DE69634476D1 - Digitale regelungsinformationen in breiter biphasenform, erfassung und schätzungfür plattenlaufwerke mittels viterbi-erfassung - Google Patents

Digitale regelungsinformationen in breiter biphasenform, erfassung und schätzungfür plattenlaufwerke mittels viterbi-erfassung

Info

Publication number
DE69634476D1
DE69634476D1 DE69634476T DE69634476T DE69634476D1 DE 69634476 D1 DE69634476 D1 DE 69634476D1 DE 69634476 T DE69634476 T DE 69634476T DE 69634476 T DE69634476 T DE 69634476T DE 69634476 D1 DE69634476 D1 DE 69634476D1
Authority
DE
Germany
Prior art keywords
detection
biphase
estimation
wider
formulation
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 - Fee Related
Application number
DE69634476T
Other languages
English (en)
Other versions
DE69634476T2 (de
Inventor
Ara Patapoutian
P Vea
C Nguyen
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.)
Maxtor Corp
Original Assignee
Maxtor 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 Maxtor Corp filed Critical Maxtor Corp
Application granted granted Critical
Publication of DE69634476D1 publication Critical patent/DE69634476D1/de
Publication of DE69634476T2 publication Critical patent/DE69634476T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/4904—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using self-synchronising codes, e.g. split-phase 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
    • 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
    • G11B5/48—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
    • G11B5/54—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 into or out of its operative position or across tracks
    • G11B5/55—Track change, selection or acquisition by displacement of the head
    • G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
    • G11B5/5526—Control therefor; circuits, track configurations or relative disposition of servo-information transducers and servo-information tracks for control thereof
    • 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
    • G11B5/59688—Servo signal format patterns or signal processing thereof, e.g. dual, tri, quad, burst signal patterns
    • 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
    • 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
    • G11B5/59633—Servo formatting
    • G11B5/5965—Embedded servo format
DE69634476T 1995-10-23 1996-10-17 Digitale Regelungsinformationen in breiter Biphasenform, Erfassung und Schätzung für Plattenlaufwerke mittels Viterbi-Erfassung Expired - Fee Related DE69634476T2 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US601395P 1995-10-23 1995-10-23
US6013P 1995-10-23
US686998 1996-07-24
US08/686,998 US5661760A (en) 1995-10-23 1996-07-24 Wide biphase digital servo information detection, and estimation for disk drive using servo Viterbi detector
PCT/US1996/016793 WO1997016011A1 (en) 1995-10-23 1996-10-17 Wide biphase digital servo information, detection, and estimation for disk drive using viterbi detection

Publications (2)

Publication Number Publication Date
DE69634476D1 true DE69634476D1 (de) 2005-04-21
DE69634476T2 DE69634476T2 (de) 2006-02-23

Family

ID=26675048

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69634476T Expired - Fee Related DE69634476T2 (de) 1995-10-23 1996-10-17 Digitale Regelungsinformationen in breiter Biphasenform, Erfassung und Schätzung für Plattenlaufwerke mittels Viterbi-Erfassung

Country Status (8)

Country Link
US (1) US5661760A (de)
EP (1) EP0803158B1 (de)
JP (1) JP4014633B2 (de)
CN (1) CN1194074A (de)
AU (1) AU7458996A (de)
CA (1) CA2207899A1 (de)
DE (1) DE69634476T2 (de)
WO (1) WO1997016011A1 (de)

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US5829011A (en) * 1997-01-31 1998-10-27 Texas Instruments Incorporated Apparatus and method of exchanging data and operational parameters in a mass storage system
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US6345074B1 (en) 1998-03-20 2002-02-05 Cirrus Logic, Inc. Maximum likelihood servo detector for detecting an error correcting servo code recorded on a disc storage medium
US6201652B1 (en) * 1998-05-29 2001-03-13 Stmicroelectronics, Inc. Method and apparatus for reading and writing gray code servo data to magnetic medium using synchronous detection
US6604223B1 (en) * 1998-08-17 2003-08-05 Seagate Technology Llc System and method for correcting interference errors in data encoded on storage media
US6304407B1 (en) 1998-10-27 2001-10-16 Maxtor Corporation Self-writing of servo patterns based on printed reference pattern in rotating disk drive
US6397369B1 (en) * 1998-11-06 2002-05-28 Acorn Technologies, Inc. Device for using information about the extent of errors in a signal and method
US6288860B1 (en) * 1999-01-04 2001-09-11 Maxtor Corporation Servo area numbering strategy for computer disk drives
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US6424686B1 (en) 1999-03-31 2002-07-23 International Business Machines Corporation Maximum likelihood detection with difference metrics and programmed coefficients
US6526104B1 (en) 1999-03-31 2003-02-25 International Business Machines Corporation Maximum likelihood detection with programmed coefficients
US6657802B1 (en) * 1999-04-16 2003-12-02 Infineon Technologies Corporation Phase assisted synchronization detector
EP1090393B1 (de) * 1999-04-20 2006-09-13 Koninklijke Philips Electronics N.V. Servoformat für platten, vorzugsweise festplatten
US6594217B1 (en) * 1999-06-22 2003-07-15 Cirrus Logic, Inc. Servo synch mark processing in a disk drive system
US6606728B1 (en) 1999-06-23 2003-08-12 Agere Systems Inc. Rate (M/N) code encoder, detector, and decoder for control data
US6480984B1 (en) * 1999-06-23 2002-11-12 Agere Systems Inc. Rate (M/N) code encoder, detector, and decoder for control data
JP2001028111A (ja) * 1999-07-13 2001-01-30 Hitachi Ltd 磁気ディスク装置
JP3886300B2 (ja) * 1999-07-21 2007-02-28 富士通株式会社 信号処理装置及びその信号処理方法
US6353315B1 (en) 1999-08-27 2002-03-05 Maxtor Corporation Method and apparatus for using the data interface of a disk drive to identify and characterize disk flaws
US6446236B1 (en) 1999-10-13 2002-09-03 Maxtor Corporation Reading encoded information subject to random and transient errors
US6545836B1 (en) 1999-11-12 2003-04-08 Acorn Technologies, Inc. Servo control apparatus and method using absolute value input signals
US6594103B1 (en) 1999-11-12 2003-07-15 Acorn Technologies, Inc. Read channel generating absolute value servo signal
US6704156B1 (en) 2000-01-31 2004-03-09 Maxtor Corporation Self-writing of servo patterns in a disk drive using a printed reference pattern
US6657800B1 (en) * 2001-02-14 2003-12-02 Stmicroelectronics, Inc. Viterbi detector and method for recovering a binary sequence from a read signal
US6587291B2 (en) 2001-05-07 2003-07-01 Maxtor Corporation Asynchronously sampling wide bi-phase codes
US7382568B2 (en) * 2001-06-28 2008-06-03 Stmicroelectronics, Inc. Circuit and method for detecting a servo wedge on spin-up of a data-storage disk
US7830630B2 (en) * 2001-06-28 2010-11-09 Stmicroelectronics, Inc. Circuit and method for detecting the phase of a servo signal
US7839594B2 (en) * 2001-06-28 2010-11-23 Stmicroelectronics, Inc. Data-storage disk having few or no spin-up wedges and method for writing servo wedges onto the disk
US7027247B2 (en) 2001-06-28 2006-04-11 Stmicroelectronics, Inc. Servo circuit having a synchronous servo channel and method for synchronously recovering servo data
US7430082B2 (en) * 2001-06-28 2008-09-30 Stmicroelectronics, Inc. Circuit and method for demodulating a servo position burst
US20030011918A1 (en) * 2001-06-28 2003-01-16 Stmicroelectronics, Inc. Data code and method for coding data
US7206149B2 (en) * 2001-06-28 2007-04-17 Stmicroelectronics, Inc. Circuit and method for detecting a spin-up wedge and a corresponding servo wedge on spin up of a data-storage disk
US7440208B1 (en) * 2001-09-21 2008-10-21 Maxtor Corporation Flexible partial response targets for data detectors
US6934102B2 (en) * 2001-12-28 2005-08-23 Stmicroeletronics S.R.L. Encoding and decoding process and corresponding data detector
US7116736B2 (en) 2002-01-02 2006-10-03 International Business Machines Corporation Method, system, and program for synchronization and resynchronization of a data stream
US6985320B2 (en) * 2002-01-02 2006-01-10 International Business Machines Corporation Method and apparatus for encoding data to guarantee isolated transitions in a magnetic recording system
US7131052B2 (en) * 2002-08-12 2006-10-31 International Business Machines Corporation Algebraic decoder and method for correcting an arbitrary mixture of burst and random errors
EP1443509A3 (de) * 2003-01-28 2006-01-11 Kabushiki Kaisha Toshiba Verfahren zur Signalauswertung, Vorrichtung zur Informationsaufzeichung/-wiedergabe, Informationswiedergabevorrichtung und Informationsaufzeichnungsmedium
EP1593119A1 (de) * 2003-02-14 2005-11-09 Bill Richard Baker Zusammengesetzte phasencodierung für druckservomuster
US6912099B2 (en) * 2003-05-13 2005-06-28 Agere Systems Inc. Maximum likelihood detection of asynchronous servo data employing interpolation
US7499233B1 (en) * 2004-04-20 2009-03-03 Marvell International Ltd. Multi-phase control information detection and signal polarity determination
US7583458B2 (en) * 2004-07-28 2009-09-01 Agere Systems Inc. Channel optimization metrics
JP2006065918A (ja) * 2004-08-25 2006-03-09 Tdk Corp 磁気記録再生装置
US7206146B2 (en) * 2004-10-27 2007-04-17 Hitachi Global Storage Technologies Netherlands B.V. Biphase magnetic pattern detector using multiple matched filters for hard disk drive
KR100712503B1 (ko) * 2005-01-13 2007-05-02 삼성전자주식회사 하드디스크 드라이브의 서보 데이터 작성 방법 및 이를이용한 셀프 서보 기록 방법
US7738202B1 (en) * 2005-10-07 2010-06-15 Seagate Technology, Llc Wide-biphase-detector quality monitor for sensing of pin layer reversal
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US8369190B2 (en) * 2010-06-15 2013-02-05 Texas Instruments Incorporated Proximity sensing system
JP6050059B2 (ja) * 2012-08-30 2016-12-21 日本電産サンキョー株式会社 データ復調装置、データ復調方法、磁気記録データ再生装置、およびプログラム
US9053743B2 (en) 2013-03-11 2015-06-09 Avago Technologies General Ip (Singapore) Pte. Ltd. Servo marginalization
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Also Published As

Publication number Publication date
EP0803158B1 (de) 2005-03-16
CA2207899A1 (en) 1997-05-01
US5661760A (en) 1997-08-26
JP4014633B2 (ja) 2007-11-28
EP0803158A1 (de) 1997-10-29
CN1194074A (zh) 1998-09-23
EP0803158A4 (de) 1997-11-12
DE69634476T2 (de) 2006-02-23
JPH10512384A (ja) 1998-11-24
AU7458996A (en) 1997-05-15
WO1997016011A1 (en) 1997-05-01

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Legal Events

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8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee