SG44990A1 - Method and apparatus for restoring a thermal response signal of magnetoresistive head - Google Patents

Method and apparatus for restoring a thermal response signal of magnetoresistive head

Info

Publication number
SG44990A1
SG44990A1 SG1996011339A SG1996011339A SG44990A1 SG 44990 A1 SG44990 A1 SG 44990A1 SG 1996011339 A SG1996011339 A SG 1996011339A SG 1996011339 A SG1996011339 A SG 1996011339A SG 44990 A1 SG44990 A1 SG 44990A1
Authority
SG
Singapore
Prior art keywords
restoring
response signal
thermal response
magnetoresistive head
magnetoresistive
Prior art date
Application number
SG1996011339A
Other languages
English (en)
Inventor
Gordon J Smith
Hal Hjalmar Ottesen
Original Assignee
Ibm
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 Ibm filed Critical Ibm
Publication of SG44990A1 publication Critical patent/SG44990A1/en

Links

Classifications

    • 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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/04—Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions
    • 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
    • G11B20/22—Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing distortions
    • 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
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/596—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks
    • G11B5/59683—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks for magnetoresistive heads
    • 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
    • G11B5/012—Recording on, or reproducing or erasing from, magnetic disks

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Digital Magnetic Recording (AREA)
  • Magnetic Heads (AREA)
SG1996011339A 1996-01-02 1996-11-18 Method and apparatus for restoring a thermal response signal of magnetoresistive head SG44990A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/581,906 US5751510A (en) 1996-01-02 1996-01-02 Method and apparatus for restoring a thermal response signal of a magnetoresistive head

Publications (1)

Publication Number Publication Date
SG44990A1 true SG44990A1 (en) 1997-12-19

Family

ID=24327040

Family Applications (1)

Application Number Title Priority Date Filing Date
SG1996011339A SG44990A1 (en) 1996-01-02 1996-11-18 Method and apparatus for restoring a thermal response signal of magnetoresistive head

Country Status (7)

Country Link
US (1) US5751510A (ko)
EP (1) EP0785552B1 (ko)
JP (1) JP3723651B2 (ko)
KR (1) KR100233351B1 (ko)
CN (2) CN1102289C (ko)
DE (1) DE69620141T2 (ko)
SG (1) SG44990A1 (ko)

Families Citing this family (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6088176A (en) * 1993-04-30 2000-07-11 International Business Machines Corporation Method and apparatus for separating magnetic and thermal components from an MR read signal
FR2747822A1 (fr) * 1996-04-17 1997-10-24 Philips Electronics Nv Systeme de lecture d'informations magnetiques muni d'un detecteur d'asperites thermiques
US5986839A (en) * 1996-09-17 1999-11-16 International Business Machines Corporation Electronic magnetoresistive sensor biasing using a transducer equivalent circuit and current sources
US6239936B1 (en) * 1997-08-19 2001-05-29 International Business Machines Corporation Method and apparatus for calibrating a thermal response of a magnetoresistive element
US6049763A (en) * 1997-11-03 2000-04-11 International Business Machines Corporation Method and apparatus for performing digital thermal asperity detection
WO1999052105A1 (en) * 1998-04-06 1999-10-14 Imation Corp. Reverse optical mastering for data storage disks
KR100532379B1 (ko) * 1998-04-17 2006-01-27 삼성전자주식회사 Mr 헤드의 베이스라인 원더링 보상회로 및 베이스라인 원더링 보상방법
US6166890A (en) * 1998-07-24 2000-12-26 Seagate Technology Llc In plane, push-pull parallel force microactuator
US6195219B1 (en) 1998-10-20 2001-02-27 International Business Machines Corporation Method and apparatus for improving a thermal response of a magnetoresistive element
EP1048033A1 (en) * 1998-11-12 2000-11-02 Koninklijke Philips Electronics N.V. Arrangement for reading information from a record carrier
US6445519B1 (en) 1999-04-21 2002-09-03 Seagate Technology Llc Basline instability detector
US6392841B1 (en) 1999-07-16 2002-05-21 International Business Machines Corporation Method and apparatus for restoring a thermal response of a magnetoresistive read transducer
US6417981B1 (en) * 1999-09-23 2002-07-09 International Business Machines Corporation System and method for measuring absolute transducer-medium clearance using a thermal response of an MR transducer
US6446236B1 (en) 1999-10-13 2002-09-03 Maxtor Corporation Reading encoded information subject to random and transient errors
US6388596B1 (en) * 2000-05-08 2002-05-14 Texas Instruments Incorporated Digital signal demodulation using weighted peak sample averaging
DE10196364T1 (de) 2000-06-20 2003-07-03 Seagate Technology Llc Plattenlaufwerk mit Geschichteter Schreibspule
US6414806B1 (en) 2000-10-02 2002-07-02 International Business Machines Corporation Method for thermal asperity detection and compensation in disk drive channels
US6751060B2 (en) 2000-12-05 2004-06-15 Imation Corp. Magnetic media with readable topographical features
US6628598B2 (en) 2000-12-05 2003-09-30 Imation Corp. Patterned media system
US6657809B2 (en) 2001-01-29 2003-12-02 International Business Machines Corporation Method and apparatus for positioning a transducer using a phase difference in surface profile variations on a storage medium
US6762899B2 (en) 2001-03-16 2004-07-13 Hitachi Global Storage Technologies Netherlands B.V. Method and apparatus for estimating the flyheight of an airbearing slider in a storage device using variable spindle velocity
US6785079B2 (en) 2001-03-16 2004-08-31 Hitachi Global Storage Technologies Netherlands B.V. Method and apparatus for estimating the flyheight of an airbearing slider in a storage device
KR100438090B1 (ko) * 2001-05-02 2004-07-02 청주도시가스주식회사 가스 계량기
US6654191B2 (en) * 2001-07-12 2003-11-25 International Business Machines Corporation Restoration of hard disk drive readback signal in the presence of thermal modulation
US6671232B1 (en) * 2001-07-25 2003-12-30 Maxtor Corporation Method and apparatus for measuring the surface temperature of a disk
US7486457B2 (en) * 2002-02-15 2009-02-03 Hitachi Global Storage Technologies Netherlands B.V. Method and apparatus for predicting write failure resulting from flying height modulation
US6883368B2 (en) 2002-04-18 2005-04-26 Hitachi Global Storage Technologies Netherlands B.V. Method and apparatus for characterizing the microwaviness of a disk surface
US6956707B2 (en) * 2002-05-07 2005-10-18 Hitachi Global Storage Technologies Netherlands B.V. Method for look-ahead thermal sensing in a data storage device
US7027263B2 (en) * 2002-05-07 2006-04-11 Hitachi Global Storage Technologies Netherlands B.V. Apparatus for look-ahead thermal sensing in a data storage device
US7038875B2 (en) * 2003-07-31 2006-05-02 Seagate Technology Llc Dynamic measurement of head media spacing modulation
US20050213482A1 (en) * 2004-03-24 2005-09-29 Imation Corp. Multi-track mastering techniques
US20060073422A1 (en) * 2004-09-28 2006-04-06 Imation Corp. Portable conformable deep ultraviolet master mask
US20060110568A1 (en) * 2004-11-23 2006-05-25 Imation Corp. Multi-layers optical data storage disk masters
US7427466B2 (en) * 2004-11-29 2008-09-23 Imation Corp. Anti-reflection optical data storage disk master
US7619841B1 (en) 2005-11-23 2009-11-17 Western Digital Technologies, Inc. Disk drive subtracting low frequency disturbance from a servo burst signal
US7679853B2 (en) * 2005-12-28 2010-03-16 Agere Systems Inc. Detection of signal disturbance in a partial response channel
JP2008047241A (ja) * 2006-08-18 2008-02-28 Tdk Corp 浮上量測定方法及び浮上量の調整が可能な磁気ディスク装置
JP2008159205A (ja) * 2006-12-26 2008-07-10 Fujitsu Ltd 記憶装置、記憶装置用ヘッドの異常検出方法、異常検出プログラム
US8552328B2 (en) * 2007-12-28 2013-10-08 Tdk Corporation Method of repairing the deterioration of magneto-resistive effect device
BR112012000694A8 (pt) * 2009-07-14 2017-09-19 Koninklijke Philips Electronics Nv Dispositivo de detecção de contato para detectar um contato físico entre o dispositivo de detecção de contato e um objeto, método de operação de um dispositivo de detecção de contato para detecção de um contato físico entre o dispositivo de detecção de contato e um objeto e dispositivo de diagnóstico
US8301408B2 (en) * 2010-03-09 2012-10-30 Invensys Systems, Inc. Temperature prediction transmitter
US8045283B2 (en) * 2010-03-23 2011-10-25 Lsi Corporation Amplitude-based approach for detection and classification of hard-disc defect regions
US8089713B2 (en) 2010-03-25 2012-01-03 Lsi Corporation Detection of hard-disc defect regions using soft decisions
US8908317B1 (en) * 2014-01-27 2014-12-09 Kabushiki Kaisha Toshiba Method for detecting touchdown of head and disk storage apparatus
US9947353B1 (en) * 2017-07-26 2018-04-17 Seagate Technology Llc Magnetic recording system employing passive thermal asperity avoidance
US11489501B2 (en) * 2019-10-18 2022-11-01 Skyworks Solutions, Inc. Amplifier distortion detection system

Family Cites Families (51)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3416373A (en) * 1966-04-01 1968-12-17 Ralph J. Havens Displacement detector
NL7309590A (nl) * 1973-07-10 1975-01-14 Philips Nv Inrichting voor het sturen van de positie van een magneetkop ten opzichte van een te volgen informatiespoor.
DE3045401A1 (de) * 1980-12-02 1982-07-01 Robert Bosch Gmbh, 7000 Stuttgart Verfahren zum pruefen von einspritzduesen
US4498146A (en) * 1982-07-30 1985-02-05 At&T Bell Laboratories Management of defects in storage media
US4485337A (en) * 1983-05-09 1984-11-27 Control Data Corporation Servo data driven motor speed control
US4532802A (en) * 1984-05-31 1985-08-06 International Business Machines Corporation Apparatus for analyzing the interface between a recording disk and a read-write head
CA1248222A (en) * 1984-08-27 1989-01-03 Yutaka Souda Magnetic transducer head utilizing magnetoresistance effect
US4647992A (en) * 1984-11-26 1987-03-03 International Business Machines Corporation Combined magnetic channel signal sensor and servo control track following system and method
JPS61177622A (ja) * 1985-01-31 1986-08-09 Matsushita Electric Ind Co Ltd 磁気デイスク装置
US4669011A (en) * 1985-05-03 1987-05-26 Eastman Kodak Company Slider assembly with dynamically positionable transducer
US4712144A (en) * 1985-08-20 1987-12-08 International Business Machines Corporation Method and apparatus for reading recorded data by a magnetoresistive head
JPS6256849A (ja) * 1985-09-06 1987-03-12 Snow Brand Milk Prod Co Ltd 通電加熱法に用いられるセンサ−
EP0227845B1 (en) * 1985-11-19 1990-05-30 International Business Machines Corporation Method and apparatus for controlling the flying height of the head in a magnetic storage unit
JPS62250570A (ja) * 1986-04-22 1987-10-31 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション 記憶装置用変換器
US4747698A (en) * 1986-04-30 1988-05-31 International Business Machines Corp. Scanning thermal profiler
US4777544A (en) * 1986-08-15 1988-10-11 International Business Machine Corporation Method and apparatus for in-situ measurement of head/recording medium clearance
US4802033A (en) * 1986-11-07 1989-01-31 Eastman Kodak Company Predictive positioning offset compensation for high TPI disk systems
JPS63191316A (ja) * 1987-02-03 1988-08-08 Matsushita Electric Ind Co Ltd 磁気記録媒体
JPH0198180A (ja) * 1987-10-09 1989-04-17 Mitsubishi Electric Corp 記憶装置
US4931887A (en) * 1988-02-01 1990-06-05 International Business Machines Corporation Capacitive measurement and control of the fly height of a recording slider
US5084791A (en) * 1988-05-10 1992-01-28 Quantum Corporation Head position control system for fixed drive including position encoder, temperature sensor and embedded fine servo information
US4949036A (en) * 1988-07-07 1990-08-14 Seagate Technology, Inc. Disc drive error mapping using threshold comparison methods
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
US5070495A (en) * 1989-04-12 1991-12-03 International Business Machines Corporation Write calibration for magnetooptic disk recorders
DE69024255T2 (de) * 1989-05-11 1996-05-15 Mitsubishi Electric Corp Defektprüfvorrichtung für scheibenförmigen Datenaufzeichnungsträger
US5054936A (en) * 1989-11-16 1991-10-08 Jacob Fraden Sensor for active thermal detection
US5032935A (en) * 1989-12-12 1991-07-16 International Business Machines Corporation Amplification of signals produced by a magnetoresistive element
US5057785A (en) * 1990-01-23 1991-10-15 International Business Machines Corporation Method and circuitry to suppress additive disturbances in data channels
US5079663A (en) * 1990-01-29 1992-01-07 International Business Machines Corporation Magnetoresistive sensor with track following capability
US5418770A (en) * 1990-06-29 1995-05-23 Hitachi, Ltd. Method of and apparatus for correcting edge interval of pit in optical recording/read-out apparatus
US5130866A (en) * 1990-07-17 1992-07-14 International Business Machines Corporation Method and circuitry for in-situ measurement of transducer/recording medium clearance and transducer magnetic instability
JPH0495218A (ja) * 1990-08-10 1992-03-27 Matsushita Electric Ind Co Ltd 磁気ディスクおよびこれを用いた磁気ディスク装置
US5185681A (en) * 1990-09-28 1993-02-09 Seagate Thermal offset compensation for high density disk drives
JPH04141822A (ja) * 1990-10-02 1992-05-15 Fujitsu Ltd 磁気ディスクおよび磁気ディスク装置
US5168413A (en) * 1990-11-30 1992-12-01 Ibm Corporation Transducer head flying height monitoring methods and apparatus for disk drive system
US5233482A (en) * 1991-07-31 1993-08-03 International Business Machines Corporation Thermal asperity compensation for PRML data detection
JPH05174515A (ja) * 1991-12-20 1993-07-13 Fujitsu Ltd 磁気ヘッドの位置決め方法およびその装置
JP3254743B2 (ja) * 1992-08-17 2002-02-12 ソニー株式会社 位置決め信号の書き込み方法
US5341249A (en) * 1992-08-27 1994-08-23 Quantum Corporation Disk drive using PRML class IV sampling data detection with digital adaptive equalization
US5321559A (en) * 1992-08-27 1994-06-14 Quantum Corporation Asynchronous peak detection of information embedded within PRML class IV sampling data detection channel
US5327298A (en) * 1992-09-10 1994-07-05 International Business Machines Corporation Noise minimization for magnetic data storage drives using oversampling techniques
US5377058A (en) * 1992-12-31 1994-12-27 International Business Machines Corporation Fly height servo control of read/write head suspension
US5301080A (en) * 1992-12-31 1994-04-05 International Business Machines Corporation Bias servo loop for magneto-resistive read/write head
US5424885A (en) * 1993-01-11 1995-06-13 Seagate Technology, Inc. Method for following data tracks in a disc drive using an improved thermal calibration method
US5455730A (en) * 1993-02-18 1995-10-03 International Business Machines Corporation Contact magnetic recording disk file with a magnetoresistive read sensor
JPH06290563A (ja) * 1993-03-31 1994-10-18 Hoya Corp 磁気ヘッド及び磁気記録・再生装置
JP2879185B2 (ja) * 1993-04-16 1999-04-05 ティーディーケイ株式会社 光磁気ディスク
US5367409A (en) * 1993-04-29 1994-11-22 International Business Machines Corporation Even harmonic distortion compensation for digital data detection
US5527110A (en) * 1993-04-30 1996-06-18 International Business Machines Corporation Method and apparatus for detecting asperities on magnetic disks using thermal proximity imaging
US5388014A (en) * 1993-09-10 1995-02-07 Hewlett-Packard Company Apparatus and method of sensing the position of a magnetic head
JP3063022B2 (ja) * 1994-09-12 2000-07-12 ホーヤ株式会社 表面凹凸検出方法及びその装置並びに磁気ディスク検査方法

Also Published As

Publication number Publication date
EP0785552B1 (en) 2002-03-27
US5751510A (en) 1998-05-12
DE69620141T2 (de) 2003-01-02
KR970060049A (ko) 1997-08-12
KR100233351B1 (ko) 2000-01-15
CN1352452A (zh) 2002-06-05
DE69620141D1 (de) 2002-05-02
JP3723651B2 (ja) 2005-12-07
CN1156873A (zh) 1997-08-13
CN1102289C (zh) 2003-02-26
CN1254788C (zh) 2006-05-03
JPH09219002A (ja) 1997-08-19
EP0785552A1 (en) 1997-07-23

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