BR9403557A - Método e aparelho de servomecanismo por modulação de fase em arquivo de disco e dispositivo de armazenamento de acesso direto que o utiliza - Google Patents
Método e aparelho de servomecanismo por modulação de fase em arquivo de disco e dispositivo de armazenamento de acesso direto que o utilizaInfo
- Publication number
- BR9403557A BR9403557A BR9403557A BR9403557A BR9403557A BR 9403557 A BR9403557 A BR 9403557A BR 9403557 A BR9403557 A BR 9403557A BR 9403557 A BR9403557 A BR 9403557A BR 9403557 A BR9403557 A BR 9403557A
- Authority
- BR
- Brazil
- Prior art keywords
- disk
- servo
- disk file
- servomechanism
- phase modulation
- Prior art date
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
- G11B20/16—Digital recording or reproducing using non self-clocking codes, i.e. the clock signals are either recorded in a separate clocking track or in a combination of several information tracks
-
- 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
- G11B5/59622—Gain control; Filters
-
- 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
- G11B5/59683—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 for magnetoresistive heads
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Moving Of The Head To Find And Align With The Track (AREA)
- Control Of Electric Motors In General (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Radar Systems Or Details Thereof (AREA)
- Automatic Tape Cassette Changers (AREA)
- Control Of Position Or Direction (AREA)
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12595993A | 1993-09-23 | 1993-09-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
BR9403557A true BR9403557A (pt) | 1995-06-20 |
Family
ID=22422253
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR9403557A BR9403557A (pt) | 1993-09-23 | 1994-09-14 | Método e aparelho de servomecanismo por modulação de fase em arquivo de disco e dispositivo de armazenamento de acesso direto que o utiliza |
Country Status (12)
Country | Link |
---|---|
US (1) | US6426844B1 (pt) |
EP (1) | EP0645764B1 (pt) |
JP (1) | JPH07169032A (pt) |
KR (1) | KR100191903B1 (pt) |
CN (1) | CN1064168C (pt) |
AT (1) | ATE197852T1 (pt) |
BR (1) | BR9403557A (pt) |
CA (1) | CA2127971C (pt) |
DE (1) | DE69426345T2 (pt) |
ES (1) | ES2152972T3 (pt) |
MY (1) | MY113278A (pt) |
SG (1) | SG47385A1 (pt) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2635942B2 (ja) * | 1994-02-10 | 1997-07-30 | インターナショナル・ビジネス・マシーンズ・コーポレイション | 直接アクセス記憶装置のサーボ位置決めの方法及び装置 |
JP3670440B2 (ja) * | 1997-05-20 | 2005-07-13 | 富士通株式会社 | ディスク上の位置検出方法及びディスク装置並びにディスク |
US6961203B1 (en) * | 2001-03-06 | 2005-11-01 | Maxtor Corporation | Hybrid printed servo patterns for magnetic media and hard disk systems implementing same |
JP2002373411A (ja) * | 2001-06-15 | 2002-12-26 | Fuji Photo Film Co Ltd | 磁気記録媒体およびその駆動装置 |
JP4148951B2 (ja) | 2005-01-12 | 2008-09-10 | 株式会社東芝 | 磁気記録再生装置 |
JP2006221773A (ja) * | 2005-02-14 | 2006-08-24 | Fuji Photo Film Co Ltd | 円盤状磁気記録媒体 |
US7209314B2 (en) * | 2005-06-09 | 2007-04-24 | Hitachi Global Storage Technologies Netherlands B.V. | Disk drive with phase-quadrature servo pattern and demodulated position error signal insensitive to timing and phase-misalignment errors |
KR100771881B1 (ko) * | 2006-08-23 | 2007-11-01 | 삼성전자주식회사 | 디스크 회전 슬립에 따른 데이터 섹터 위상 보정 방법 및이를 이용한 디스크 드라이브 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5693119A (en) * | 1979-12-25 | 1981-07-28 | Nec Corp | Servo system for magnetic disk device |
JPS56145568A (en) * | 1980-04-15 | 1981-11-12 | Mitsubishi Electric Corp | Head positioning system |
US4549232A (en) * | 1983-06-27 | 1985-10-22 | International Business Machines Corporation | Phase modulated servo system |
JPS60129708A (ja) | 1983-12-16 | 1985-07-11 | Matsushita Electric Ind Co Ltd | 偏光板 |
US4598327A (en) * | 1985-06-28 | 1986-07-01 | International Business Machines Corporation | Servo control system using servo pattern time of flight for read/write head positioning in a magnetic recording system |
JPS62175924A (ja) * | 1986-01-28 | 1987-08-01 | Fujitsu Ltd | オフトラツク補償方式 |
JPS6398820A (ja) * | 1986-10-15 | 1988-04-30 | Sony Corp | 磁気デイスクの記録方式 |
US5119248A (en) | 1987-10-30 | 1992-06-02 | Brier Technology, Inc. | Method of recording servo signals |
JPH01220101A (ja) | 1988-02-29 | 1989-09-01 | Hitachi Maxell Ltd | 移動マルチトラツクヘツド型情報記録装置 |
US5055951A (en) | 1989-03-10 | 1991-10-08 | Irwin Magnetic Systems, Inc. | Method and apparatus for servo-positioning movable transducer heads |
US5185681A (en) | 1990-09-28 | 1993-02-09 | Seagate | Thermal offset compensation for high density disk drives |
JPH04252415A (ja) * | 1991-01-28 | 1992-09-08 | Matsushita Electric Ind Co Ltd | 磁気ディスクおよび磁気ディスク装置 |
JP3082174B2 (ja) * | 1991-04-04 | 2000-08-28 | ソニー株式会社 | 磁気ディスクおよびその駆動装置 |
JPH05242435A (ja) * | 1992-02-27 | 1993-09-21 | Hitachi Ltd | 磁気ディスク装置およびヘッド |
-
1994
- 1994-07-13 CA CA002127971A patent/CA2127971C/en not_active Expired - Fee Related
- 1994-08-29 MY MYPI94002268A patent/MY113278A/en unknown
- 1994-08-30 KR KR1019940021533A patent/KR100191903B1/ko not_active IP Right Cessation
- 1994-08-30 CN CN94115592A patent/CN1064168C/zh not_active Expired - Fee Related
- 1994-08-31 JP JP6206191A patent/JPH07169032A/ja active Pending
- 1994-09-06 DE DE69426345T patent/DE69426345T2/de not_active Expired - Fee Related
- 1994-09-06 AT AT94480084T patent/ATE197852T1/de not_active IP Right Cessation
- 1994-09-06 ES ES94480084T patent/ES2152972T3/es not_active Expired - Lifetime
- 1994-09-06 SG SG1996000355A patent/SG47385A1/en unknown
- 1994-09-06 EP EP94480084A patent/EP0645764B1/en not_active Expired - Lifetime
- 1994-09-14 BR BR9403557A patent/BR9403557A/pt not_active IP Right Cessation
-
1995
- 1995-09-11 US US08/526,197 patent/US6426844B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH07169032A (ja) | 1995-07-04 |
EP0645764A3 (en) | 1996-09-11 |
ATE197852T1 (de) | 2000-12-15 |
SG47385A1 (en) | 1998-04-17 |
KR100191903B1 (ko) | 1999-06-15 |
EP0645764A2 (en) | 1995-03-29 |
MY113278A (en) | 2002-01-31 |
CN1110824A (zh) | 1995-10-25 |
DE69426345T2 (de) | 2001-05-17 |
DE69426345D1 (de) | 2001-01-04 |
CN1064168C (zh) | 2001-04-04 |
US6426844B1 (en) | 2002-07-30 |
KR950009677A (ko) | 1995-04-24 |
ES2152972T3 (es) | 2001-02-16 |
EP0645764B1 (en) | 2000-11-29 |
CA2127971A1 (en) | 1995-03-24 |
CA2127971C (en) | 1999-01-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EG | Technical examination (opinion): publication of technical examination (opinion) | ||
ND | Extension of time allowed | ||
FF | Decision: intention to grant | ||
FD5 | Application fees: dismissal - article 86 of industrial property law | ||
NF | Application restored | ||
FG9A | Patent or certificate of addition granted | ||
B25A | Requested transfer of rights approved |
Free format text: HITACHI GLOBAL STORAGE TECHNOLOGIES NETHERLANDS B.V. (NL) |
|
B21A | Patent or certificate of addition expired [chapter 21.1 patent gazette] |
Free format text: PATENTE EXTINTA EM 14/09/2014 |