DE19983241T1 - Verfahren und Vorrichtung mit Feld-Rationing-Demodulationstechniken für ein Servo-Muster vom Null-Typ - Google Patents
Verfahren und Vorrichtung mit Feld-Rationing-Demodulationstechniken für ein Servo-Muster vom Null-TypInfo
- Publication number
- DE19983241T1 DE19983241T1 DE19983241T DE19983241T DE19983241T1 DE 19983241 T1 DE19983241 T1 DE 19983241T1 DE 19983241 T DE19983241 T DE 19983241T DE 19983241 T DE19983241 T DE 19983241T DE 19983241 T1 DE19983241 T1 DE 19983241T1
- Authority
- DE
- Germany
- Prior art keywords
- rationing
- zero
- field
- servo pattern
- type 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- Withdrawn
Links
Classifications
-
- 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
-
- 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
- G11B5/5552—Track change, selection or acquisition by displacement of the head across disk tracks using fine positioning means for track acquisition separate from the coarse (e.g. track changing) positioning means
-
- 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
- G11B5/59655—Sector, sample or burst servo format
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US8627898P | 1998-05-21 | 1998-05-21 | |
US09/268,118 US6195220B1 (en) | 1998-05-21 | 1999-03-15 | Method and apparatus utilizing field ratioing demodulation techniques for a null-type servo pattern |
PCT/US1999/009312 WO1999060571A1 (en) | 1998-05-21 | 1999-04-29 | Method and apparatus utilizing field ratioing demodulation techniques for a null-type servo pattern |
Publications (1)
Publication Number | Publication Date |
---|---|
DE19983241T1 true DE19983241T1 (de) | 2001-05-10 |
Family
ID=26774565
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19983241T Withdrawn DE19983241T1 (de) | 1998-05-21 | 1999-04-29 | Verfahren und Vorrichtung mit Feld-Rationing-Demodulationstechniken für ein Servo-Muster vom Null-Typ |
Country Status (7)
Country | Link |
---|---|
US (2) | US6195220B1 (de) |
JP (1) | JP4357745B2 (de) |
KR (1) | KR100629019B1 (de) |
CN (1) | CN1138271C (de) |
DE (1) | DE19983241T1 (de) |
GB (1) | GB2354628B (de) |
WO (1) | WO1999060571A1 (de) |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6333202B1 (en) * | 1999-08-26 | 2001-12-25 | International Business Machines Corporation | Flip FERAM cell and method to form same |
US6700728B2 (en) * | 2001-06-04 | 2004-03-02 | International Business Machines Corporation | Method and disk drive for enhanced performance in the presence of stationary PES outliers |
US6710951B1 (en) * | 2001-10-31 | 2004-03-23 | Western Digital Technologies, Inc. | Phase locked loop employing a fractional frequency synthesizer as a variable oscillator |
US7064914B1 (en) | 2004-12-22 | 2006-06-20 | Seagate Technology Llc | Position error signal quality |
US7440224B2 (en) * | 2006-01-23 | 2008-10-21 | Toshiba Corporation | Disk drive servo |
US7721049B2 (en) * | 2006-03-27 | 2010-05-18 | Kabuhsiki Kaisha Toshiba | Disk drive write method |
US7457066B2 (en) * | 2006-05-31 | 2008-11-25 | Kabushiki Kiasha Toshiba | Method and apparatus for phase-shift null-burst-pattern |
US7453660B2 (en) * | 2006-05-31 | 2008-11-18 | Kabushiki Kaisha Toshiba | Shock feed forward adaptive filters |
US20070279790A1 (en) * | 2006-05-31 | 2007-12-06 | Tanner Brian K | Adjustable output voltage regulator for disk drive |
US20070279788A1 (en) * | 2006-05-31 | 2007-12-06 | Toshiba America Information Systems, Inc. | Method and apparatus to perform defect scanning |
US20070279782A1 (en) * | 2006-05-31 | 2007-12-06 | Rydhan Abdul R | Method and apparatus for determining offset between read and write transducers in a disk drive |
US7436616B2 (en) * | 2006-05-31 | 2008-10-14 | Toshiba Corporation | Current pulsing for unloading |
US20070279781A1 (en) * | 2006-05-31 | 2007-12-06 | Toshiba America Information Systems, Inc. | Channel training method and apparatus |
US7468859B2 (en) * | 2006-05-31 | 2008-12-23 | Kabushiki Kaisha Toshiba | Voice coil motor effective resistance determination |
KR100889961B1 (ko) * | 2007-04-30 | 2009-03-24 | (주)컨벡스 | 스텝 모터 위치 오차 보정 방법 및 시스템 |
US7688538B1 (en) | 2007-11-16 | 2010-03-30 | Western Digital Technologies, Inc. | Disk drive comprising a disk surface having track addresses of varying width |
US7576942B1 (en) * | 2008-04-22 | 2009-08-18 | Seagate Technology Llc | Servo sector format with large lithographic tolerances |
US8339722B1 (en) * | 2008-11-17 | 2012-12-25 | Marvell International Ltd. | Methods of demodulating a servo positon error signal on patterned media |
US9514775B2 (en) * | 2008-11-25 | 2016-12-06 | Seagate Technology Llc | Reducing effect of frequency acquisition error in a position error signal responsive to split servo burst patterns |
US7986488B2 (en) * | 2008-12-04 | 2011-07-26 | Hitachi Global Storage Technologies Netherlands B.V. | Magnetic recording disk and disk drive with alternating single-polarity position error signal (PES) blocks for read/write head positioning |
US7995304B2 (en) * | 2009-05-27 | 2011-08-09 | Seagate Technology Llc | Circuits that use a postamble signal to determine phase and frequency errors in the acquisition of a preamble signal |
JP5162004B2 (ja) * | 2011-05-20 | 2013-03-13 | 株式会社東芝 | 位置復調装置、及び位置復調方法 |
US8625231B1 (en) * | 2012-11-08 | 2014-01-07 | HGST Netherlands B.V. | Adjusting VGA analog gain for misaligned servo sectors in a disk drive |
US10913550B2 (en) | 2018-03-23 | 2021-02-09 | The Boeing Company | System and method for position and speed feedback control |
US10911061B2 (en) * | 2018-03-23 | 2021-02-02 | The Boeing Company | System and method for demodulation of resolver outputs |
Family Cites Families (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2039078B (en) | 1978-12-27 | 1982-11-24 | Ibm | Sampled data servo positioning system |
ATE98038T1 (de) | 1982-05-10 | 1993-12-15 | Digital Equipment Corp | Positioniersteuerungsverfahren mit sowohl kontinuierlichen als auch angefuegten informationen fuer einen magnetplattenspeicher. |
DE3277601D1 (en) | 1982-06-18 | 1987-12-10 | Ibm | Magnetizable recording disk and disk file employing servo sector head positioning |
US4535372A (en) | 1983-06-29 | 1985-08-13 | Storage Technology Corporation | Position tracking servo control systems and methods |
US4679103A (en) | 1986-04-29 | 1987-07-07 | International Business Machines Corporation | Digital servo control system for a data recording disk file |
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 |
US5041926A (en) | 1989-11-13 | 1991-08-20 | Hewlett-Packard Company | Track position syncopation cancellation in a disk drive |
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 |
JPH07192238A (ja) | 1993-11-23 | 1995-07-28 | Internatl Business Mach Corp <Ibm> | ディスク・ドライブ・サーボ制御装置 |
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 |
US5717538A (en) * | 1995-01-20 | 1998-02-10 | International Business Machines Corporation | Asynchronous position error signal detector employing weighted accumulation for use in servo system |
US5818659A (en) | 1995-05-02 | 1998-10-06 | International Business Machines Corporation | Quadrature servo pattern disk providing asynchronous digital PES |
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 |
JPH09251735A (ja) * | 1996-03-15 | 1997-09-22 | Fujitsu Ltd | 情報記憶媒体及び情報記憶装置 |
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 |
-
1999
- 1999-03-15 US US09/268,118 patent/US6195220B1/en not_active Expired - Lifetime
- 1999-04-29 JP JP2000550105A patent/JP4357745B2/ja not_active Expired - Fee Related
- 1999-04-29 DE DE19983241T patent/DE19983241T1/de not_active Withdrawn
- 1999-04-29 CN CNB998063681A patent/CN1138271C/zh not_active Expired - Fee Related
- 1999-04-29 WO PCT/US1999/009312 patent/WO1999060571A1/en active IP Right Grant
- 1999-04-29 GB GB0025792A patent/GB2354628B/en not_active Expired - Fee Related
- 1999-04-29 KR KR1020007012867A patent/KR100629019B1/ko not_active IP Right Cessation
-
2000
- 2000-09-05 US US09/655,479 patent/US6469849B1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
GB2354628A (en) | 2001-03-28 |
GB0025792D0 (en) | 2000-12-06 |
JP2002516451A (ja) | 2002-06-04 |
WO1999060571A1 (en) | 1999-11-25 |
CN1138271C (zh) | 2004-02-11 |
GB2354628B (en) | 2002-06-12 |
JP4357745B2 (ja) | 2009-11-04 |
CN1301386A (zh) | 2001-06-27 |
US6469849B1 (en) | 2002-10-22 |
KR100629019B1 (ko) | 2006-09-26 |
KR20010043667A (ko) | 2001-05-25 |
US6195220B1 (en) | 2001-02-27 |
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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 |