DE69617630T2 - Verbesserter fehlertoleranter sync-marken-detektor für magnetaufzeichnung mit amplitudenabtastung - Google Patents

Verbesserter fehlertoleranter sync-marken-detektor für magnetaufzeichnung mit amplitudenabtastung

Info

Publication number
DE69617630T2
DE69617630T2 DE69617630T DE69617630T DE69617630T2 DE 69617630 T2 DE69617630 T2 DE 69617630T2 DE 69617630 T DE69617630 T DE 69617630T DE 69617630 T DE69617630 T DE 69617630T DE 69617630 T2 DE69617630 T2 DE 69617630T2
Authority
DE
Germany
Prior art keywords
magnetic recording
improved error
amplitude scan
brand
detector
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
DE69617630T
Other languages
English (en)
Other versions
DE69617630D1 (de
Inventor
P Zook
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.)
Cirrus Logic Inc
Original Assignee
Cirrus Logic Inc
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 Cirrus Logic Inc filed Critical Cirrus Logic Inc
Publication of DE69617630D1 publication Critical patent/DE69617630D1/de
Application granted granted Critical
Publication of DE69617630T2 publication Critical patent/DE69617630T2/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
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • 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
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
    • G11B27/30—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
    • G11B27/30—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording
    • G11B27/3027—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording used signal is digitally coded
    • 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
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
    • G11B2020/1476—Synchronisation patterns; Coping with defects thereof
DE69617630T 1995-09-26 1996-09-26 Verbesserter fehlertoleranter sync-marken-detektor für magnetaufzeichnung mit amplitudenabtastung Expired - Lifetime DE69617630T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/533,797 US5793548A (en) 1995-05-12 1995-09-26 Fault tolerant sync mark detector for comparing a sign and magnitude of a detected sequence to a target sync mark in sampled amplitude magnetic recording
PCT/US1996/015582 WO1997012363A2 (en) 1995-09-26 1996-09-26 Improved fault tolerant sync mark detector for sampled amplitude magnetic recording

Publications (2)

Publication Number Publication Date
DE69617630D1 DE69617630D1 (de) 2002-01-17
DE69617630T2 true DE69617630T2 (de) 2002-05-08

Family

ID=24127478

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69617630T Expired - Lifetime DE69617630T2 (de) 1995-09-26 1996-09-26 Verbesserter fehlertoleranter sync-marken-detektor für magnetaufzeichnung mit amplitudenabtastung

Country Status (7)

Country Link
US (1) US5793548A (de)
EP (1) EP0793843B1 (de)
JP (4) JPH10510089A (de)
KR (1) KR100495715B1 (de)
DE (1) DE69617630T2 (de)
HK (1) HK1002885A1 (de)
WO (1) WO1997012363A2 (de)

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US6604204B1 (en) * 1999-09-30 2003-08-05 Stmicroelectronics, Inc. Circuit and method for recovering synchronization information from a signal
US6662338B1 (en) 1999-09-30 2003-12-09 Stmicroelectronics, Inc. Parity- sensitive Viterbi detector and method for recovering information from a read signal
US7239592B2 (en) 2000-04-03 2007-07-03 Stmicroelectronics S.A. Method for indicating a sector on a data medium and data medium suited to this method
FR2825827A1 (fr) * 2001-06-07 2002-12-13 St Microelectronics Sa Procede pour indiquer un secteur sur un support d'information et support d'information adapte a ce procede
US7170703B1 (en) * 2000-05-09 2007-01-30 Maxtor Corporation Flaw detection in disk drive using significant samples of data pattern stored on disk
US7032127B1 (en) 2000-05-09 2006-04-18 Maxtor Corporation Method and apparatus for identifying defective areas on a disk surface of a disk drive based on defect density
US6639748B1 (en) * 2001-02-28 2003-10-28 Western Digital Technologies, Inc. Disk drive that discerns the polarity of a head signal from a sync mark to enhance data detection
US6603622B1 (en) * 2001-02-28 2003-08-05 Western Digital Technologies, Inc. Disk drive employing a sync mark detector comprising a matched filter and a dual polarity correlator
US6369969B1 (en) 2001-02-28 2002-04-09 Western Digital Technologies, Inc. Disk drive for detecting a polarity error of a magnetoresistive head by detecting a sync mark
US7054398B1 (en) 2001-07-18 2006-05-30 Marvell International Ltd. Method for selecting sync marks and sync mark detectors
JP3668202B2 (ja) * 2002-03-13 2005-07-06 株式会社東芝 情報記録再生装置及びその信号評価方法
US8861667B1 (en) * 2002-07-12 2014-10-14 Rambus Inc. Clock data recovery circuit with equalizer clock calibration
US6999534B2 (en) * 2002-07-31 2006-02-14 Texas Instruments Incorporated Method for mitigating DC offset in a sign bit correlator
JP4098660B2 (ja) * 2003-04-23 2008-06-11 株式会社東芝 ディスク記憶装置及びシンクマーク検出方法
US7440210B1 (en) 2004-06-23 2008-10-21 Western Digital Technologies, Inc. Servo writing a disk drive by writing multi-bit sync marks in spiral tracks for improved servo writing
US7596940B2 (en) * 2005-03-22 2009-10-06 Pratt & Whitney Rocketdyne, Inc. Rocket engine nozzle and method of fabricating a rocket engine nozzle using pressure brazing
US7974034B1 (en) * 2006-06-07 2011-07-05 Marvell International Ltd. Systems and methods for sync mark detection using correlation
US7672071B2 (en) * 2006-06-12 2010-03-02 Broadcom Corporation Servo field preamble detector and methods for use therewith
US8264933B1 (en) * 2007-07-09 2012-09-11 Marvell International Ltd. Timing loop with large pull-in range
US8358566B1 (en) 2006-07-13 2013-01-22 Marvell International Ltd. Method and device for detecting a sync mark
KR100884003B1 (ko) * 2007-01-26 2009-02-17 삼성전자주식회사 기입 오류 방지 방법, 및 그에 따른 하드 디스크 드라이브 장치
US8159768B1 (en) 2008-06-25 2012-04-17 Western Digital Technologies, Inc. Detecting a servo address mark (SAM) in a servo field sync-up operation
US8261171B2 (en) * 2011-01-27 2012-09-04 Lsi Corporation Systems and methods for diversity combined data detection
US8687301B1 (en) 2013-01-08 2014-04-01 Lsi Corporation Parallel no-sync-mark retry
US9111573B1 (en) * 2014-04-01 2015-08-18 Avago Technologies General Ip (Singapore) Pte. Ltd. Detection of end of preamble in read channel without interpolation
US9819456B1 (en) 2016-10-17 2017-11-14 Seagate Technology Llc Preamble detection and frequency offset determination
US10164760B1 (en) 2016-10-18 2018-12-25 Seagate Technology Llc Timing excursion recovery
US10152457B1 (en) 2016-10-25 2018-12-11 Seagate Technology Llc Target parameter adaptation
US10277718B1 (en) 2016-11-22 2019-04-30 Seagate Technology Llc Preamble defect detection and mitigation
US10084553B1 (en) 2016-12-22 2018-09-25 Seagate Technology Llc Iterative recovery from baseline or timing disturbances
US9979573B1 (en) 2016-12-23 2018-05-22 Seagate Technology Llc Position error signal burst demodulation
US9954537B1 (en) 2016-12-23 2018-04-24 Seagate Technology Llc Wide frequency range clock generation with phase interpolation
US9998136B1 (en) 2017-02-17 2018-06-12 Seagate Technology Llc Loop consistency using multiple channel estimates
US10382166B1 (en) 2017-02-22 2019-08-13 Seagate Technology Llc Constrained receiver parameter optimization
US9928854B1 (en) 2017-05-03 2018-03-27 Seagate Technology Llc MISO equalization with ADC averaging

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JPH0648589B2 (ja) * 1989-02-16 1994-06-22 インターナショナル・ビジネス・マシーンズ・コーポレーション 情報記憶サブシステム用の非同期データ・チャネル
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Also Published As

Publication number Publication date
JP2007080514A (ja) 2007-03-29
DE69617630D1 (de) 2002-01-17
WO1997012363A3 (en) 1997-05-22
KR980700653A (ko) 1998-03-30
JP2011216182A (ja) 2011-10-27
JPH10510089A (ja) 1998-09-29
KR100495715B1 (ko) 2005-10-12
HK1002885A1 (en) 1998-09-25
WO1997012363A2 (en) 1997-04-03
US5793548A (en) 1998-08-11
EP0793843A1 (de) 1997-09-10
JP4793945B2 (ja) 2011-10-12
JP2009043408A (ja) 2009-02-26
EP0793843B1 (de) 2001-12-05

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