DE10084503T1 - Verfahren und Vorrichtung zum Korrigieren von asymmetrischen digitalen Lesesignalen - Google Patents

Verfahren und Vorrichtung zum Korrigieren von asymmetrischen digitalen Lesesignalen

Info

Publication number
DE10084503T1
DE10084503T1 DE10084503T DE10084503T DE10084503T1 DE 10084503 T1 DE10084503 T1 DE 10084503T1 DE 10084503 T DE10084503 T DE 10084503T DE 10084503 T DE10084503 T DE 10084503T DE 10084503 T1 DE10084503 T1 DE 10084503T1
Authority
DE
Germany
Prior art keywords
read signals
digital read
asymmetrical digital
correcting
correcting asymmetrical
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.)
Withdrawn
Application number
DE10084503T
Other languages
English (en)
Inventor
Nan Ling Goh
Ban Hok Goh
Utt Heng Kan
Kah Liang Gan
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.)
Seagate Technology LLC
Original Assignee
Seagate Technology LLC
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 Seagate Technology LLC filed Critical Seagate Technology LLC
Publication of DE10084503T1 publication Critical patent/DE10084503T1/de
Withdrawn legal-status Critical Current

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
    • G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
    • 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
    • G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
    • G11B20/10055—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter using partial response filtering when writing the signal to the medium or reading it therefrom
    • 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
    • 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
    • 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
    • G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
    • G11B20/10203—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter baseline correction
    • 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
    • G11B20/10268—Improvement or modification of read or write signals bit detection or demodulation methods
    • G11B20/10287—Improvement or modification of read or write signals bit detection or demodulation methods using probabilistic methods, e.g. maximum likelihood detectors
    • G11B20/10296—Improvement or modification of read or write signals bit detection or demodulation methods using probabilistic methods, e.g. maximum likelihood detectors using the Viterbi algorithm
    • 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
    • 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
    • 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
    • G11B2005/0018—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 by current biasing control or regulation
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2508—Magnetic discs
    • 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
    • G11B5/09—Digital recording

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Probability & Statistics with Applications (AREA)
  • Digital Magnetic Recording (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Dc Digital Transmission (AREA)
DE10084503T 1999-04-21 2000-04-20 Verfahren und Vorrichtung zum Korrigieren von asymmetrischen digitalen Lesesignalen Withdrawn DE10084503T1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13031299P 1999-04-21 1999-04-21
PCT/US2000/010584 WO2000063906A1 (en) 1999-04-21 2000-04-20 Method and apparatus for correcting digital asymmetric read signals

Publications (1)

Publication Number Publication Date
DE10084503T1 true DE10084503T1 (de) 2002-09-26

Family

ID=22444098

Family Applications (1)

Application Number Title Priority Date Filing Date
DE10084503T Withdrawn DE10084503T1 (de) 1999-04-21 2000-04-20 Verfahren und Vorrichtung zum Korrigieren von asymmetrischen digitalen Lesesignalen

Country Status (7)

Country Link
US (1) US6519106B1 (de)
JP (1) JP2003517695A (de)
KR (1) KR100472523B1 (de)
CN (1) CN1348591A (de)
DE (1) DE10084503T1 (de)
GB (1) GB2363667B (de)
WO (1) WO2000063906A1 (de)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6903889B2 (en) * 2003-06-11 2005-06-07 Seagate Technology Method and apparatus for tuning a magnetoresistive bias parameter in a data storage system
US7161752B1 (en) * 2003-11-05 2007-01-09 Marvell International Ltd. Asymmetric compensation circuit
US7298570B1 (en) 2004-10-27 2007-11-20 Marvell International Ltd. Asymmetry correction in read signal
US7511910B1 (en) * 2004-10-27 2009-03-31 Marvell International Ltd. Asymmetry correction in read signal
US8117248B2 (en) * 2005-02-28 2012-02-14 Hitachi Global Storage Technologies Netherlands B.V. Digital filter instruction and filter implementing the filter instruction
US7495854B2 (en) * 2005-10-03 2009-02-24 International Business Machines Corporation Dynamic method for asymmetry compensation in a storage read channel
TWI309410B (en) * 2005-11-30 2009-05-01 Realtek Semiconductor Corp A decoding apparatus and method utilized in an optical disc drive
US7848042B1 (en) * 2007-02-15 2010-12-07 Link—A—Media Devices Corporation Decoupling magneto-resistive asymmetry and offset loops
US7894151B2 (en) * 2008-02-15 2011-02-22 Broadcom Corporation “Flat analog” AFE coupled with an all digital architecture compensation read channel
US8971387B2 (en) * 2009-10-09 2015-03-03 Intersil Americas LLC System and method for providing a full fail-safe capability in signal transmission networks
US8904070B2 (en) * 2012-01-31 2014-12-02 Lsi Corporation Systems and methods for digital MRA compensation
US8947801B1 (en) 2013-10-08 2015-02-03 Seagate Technology Llc Multi-track asymmetric read-back signal correction
US9099158B1 (en) 2013-10-08 2015-08-04 Seagate Technology Llc Multi-track signal dipulse extraction

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4945538A (en) 1988-11-14 1990-07-31 International Business Machines Corporation Method and apparatus for processing sample values in a coded signal processing channel
US5418660A (en) 1991-12-09 1995-05-23 Hitachi, Ltd. Information processing apparatus for processing reproduction signal having nonlinear characteristics
JP3380282B2 (ja) * 1992-11-06 2003-02-24 パイオニア株式会社 ディジタル信号再生装置及び再生方法
US6151177A (en) * 1994-12-09 2000-11-21 Seagate Technology, Inc. Apparatus for compensating for non-linear characteristics of magnetoresistive heads
JPH08255303A (ja) * 1995-03-20 1996-10-01 Fujitsu Ltd アナログ信号の波形整形回路
US5943177A (en) 1995-05-26 1999-08-24 Maxtor Corporation MR head read signal preconditioning circuitry for reducing pulse -to-pulse baseline distortion
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
JP3648308B2 (ja) * 1995-11-30 2005-05-18 株式会社日立グローバルストレージテクノロジーズ 等化器および磁気記録信号再生装置
JPH10143805A (ja) * 1996-11-14 1998-05-29 Hitachi Ltd 補正回路、等化器及びこれを用いた磁気記録再生装置

Also Published As

Publication number Publication date
WO2000063906A1 (en) 2000-10-26
KR20020007378A (ko) 2002-01-26
KR100472523B1 (ko) 2005-03-08
CN1348591A (zh) 2002-05-08
WO2000063906B1 (en) 2001-02-22
JP2003517695A (ja) 2003-05-27
GB2363667A (en) 2002-01-02
GB0123526D0 (en) 2001-11-21
GB2363667B (en) 2003-06-18
US6519106B1 (en) 2003-02-11

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
8139 Disposal/non-payment of the annual fee
8170 Reinstatement of the former position
8139 Disposal/non-payment of the annual fee