JP2003022625A - 磁気記録用プリアンブルパターン及び磁気記録装置 - Google Patents

磁気記録用プリアンブルパターン及び磁気記録装置

Info

Publication number
JP2003022625A
JP2003022625A JP2001208681A JP2001208681A JP2003022625A JP 2003022625 A JP2003022625 A JP 2003022625A JP 2001208681 A JP2001208681 A JP 2001208681A JP 2001208681 A JP2001208681 A JP 2001208681A JP 2003022625 A JP2003022625 A JP 2003022625A
Authority
JP
Japan
Prior art keywords
data
phase
preamble pattern
amplitude
sampling
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.)
Pending
Application number
JP2001208681A
Other languages
English (en)
Japanese (ja)
Other versions
JP2003022625A5 (enExample
Inventor
Hiroyuki Tsuchinaga
浩之 土永
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP2001208681A priority Critical patent/JP2003022625A/ja
Priority to US10/038,833 priority patent/US6785074B2/en
Publication of JP2003022625A publication Critical patent/JP2003022625A/ja
Priority to US10/924,815 priority patent/US7142379B2/en
Publication of JP2003022625A5 publication Critical patent/JP2003022625A5/ja
Pending 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
    • 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
    • G11B20/10101—PR2 or PR(1,2,1), i.e. partial response class 2, polynomial (1+D)2=1+2D+D2
    • 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
    • G11B20/22—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
    • 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
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/08—Details of the phase-locked loop
    • H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
    • H03L7/091—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal the phase or frequency detector using a sampling device
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Algebra (AREA)
  • Pure & Applied Mathematics (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
JP2001208681A 2001-07-10 2001-07-10 磁気記録用プリアンブルパターン及び磁気記録装置 Pending JP2003022625A (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2001208681A JP2003022625A (ja) 2001-07-10 2001-07-10 磁気記録用プリアンブルパターン及び磁気記録装置
US10/038,833 US6785074B2 (en) 2001-07-10 2002-01-08 Preamble pattern and magnetic recording system using the pattern
US10/924,815 US7142379B2 (en) 2001-07-10 2004-08-25 Preamble pattern and magnetic recording system using the pattern

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001208681A JP2003022625A (ja) 2001-07-10 2001-07-10 磁気記録用プリアンブルパターン及び磁気記録装置

Publications (2)

Publication Number Publication Date
JP2003022625A true JP2003022625A (ja) 2003-01-24
JP2003022625A5 JP2003022625A5 (enExample) 2005-05-19

Family

ID=19044459

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001208681A Pending JP2003022625A (ja) 2001-07-10 2001-07-10 磁気記録用プリアンブルパターン及び磁気記録装置

Country Status (2)

Country Link
US (2) US6785074B2 (enExample)
JP (1) JP2003022625A (enExample)

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US7085121B2 (en) 2002-10-21 2006-08-01 Hrl Laboratories, Llc Variable capacitance membrane actuator for wide band tuning of microstrip resonators and filters
KR100519805B1 (ko) * 2002-11-26 2005-10-11 한국전자통신연구원 다중레벨 변조 기법을 위한 타이밍 동기루프 제어 장치를이용한 심볼 타이밍 동기 장치 및 그 방법
AU2002354139A1 (en) * 2002-11-29 2004-06-23 Fujitsu Limited Data reproducing apparatus having phase difference corrector and data head detector
US7002761B1 (en) 2003-03-27 2006-02-21 Marvell International Ltd. Demodulation compensation for spiral servo tracks in hard disk drives
WO2005024803A1 (ja) * 2003-08-29 2005-03-17 Fujitsu Limited データ再生装置
US7595948B1 (en) * 2003-10-24 2009-09-29 Marvell International Ltd. Thermal asperity detection for perpendicular magnetic recording
JP2006179128A (ja) * 2004-12-22 2006-07-06 Toshiba Corp 磁気記録媒体、磁気記録再生装置および磁気記録媒体を製造するためのスタンパ
US7889823B2 (en) * 2005-03-03 2011-02-15 Seagate Technology Llc Timing recovery in a parallel channel communication system
US7768732B2 (en) * 2005-04-12 2010-08-03 Stmicroelectronics, Inc. Gain controller for a gain loop of a read channel and related gain loops, read channels, systems, and methods
US7773324B2 (en) * 2005-04-12 2010-08-10 Stmicroelectronics, Inc. Phase acquisition loop for a read channel and related read channel, system, and method
US7564931B2 (en) * 2005-05-10 2009-07-21 Seagate Technology Llc Robust maximum-likelihood based timing recovery
US7602567B2 (en) * 2007-06-28 2009-10-13 Lsi Corporation Feed-forward DC restoration in a perpendicular magnetic read channel
US8569221B2 (en) * 2007-08-30 2013-10-29 Kimberly-Clark Worldwide, Inc. Stain-discharging and removing system
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
US8203800B2 (en) * 2009-03-05 2012-06-19 Western Digital (Fremont), Llc Servo design in data storage media
JP4724241B2 (ja) * 2009-07-09 2011-07-13 株式会社東芝 ディスク記憶装置及びデータ検出方法
US8730605B1 (en) * 2011-01-13 2014-05-20 Marvell International Ltd. Write zero phase start for phase synchronization in bit patterned recording
CN106774801A (zh) 2016-12-09 2017-05-31 郑州云海信息技术有限公司 一种硬盘错峰启动系统
US11979163B2 (en) * 2022-10-03 2024-05-07 Western Digital Technologies, Inc. Oversampled phase lock loop in a read channel

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3778549D1 (de) * 1987-11-13 1992-05-27 Ibm Schnelle takterfassung fuer partial-response-signalisierung.
US5258933A (en) 1992-08-27 1993-11-02 Quantum Corporation Timing control for PRML class IV sampling data detection channel
US5552942A (en) 1994-08-23 1996-09-03 Quantum Corporation Zero phase start optimization using mean squared error in a PRML recording channel
JPH08315517A (ja) 1995-05-19 1996-11-29 Toshiba Corp ディスク記録再生装置のデータ再生処理システム
JP2000021096A (ja) 1998-07-03 2000-01-21 Hitachi Ltd 磁気ディスク装置及びそれに用いる半導体デバイス
BR0106432B1 (pt) * 2000-05-16 2014-11-18 Koninkjijke Philips Electronics N V "portador de informação, método e dispositivo de gravação para escrever padrões de informação, e, dispositivo de leitura para reproduzir informação de um portador de informação"

Also Published As

Publication number Publication date
US7142379B2 (en) 2006-11-28
US20030011920A1 (en) 2003-01-16
US20050018337A1 (en) 2005-01-27
US6785074B2 (en) 2004-08-31

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