DE19983326T1 - Synchroner Digital-Demodulator mit Integrierten Lese- und Servo-Kanälen - Google Patents

Synchroner Digital-Demodulator mit Integrierten Lese- und Servo-Kanälen

Info

Publication number
DE19983326T1
DE19983326T1 DE19983326T DE19983326T DE19983326T1 DE 19983326 T1 DE19983326 T1 DE 19983326T1 DE 19983326 T DE19983326 T DE 19983326T DE 19983326 T DE19983326 T DE 19983326T DE 19983326 T1 DE19983326 T1 DE 19983326T1
Authority
DE
Germany
Prior art keywords
synchronous digital
digital demodulator
integrated read
servo channels
servo
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Withdrawn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
DE19983326T
Other languages
English (en)
Inventor
Alexei H Sacks
Timothy F Ellis
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 DE19983326T1 publication Critical patent/DE19983326T1/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Withdrawn legal-status Critical Current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
    • 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
    • G11B20/10222—Improvement or modification of read or write signals clock-related aspects, e.g. phase or frequency adjustment or bit synchronisation
    • G11B20/1024—Improvement or modification of read or write signals clock-related aspects, e.g. phase or frequency adjustment or bit synchronisation wherein a phase-locked loop [PLL] is used
    • 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
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • G11B21/08—Track changing or selecting during transducing operation
    • G11B21/081—Access to indexed tracks or parts of continuous track
    • G11B21/083—Access to indexed tracks or parts of continuous track on discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • G11B21/10—Track finding or aligning by moving the head ; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • G11B21/10—Track finding or aligning by moving the head ; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following
    • G11B21/106—Track finding or aligning by moving the head ; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following on 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
    • G11B5/48—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
    • G11B5/59605—Circuits
    • 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
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B2020/1087—Digital recording or reproducing wherein a selection is made among at least two alternative ways of processing
    • G11B2020/10888—Digital recording or reproducing wherein a selection is made among at least two alternative ways of processing the kind of data being the selection criterion
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Moving Of The Head To Find And Align With The Track (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
DE19983326T 1998-06-26 1999-06-21 Synchroner Digital-Demodulator mit Integrierten Lese- und Servo-Kanälen Withdrawn DE19983326T1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US9077698P 1998-06-26 1998-06-26
US09/268,009 US6181505B1 (en) 1998-06-26 1999-03-15 Synchronous digital demodulator with integrated read and servo channels
PCT/US1999/013969 WO2000000976A2 (en) 1998-06-26 1999-06-21 Synchronous digital demodulator with integrated read and servo channels

Publications (1)

Publication Number Publication Date
DE19983326T1 true DE19983326T1 (de) 2001-05-31

Family

ID=26782614

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19983326T Withdrawn DE19983326T1 (de) 1998-06-26 1999-06-21 Synchroner Digital-Demodulator mit Integrierten Lese- und Servo-Kanälen

Country Status (7)

Country Link
US (1) US6181505B1 (de)
JP (1) JP2002519807A (de)
KR (1) KR100570558B1 (de)
CN (1) CN1307720A (de)
DE (1) DE19983326T1 (de)
GB (1) GB2356486B (de)
WO (1) WO2000000976A2 (de)

Families Citing this family (61)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU4430000A (en) * 1999-05-11 2000-11-21 Hitachi Maxell, Ltd. Information recording medium, information recording / reproducing head, and information storage device
US6603630B1 (en) * 1999-12-28 2003-08-05 International Business Machines Corporation Method and apparatus for monitoring track misregistration
US6678110B2 (en) 2000-12-05 2004-01-13 Seagate Technology Llc Robust servo demodulation filtering method
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
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
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
US7190754B1 (en) * 2001-12-24 2007-03-13 Rambus Inc. Transceiver with selectable data rate
JP3966514B2 (ja) * 2002-05-23 2007-08-29 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 記憶装置、および記憶装置を操作する方法
EP1365395B1 (de) * 2002-05-23 2012-09-05 International Business Machines Corporation Speichervorrichtung und Betriebsverfahren
US6826140B2 (en) * 2002-08-26 2004-11-30 Bae Systems Information And Electronic Systems Integration Inc Multichannel digital recording system with multi-user detection
US7006315B2 (en) * 2002-12-27 2006-02-28 Matsushita Electric Industrial Co., Ltd. Systems for improving servo-demodulation robustness
US6943981B2 (en) * 2002-12-27 2005-09-13 Matsushita Electric Co., Ltd. Methods for improving servo-demodulation robustness
US7006311B2 (en) * 2002-12-27 2006-02-28 Matsushita Electric Industrial Co., Ltd Systems for preventing channel control values from being corrupted to thereby improve servo-demodulation robustness
US6995935B2 (en) * 2002-12-27 2006-02-07 Matsushita Electric Industrial Co., Ltd. Methods for detecting multiple occurrences of a SAM pattern to thereby improve servo-demodulation robustness
US7006312B2 (en) * 2002-12-27 2006-02-28 Matsushita Electic Industrial Co., Ltd. Methods for preventing channel control values from being corrupted to thereby improve servo-demodulation robustness
US7016133B2 (en) * 2002-12-27 2006-03-21 Matsushita Electric Industrial Co., Ltd. Systems for detecting multiple occurrences of a SAM pattern to thereby improve servo-demodulation robustness
JP2004253056A (ja) * 2003-02-20 2004-09-09 Sanyo Electric Co Ltd デコード装置
US7072128B2 (en) * 2003-07-16 2006-07-04 Matsushita Electric Industrial Co., Ltd. Methods for searching for SAM patterns at multiple nominal frequencies
US7075742B2 (en) * 2003-07-16 2006-07-11 Matsushita Electric Industrial Co., Ltd. Servo demodulator systems including multiple servo demodulators
US7092177B2 (en) * 2003-07-16 2006-08-15 Matsushita Electric Industrial Co., Ltd. Methods for searching for SAM patterns using multiple sets of servo demodulation detection parameters
US7054083B2 (en) * 2003-07-16 2006-05-30 Matsushita Electric Industrial Co., Ltd. Systems for searching for SAM patterns at multiple nominal frequencies
US6992855B2 (en) * 2003-09-18 2006-01-31 Matsushita Electric Industrial Co., Ltd. Methods for limiting channel control values to thereby improve servo-demodulation robustness
US6992856B2 (en) * 2003-09-18 2006-01-31 Matsushita Electric Industrial Co., Ltd. Systems for limiting channel control values to thereby improve servo-demodulation robustness
US7203017B1 (en) * 2003-09-23 2007-04-10 Marvell International Ltd. Timing recovery for data storage channels with buffered sectors
US7193801B2 (en) * 2004-11-18 2007-03-20 Agere Systems, Inc. Method and apparatus for testing a servo circuit of a read/write head system
US7064914B1 (en) 2004-12-22 2006-06-20 Seagate Technology Llc Position error signal quality
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
US7508611B2 (en) * 2005-10-07 2009-03-24 Seagate Technology, Llc Disk drive clock circuit that adjusts clock edge timing in response to servo information and methods thereof
JP4489039B2 (ja) 2006-03-07 2010-06-23 東芝ストレージデバイス株式会社 位置決め制御装置、及びディスク装置
JP4825624B2 (ja) 2006-08-30 2011-11-30 東芝ストレージデバイス株式会社 制御装置、記憶装置、記憶媒体、サーボ情報復調プログラム及びサーボ情報復調方法
US7924523B2 (en) * 2007-12-21 2011-04-12 Lsi Corporation Frequency domain approach for efficient computation of fixed-point equalization targets
CN101743591B (zh) * 2007-12-21 2013-03-06 Lsi公司 用于记录通道中自适应均衡的系统和方法
US7957084B2 (en) * 2008-02-04 2011-06-07 Seagate Technology Llc Extraction of transducer position information from bit patterned magnetic media
US7924518B2 (en) * 2008-08-27 2011-04-12 Lsi Corporation Systems and methods for adaptive write pre-compensation
US9281908B2 (en) * 2008-10-08 2016-03-08 Avago Technologies General Ip (Singapore) Pte. Ltd. Systems and methods for memory efficient signal and noise estimation
US8339722B1 (en) 2008-11-17 2012-12-25 Marvell International Ltd. Methods of demodulating a servo positon error signal on patterned media
US7948702B2 (en) * 2008-12-18 2011-05-24 Lsi Corporation Systems and methods for controlling data equalization
US7929240B2 (en) * 2008-12-18 2011-04-19 Lsi Corporation Systems and methods for adaptive MRA compensation
US8154815B2 (en) * 2008-12-18 2012-04-10 Lsi Corporation Systems and methods for generating equalization data using shift register architecture
US7965467B2 (en) * 2008-12-18 2011-06-21 Lsi Corporation Systems and methods for generating equalization data
US7974030B2 (en) 2008-12-23 2011-07-05 Lsi Corporation Systems and methods for dibit correction
US7948699B2 (en) * 2009-01-02 2011-05-24 Lsi Corporation Systems and methods for equalizer optimization in a storage access retry
US8045282B2 (en) * 2009-02-03 2011-10-25 Seagate Technology Llc Measurement of track eccentricity on bit patterned media
US7957251B2 (en) 2009-02-16 2011-06-07 Agere Systems Inc. Systems and methods for reduced latency loop recovery
US7872821B2 (en) * 2009-04-28 2011-01-18 Lsi Corporation Systems and methods for Nyquist tone harmonic measurements
US7969337B2 (en) * 2009-07-27 2011-06-28 Lsi Corporation Systems and methods for two tier sampling correction in a data processing circuit
US8139305B2 (en) * 2009-09-14 2012-03-20 Lsi Corporation Systems and methods for timing and gain acquisition
JP5460381B2 (ja) * 2010-02-26 2014-04-02 株式会社日立ハイテクノロジーズ 検出回路および検査装置
US8854752B2 (en) 2011-05-03 2014-10-07 Lsi Corporation Systems and methods for track width determination
US8762440B2 (en) 2011-07-11 2014-06-24 Lsi Corporation Systems and methods for area efficient noise predictive filter calibration
US8773811B2 (en) * 2011-12-12 2014-07-08 Lsi Corporation Systems and methods for zone servo timing gain recovery
CN103185822B (zh) * 2011-12-29 2016-09-07 北京普源精电科技有限公司 一种采样时钟可变的示波器
US9112538B2 (en) 2013-03-13 2015-08-18 Avago Technologies General Ip (Singapore) Pte. Ltd. Systems and methods for loop feedback
US8848776B1 (en) 2013-03-25 2014-09-30 Lsi Corporation Systems and methods for multi-dimensional signal equalization
US8929010B1 (en) 2013-08-21 2015-01-06 Lsi Corporation Systems and methods for loop pulse estimation
CN103645658B (zh) * 2013-11-25 2016-02-10 北京经纬恒润科技有限公司 一种多片信号转换器的相位同步方法、装置及fpga控制器
US9953671B1 (en) * 2017-07-31 2018-04-24 Oracle International Corporation Saturation-based verification of magnetic tape storage
US10509104B1 (en) 2018-08-13 2019-12-17 Analog Devices Global Unlimited Company Apparatus and methods for synchronization of radar chips
CN110602011B (zh) * 2019-08-16 2021-11-19 华东师范大学 一种基于锁相环的数字信号调制解调电路及调制解调方法

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI87498C (fi) 1982-05-10 1993-01-11 Digital Equipment Corp Magnetisk skivenhet och foerfarande foer att placera avlaesnings-skrivhuvudet i en magnetisk skivenhet
US4678103A (en) 1986-03-27 1987-07-07 The Procter & Gamble Company Plural-chambered dispensing device exhibiting constant proportional co-dispensing and method for making same
JPS6443879A (en) 1987-08-06 1989-02-16 Ibm Method and apparatus for control of positioning of head
US5136439A (en) 1989-09-29 1992-08-04 Seagate Technology, Inc. Sectored servo position demodulator system
US5117408A (en) 1989-09-29 1992-05-26 Seagate Technology, Inc. Correlation of sectored servo position information
US5089757A (en) 1991-03-15 1992-02-18 Maxtor Corporation Synchronous digital detection of position error signal
US5341249A (en) 1992-08-27 1994-08-23 Quantum Corporation Disk drive using PRML class IV sampling data detection with digital adaptive equalization
US5602692A (en) 1994-10-07 1997-02-11 International Business Machines Corporation Sampled position error signal demodulation system for banded data disk drives
US5576906A (en) 1994-10-11 1996-11-19 Quantum Corporation Synchronous detection of concurrent servo bursts for fine head position in disk drive
US5668678B1 (en) 1994-11-14 2000-11-28 Cirrus Logic Inc Detecting servo data and servo bursts from discrete time samples of an analog read signal in a sampled amplitude read channel
JP3360990B2 (ja) 1995-09-20 2003-01-07 株式会社東芝 ディスク記録再生装置のデータ再生処理装置
US5867341A (en) 1996-01-30 1999-02-02 Seagate Technology, Inc. Disc drive system using multiple pairs of embedded servo bursts
US5982721A (en) 1996-03-29 1999-11-09 Cirrus Logic, Inc. Optical disc drive comprising switching gains for forcing phase states to follow a sliding line trajectory in a servo system
US5825579A (en) 1996-04-04 1998-10-20 International Business Machines Corporation Disk drive servo sensing gain normalization and linearization
SG55370A1 (en) 1996-09-09 1998-12-21 Texas Instruments Inc Servo demodulator and method for synchronous servo demodulation

Also Published As

Publication number Publication date
KR100570558B1 (ko) 2006-04-13
GB2356486B (en) 2002-05-29
GB2356486A (en) 2001-05-23
WO2000000976A2 (en) 2000-01-06
JP2002519807A (ja) 2002-07-02
KR20010053207A (ko) 2001-06-25
GB0030961D0 (en) 2001-01-31
US6181505B1 (en) 2001-01-30
CN1307720A (zh) 2001-08-08
WO2000000976A3 (en) 2000-03-16

Similar Documents

Publication Publication Date Title
DE19983326T1 (de) Synchroner Digital-Demodulator mit Integrierten Lese- und Servo-Kanälen
NO20011192L (no) Ranolazinpreparater med depotvirkning
DE69418628T2 (de) Kombinationswaage mit segmentierten ineinandergreifenden elementen
ATE454018T1 (de) Matrixkodierte raumklangkanäle in diskretem digital-schallformat
DE69728385D1 (de) Digitalaufzeichnungsverfahren
FR2765428B1 (fr) Demodulateur numerique
EE200000552A (et) Demodulaator
DE69800600D1 (de) Digitalaufzeichungs-/-wiedergabegerät
BR9611785A (pt) Demodulador digital
DE69733222D1 (de) Digitaler FM-Demodulator
DE1052819T1 (de) Digitaler demodulator
DE69708160D1 (de) Digitale addierschaltung
DE69735252D1 (de) Demodulator
DE59609450D1 (de) Digitaler Demodulator
DE69835101D1 (de) Digitaler Demodulator
DE69821674D1 (de) Digitales Aufzeichnungs-/Wiedergabegerät
DE69731156D1 (de) Digitale Aufzeichnungs- und Wiedergabe-Einheit
FR2748879B1 (fr) Demodulateur numerique de signal module en phase
DE69940759D1 (de) Digitale Klangregelung mit Koeffizienten in linearen Schritten
EE200000553A (et) Demodulaator
DE69736255D1 (de) Digitale Aufnahmeanlage mit Spezial-Abspielwirkung
FI982041A (fi) FM-demodulaattori
EE9800023A (et) Digitaalse demodulatsiooni meetod
BR9401817A (pt) Micrômetro digital registrador
DE69939222D1 (de) Digitaler i/q-demodulator in integrierter schaltkreistechnik

Legal Events

Date Code Title Description
8127 New person/name/address of the applicant

Owner name: SEAGATE TECHNOLOGY LLC, SCOTTS VALLEY, CALIF., US

8139 Disposal/non-payment of the annual fee
8170 Reinstatement of the former position
8139 Disposal/non-payment of the annual fee