use in a floppy disk apparatus
US5986842A (en) Magnetic disk apparatus with circuit capable of identifying individual specification
KR920015263A (ko) 기록재생장치 및 기록매체
US6449113B1 (en) Device for reading magnetic information
GB2343055A (en) Reader for a low-flying magnetoresistive sensor
JPS6125057Y2 (de)
JPS6125054Y2 (de)
JP2518906B2 (ja) 磁気記録再生装置

Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee