DE68914744T2 - Verfahren und Schaltung zur Unterdrückung von additiven Fehlern in magnetoresistiven Sensoren enthaltenden Datenkanälen. - Google Patents

Verfahren und Schaltung zur Unterdrückung von additiven Fehlern in magnetoresistiven Sensoren enthaltenden Datenkanälen.

Info

Publication number
DE68914744T2
DE68914744T2 DE68914744T DE68914744T DE68914744T2 DE 68914744 T2 DE68914744 T2 DE 68914744T2 DE 68914744 T DE68914744 T DE 68914744T DE 68914744 T DE68914744 T DE 68914744T DE 68914744 T2 DE68914744 T2 DE 68914744T2
Authority
DE
Germany
Prior art keywords
circuit
data channels
magnetoresistive sensors
channels containing
suppressing additive
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 - Lifetime
Application number
DE68914744T
Other languages
English (en)
Other versions
DE68914744D1 (de
Inventor
Stephen Alan Jove
Klaas Berend Klaasen
Peppen Jacobus Cornelis Le Van
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.)
HGST Netherlands BV
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of DE68914744D1 publication Critical patent/DE68914744D1/de
Application granted granted Critical
Publication of DE68914744T2 publication Critical patent/DE68914744T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G11B5/02—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
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • 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
    • G11B5/012—Recording on, or reproducing or erasing from, magnetic disks
    • 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 
    • 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
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B2005/0002—Special dispositions or recording techniques
    • G11B2005/0005—Arrangements, methods or circuits
    • G11B2005/001—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure
    • G11B2005/0013—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure of transducers, e.g. linearisation, equalisation
    • G11B2005/0016—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure of transducers, e.g. linearisation, equalisation of magnetoresistive transducers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/10—Indicating arrangements; Warning arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Digital Magnetic Recording (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Measuring Magnetic Variables (AREA)
  • Magnetic Heads (AREA)
DE68914744T 1988-08-01 1989-06-23 Verfahren und Schaltung zur Unterdrückung von additiven Fehlern in magnetoresistiven Sensoren enthaltenden Datenkanälen. Expired - Lifetime DE68914744T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/226,634 US4914398A (en) 1988-08-01 1988-08-01 Method and circuitry to suppress additive disturbances in data channels containing MR sensors
SG150894A SG150894G (en) 1988-08-01 1994-10-17 Method and circuitry to suppress additive disturbances in data channels containing MR sensors

Publications (2)

Publication Number Publication Date
DE68914744D1 DE68914744D1 (de) 1994-05-26
DE68914744T2 true DE68914744T2 (de) 1994-11-24

Family

ID=26664436

Family Applications (1)

Application Number Title Priority Date Filing Date
DE68914744T Expired - Lifetime DE68914744T2 (de) 1988-08-01 1989-06-23 Verfahren und Schaltung zur Unterdrückung von additiven Fehlern in magnetoresistiven Sensoren enthaltenden Datenkanälen.

Country Status (7)

Country Link
US (1) US4914398A (de)
EP (1) EP0353852B1 (de)
JP (1) JPH0816964B2 (de)
AU (1) AU617840B2 (de)
CA (1) CA1330832C (de)
DE (1) DE68914744T2 (de)
SG (1) SG150894G (de)

Families Citing this family (65)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS616212A (ja) * 1984-06-20 1986-01-11 Kobe Steel Ltd ベアリング用肌焼鋼の製造方法
US5057785A (en) * 1990-01-23 1991-10-15 International Business Machines Corporation Method and circuitry to suppress additive disturbances in data channels
US5269313A (en) * 1991-09-09 1993-12-14 Sherwood Medical Company Filter and method for filtering baseline wander
JP3109889B2 (ja) * 1992-01-30 2000-11-20 株式会社日立製作所 磁気ヘッド用回路
JP2810592B2 (ja) * 1992-07-06 1998-10-15 シャープ株式会社 ディジタル情報再生装置
US5309294A (en) * 1992-09-08 1994-05-03 Rocky Mountain Magnetics, Inc. Method and circuitry to provide true voltage bias to a magnetoresistive head
US5315185A (en) * 1992-09-30 1994-05-24 Fujitsu Limited Switching noise cancelling system in a space diversity receiving system
US5410264A (en) * 1992-10-13 1995-04-25 Bell Communications Research, Inc. Adaptive impulse noise canceler for digital subscriber lines
US5357150A (en) * 1992-11-06 1994-10-18 International Business Machines Corporation Defect tolerant envelope follower
US5327303A (en) * 1992-12-18 1994-07-05 Seagate Technology, Inc. MR preamplifier having feedback loops for minimizing differential low frequency components and regulating common mode low frequency components of the preamplifier output signal
US5455730A (en) * 1993-02-18 1995-10-03 International Business Machines Corporation Contact magnetic recording disk file with a magnetoresistive read sensor
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
US5810477A (en) * 1993-04-30 1998-09-22 International Business Machines Corporation System for identifying surface conditions of a moving medium
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
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
US5426542A (en) * 1994-01-21 1995-06-20 Seagate Technology, Inc. Electronically coupled high-impedance magnetoresistive preamplifier
JP3109389B2 (ja) * 1994-09-30 2000-11-13 アイコム株式会社 適応フィルタシステム
US5497111A (en) * 1994-12-22 1996-03-05 International Business Machines Corporation Peak detection circuit for suppressing magnetoresistive thermal asperity transients in a data channel
US6034829A (en) * 1995-06-08 2000-03-07 International Business Machines Corporation Disk drive and servo pattern write method for preventing read errors resulting from a thermal asperity within an erase area between a servo pad area and a gray code area
JPH0944810A (ja) * 1995-07-24 1997-02-14 Mitsubishi Electric Corp Ｍｒヘッド用信号再生回路
US5744993A (en) * 1995-09-27 1998-04-28 Lucent Technologies, Inc. Read channel for at least partially offsetting nonlinear signal effects associated with the use of magneto-resistive heads
SG68589A1 (en) * 1995-09-27 1999-11-16 At & T Corp Differential amplifier circuit for use in a read channel for a magnetic recording system
JP3458567B2 (ja) * 1995-11-28 2003-10-20 三菱電機株式会社 Ｍｒヘッド用増幅器
US5872676A (en) * 1996-01-02 1999-02-16 International Business Machines Corporation Method and apparatus for positioning a dual element magnetoresistive head using thermal signals
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
US5739972A (en) * 1996-01-02 1998-04-14 Ibm Method and apparatus for positioning a magnetoresistive head using thermal response to servo information on the record medium
EP0785555A1 (de) * 1996-01-22 1997-07-23 Hewlett-Packard Company Gerät und Verfahren zur Detektion von thermischen Unebenheiten und Prädiktion von Fehlern in Plattenantriebsverfahren
US5818656A (en) * 1996-03-12 1998-10-06 International Business Machines Corporation Circuitry for correction of thermal transients in the analog signal from a magnetoresistive sensor
US6038090A (en) 1996-04-03 2000-03-14 International Business Machines Corporation Method and apparatus for improving baseline recovery of an MR head using a programmable recovery time constant
FR2747822A1 (fr) * 1996-04-17 1997-10-24 Philips Electronics Nv Systeme de lecture d'informations magnetiques muni d'un detecteur d'asperites thermiques
US5914630A (en) * 1996-05-10 1999-06-22 Vtc Inc. MR head preamplifier with output signal amplitude which is independent of head resistance
JP3139964B2 (ja) * 1996-06-24 2001-03-05 株式会社東芝 Ｍｒヘッド用いた磁気ディスク装置及びこの装置におけるサーボ処理方法
US5898532A (en) * 1996-07-02 1999-04-27 Seagate Technology Inc. MR head thermal asperity recovery
SG55343A1 (en) * 1996-07-11 1998-12-21 Texas Instruments Inc Offet free thermal asperity t/a detector
JPH1049806A (ja) * 1996-07-31 1998-02-20 Toshiba Corp 磁気ディスク装置及び同装置のノイズ補償方法
JP2828052B2 (ja) * 1996-08-12 1998-11-25 日本電気株式会社 Ｍｒヘッド用の再生信号波形制御装置
US5753803A (en) * 1996-11-21 1998-05-19 International Business Machines Corporation Apparatus and methods for maintaining a substantially constant temperature in a thermal proximity sensor
US5793240A (en) * 1997-03-06 1998-08-11 Texas Instruments Incorporated Method and circuit for thermal asperity compensation in a data channel
US7019509B2 (en) * 1997-05-30 2006-03-28 The United States Of America As Represented By The Secretary Of The Navy Digital envelope detector
US6462559B1 (en) * 1997-05-30 2002-10-08 The United States Of America As Represented By The Secretary Of The Navy Digital envelope detector
SG65654A1 (en) * 1997-06-02 1999-06-22 Motorola Inc Circuit for tracking rapid changes in mid-point voltage of a data signal
US6239936B1 (en) 1997-08-19 2001-05-29 International Business Machines Corporation Method and apparatus for calibrating a thermal response of a magnetoresistive element
JP3545579B2 (ja) * 1997-09-30 2004-07-21 株式会社日立製作所 再生信号処理方法および再生信号処理回路ならびに磁気記憶装置
US6038091A (en) * 1997-10-06 2000-03-14 Cirrus Logic, Inc. Magnetic disk drive read channel with digital thermal asperity detector
US6256157B1 (en) * 1998-05-15 2001-07-03 International Business Machines Corporation Method and apparatus for removing noise spikes
EP0989559A1 (de) * 1998-09-23 2000-03-29 Deutsche Thomson-Brandt Gmbh Störungserkennung in einem Datensignal
US6256161B1 (en) * 1999-05-20 2001-07-03 Agere Systems Guardian Corp. Echo cancellation for disk drive read circuit
US6529566B1 (en) * 1999-08-31 2003-03-04 Motorola, Inc. Method and apparatus for facilitating a classification of a baseband signal
US6404578B1 (en) * 1999-09-28 2002-06-11 Koninklijke Philips Electronics N.V. Circuit for reduction and optimization of write-to-read settling times in magnetic medium storage devices
FR2806855B1 (fr) * 2000-03-21 2002-06-21 St Microelectronics Sa Demodulateur d'un signal alternatif module en amplitude
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
AU2002323295A1 (en) * 2002-03-29 2003-10-20 Seagate Technology Llc Mr head thermal asperity cancellation
US7593494B1 (en) 2004-09-23 2009-09-22 Adtran, Inc. System and method for canceling impulse noise
US7809076B1 (en) * 2005-03-11 2010-10-05 Adtran, Inc. Adaptive interference canceling system and method
US7804657B1 (en) 2007-06-11 2010-09-28 Western Digital Technologies, Inc. Setting an operating bias current for a magnetoresistive head using ratio of target voltage and measured voltage
US7872824B1 (en) 2007-06-11 2011-01-18 Western Digital (Fremont), Llc Setting an operating bias current for a magnetoresistive head by computing a target operating voltage
US7760458B1 (en) 2008-08-12 2010-07-20 Western Digital Technologies, Inc. Disk drive adjusting head bias during servo synchronization to compensate for over/under sensitivity
US9202498B2 (en) 2013-03-15 2015-12-01 Seagate Technology Llc Resistance temperature sensors powered using reader bond pad sharing
US9899047B2 (en) 2013-10-10 2018-02-20 Seagate Technology Llc Bond pad sharing for powering a multiplicity of electrical components
US9607640B2 (en) 2015-07-29 2017-03-28 Seagate Technology Llc Bond pad sharing for powering a multiplicity of electrical components of a recording head
US9812158B1 (en) 2015-12-16 2017-11-07 Seagate Technology Llc Bond pad sharing for powering a multiplicity of electrical components of a recording head
US9905255B1 (en) 2016-02-01 2018-02-27 Seagate Technology Llc Bond pad sharing for powering multiple heaters of a magnetic recording head
US9905254B1 (en) 2016-02-09 2018-02-27 Seagate Technology Llc Bond pad sharing for powering multiple components of a recording head
US9934807B2 (en) 2016-06-29 2018-04-03 Seagate Technology Llc Bond pad sharing for powering multiple writers of a recording head
US9972350B1 (en) 2016-10-31 2018-05-15 Seagate Technology Llc Bolometer and contact sensor arrangement for a heat-assisted magnetic recording device

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3473131A (en) * 1965-06-04 1969-10-14 Radiation Inc Level shift correction circuits
US3903485A (en) * 1968-01-10 1975-09-02 Ray Milton Dolby Compressors, expanders and noise reduction systems
US3566281A (en) * 1968-05-21 1971-02-23 Ibm Electric pulse wave clipping circuitry
US3588705A (en) * 1969-11-12 1971-06-28 Nasa Frequency-modulation demodulator threshold extension device
US4163909A (en) * 1977-08-23 1979-08-07 International Business Machines Corporation Peak detecting circuitry and dual threshold circuitry therefor
US4141494A (en) * 1977-02-25 1979-02-27 Fisher Alan J Digital code reader
DE2905904A1 (de) * 1979-02-16 1980-08-28 Licentia Gmbh Schaltungsanordnung zur grundlinienregeneration eines pcm-signals
US4356389A (en) * 1980-06-27 1982-10-26 Motorola Inc. Bar code scanner interface
US4433256A (en) * 1982-07-06 1984-02-21 Motorola, Inc. Limiter with dynamic hysteresis
JPS59186110A (ja) * 1983-04-08 1984-10-22 Toshiba Corp デジタルデ−タ生成装置
IT1178599B (it) * 1984-10-31 1987-09-09 Gte Communication Syst Predistorcitore a tre vie a fondamentale soppressa
US4739518A (en) * 1986-05-22 1988-04-19 Motorola, Inc. Receiver interference suppression system
SE452213B (sv) * 1986-10-29 1987-11-16 Jiri Klokocka Anordning for eliminering av brus och/eller brum i en signal
JPH055725Y2 (de) * 1987-02-06 1993-02-15

Also Published As

Publication number Publication date
SG150894G (en) 1995-03-17
JPH0816964B2 (ja) 1996-02-21
JPH0254403A (ja) 1990-02-23
AU617840B2 (en) 1991-12-05
CA1330832C (en) 1994-07-19
DE68914744D1 (de) 1994-05-26
AU3915889A (en) 1990-02-08
US4914398A (en) 1990-04-03
EP0353852B1 (de) 1994-04-20
EP0353852A3 (de) 1991-07-31
EP0353852A2 (de) 1990-02-07

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: HITACHI GLOBAL STORAGE TECHNOLOGIES NETHERLANDS B.