FR2407544A1 - Installation et procede de positionnement d'un transducteur magnetique - Google Patents
Installation et procede de positionnement d'un transducteur magnetiqueInfo
- Publication number
- FR2407544A1 FR2407544A1 FR7821565A FR7821565A FR2407544A1 FR 2407544 A1 FR2407544 A1 FR 2407544A1 FR 7821565 A FR7821565 A FR 7821565A FR 7821565 A FR7821565 A FR 7821565A FR 2407544 A1 FR2407544 A1 FR 2407544A1
- Authority
- FR
- France
- Prior art keywords
- pulse
- bit
- recorded
- installation
- positioning method
- 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.)
- Granted
Links
Classifications
-
- 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
- G11B5/59616—Synchronisation; Clocking
-
- 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
- G11B5/5556—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 with track following after a "seek"
- G11B5/556—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 with track following after a "seek" control circuits therefor
Landscapes
- Moving Of The Head To Find And Align With The Track (AREA)
- Digital Magnetic Recording (AREA)
Abstract
A.SYSTEME D'ENREGISTREMENT MAGNETIQUE COMPORTANT DES ENREGISTREMENTS MAGNETIQUES SUR PISTES MULTIPLES, AU MOINS UNE PARTIE DE CHAQUE PISTE ETANT ENREGISTREE EN MODE DI-BIT. B.SYSTEME CARACTERISE EN CE QU'IL COMPREND UN RESEAU DE DETECTION DI-BIT FORME D'UN FILTRE DESTINE A FILTRER PRINCIPALEMENT L'IMPULSION DE DI-BIT, DETECTEE, A REJETER DES COURBES NON NORMALISEES ET UN MOYEN DE TEMPORISATION ET DE SOUSTRACTION DESTINE A RETARDER LES PARTIES DE L'IMPULSION ET A EFFECTUER LA SOMME DE L'IMPULSION INITIALE ET DE L'IMPULSION RETARDEE, AVEC RECTIFICATION CORRESPONDANTE DE POLARITE POUR CREER UN SIGNAL DE SORTIE MONOPOLAIRE REPRESENTANT CHAQUE TRANSITION DE DI-BIT, ENREGISTREE.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/847,012 US4149200A (en) | 1977-10-31 | 1977-10-31 | Transducer positioning system |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2407544A1 true FR2407544A1 (fr) | 1979-05-25 |
FR2407544B1 FR2407544B1 (fr) | 1985-11-29 |
Family
ID=25299549
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7821565A Expired FR2407544B1 (fr) | 1977-10-31 | 1978-07-20 | Installation et procede de positionnement d'un transducteur magnetique |
Country Status (7)
Country | Link |
---|---|
US (2) | US4149200A (fr) |
BR (1) | BR7806712A (fr) |
DE (1) | DE2847105A1 (fr) |
FR (1) | FR2407544B1 (fr) |
GB (1) | GB2006993B (fr) |
IN (1) | IN151510B (fr) |
MX (1) | MX145427A (fr) |
Families Citing this family (49)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4270073A (en) * | 1979-02-28 | 1981-05-26 | Persci, Inc. | Position control in disk drive system |
JPS56134368A (en) * | 1980-02-22 | 1981-10-21 | Northern Telecom Inc | Forced servo track tracing system |
US4371902A (en) * | 1980-06-30 | 1983-02-01 | International Business Machines Corporation | Disk initialization method |
US4418368A (en) * | 1981-03-31 | 1983-11-29 | Disctron, Inc. | Method and apparatus for positioning a transducer using embedded servo track encoding |
US4405956A (en) * | 1981-04-22 | 1983-09-20 | Xerox Corporation | Tracking apparatus for read/write head |
US4415939A (en) * | 1981-04-27 | 1983-11-15 | Iomega Corporation | Head positioning servo for disk drive |
US4472750A (en) * | 1981-07-02 | 1984-09-18 | Irwin Magnetic Systems, Inc. | Data record with pre-recorded transducer positioning signals, and system for utilizing same |
US4498129A (en) * | 1981-07-02 | 1985-02-05 | Irwin Magnetic Systems, Inc. | Method and apparatus for normalizing servo-positioning signals |
WO1983001531A1 (fr) * | 1981-10-22 | 1983-04-28 | Peripherals Data | Procede et dispositif de positionnement d'un transducteur utilisant un codage de servo-piste noyee et une commande par microprocesseur |
US4424543A (en) * | 1981-11-16 | 1984-01-03 | Dma Systems Corporation | Method and apparatus for recording transducer positioning information |
US4630145A (en) * | 1982-02-16 | 1986-12-16 | Drivetec, Inc. | Fine positioning apparatus for floppy disk drive |
EP0088554B1 (fr) * | 1982-02-24 | 1986-04-16 | Kabushiki Kaisha Toshiba | Méthode et système de détection de la position et dispositif de positionnement d'une tête de lecture/écriture dans l'opération de recherche sur une mémoire à disque ayant des secteurs de données et de servocommande |
US4513333A (en) * | 1982-02-24 | 1985-04-23 | Dymek Corporation | Diagnostic recording |
JPS58164055A (ja) * | 1982-03-25 | 1983-09-28 | Victor Co Of Japan Ltd | レコ−ドプレ−ヤの曲間検出装置 |
US5187619A (en) * | 1982-05-10 | 1993-02-16 | Digital Equipment Corporation | High speed switched automatic gain control |
US5220468A (en) * | 1982-05-10 | 1993-06-15 | Digital Equipment Corporation | Disk drive with constant bandwidth automatic gain control |
EP0094314B2 (fr) * | 1982-05-10 | 1993-06-02 | Digital Equipment Corporation | Système asservi de positionnement à données d'asservissement continuées et intercalées pour mémoire à disques |
US5115360A (en) * | 1982-05-10 | 1992-05-19 | Digital Equipment Corporation | Embedded burst demodulation and tracking error generation |
US5136440A (en) * | 1982-05-10 | 1992-08-04 | Digital Equipment Corporation | Track identification and counting in a disk drive positioning system |
US5202802A (en) * | 1982-05-10 | 1993-04-13 | Digital Equipment Corporation | Methods of writing and detecting dibit servo encoding |
US5115359A (en) * | 1982-05-10 | 1992-05-19 | Digital Equipment Corporation | Fault tolerant frame, guardband and index detection methods |
US5153786A (en) * | 1982-05-10 | 1992-10-06 | Digital Equipment Corporation | Extended range servo system for positioning a disk drive head over a selected track |
US5095471A (en) * | 1982-05-10 | 1992-03-10 | Digital Equipment Corporation | Velocity estimator in a disk drive positioning system |
US5099367A (en) * | 1982-05-10 | 1992-03-24 | Digital Equipment Corporation | Method of automatic gain control basis selection and method of half-track servoing |
US5109307A (en) * | 1982-05-10 | 1992-04-28 | Digital Equipment Corporation | Continuous-plus-embedded servo data position control system for magnetic disk device |
US5153787A (en) * | 1982-05-10 | 1992-10-06 | Digital Equipment Corporation | Combination embedded and dedicated servo system including embedded servo waiting |
US4516178A (en) * | 1982-09-15 | 1985-05-07 | Ampex Corporation | Cylinder crossing detection circuit for disc drive or the like |
US4556921A (en) * | 1983-06-30 | 1985-12-03 | Memorex Corporation | Method and apparatus to improve the positioning accuracy of a tracking arm |
EP0240745A3 (fr) * | 1983-08-31 | 1987-11-19 | Memorex Corporation | Technique d'asservissement pour entraíner un disque |
JPH087955B2 (ja) * | 1984-06-29 | 1996-01-29 | 株式会社東芝 | フロツピーデイスク装置 |
US4812929A (en) * | 1985-11-19 | 1989-03-14 | Rodime Plc | Head positioning mechanism for rotating disk data storage system |
US4682253A (en) * | 1986-04-23 | 1987-07-21 | Rodime Plc | Servo positioning system for disk drive system |
US4829545A (en) * | 1986-08-25 | 1989-05-09 | Guzik Technical Enterprises, Inc. | Method and apparatus for data window centering ina multifrequency data separator |
DE3706159A1 (de) * | 1987-02-26 | 1988-09-08 | Thomson Brandt Gmbh | Verfahren zur spurfindung bei einem aufzeichnungsgeraet |
JP2557896B2 (ja) * | 1987-07-31 | 1996-11-27 | 株式会社東芝 | ディスク装置 |
JP2551043B2 (ja) * | 1987-10-31 | 1996-11-06 | ソニー株式会社 | トラッキング制御装置 |
JPH01208777A (ja) * | 1988-02-03 | 1989-08-22 | Internatl Business Mach Corp <Ibm> | デイスク装置のサーボ・パターンの書込み方法 |
US5268804A (en) * | 1989-04-26 | 1993-12-07 | International Business Machines Corporation | Actuator arm controller for a storage device |
US4914725A (en) * | 1989-07-10 | 1990-04-03 | International Business Machines Corporation | Transducer positioning servo mechanisms employing digital and analog circuits |
EP0435255A1 (fr) * | 1989-12-27 | 1991-07-03 | Nec Corporation | Appareil pour disque magnétique |
EP0464992B1 (fr) * | 1990-06-29 | 1996-08-14 | Quantum Corporation | Recherche de pistes adaptatives pour unité de disques |
US5331615A (en) * | 1991-05-11 | 1994-07-19 | Matsushita Electric Industrial Co., Ltd. | Tracking control apparatus for an optical disk device |
US5381279A (en) * | 1993-10-13 | 1995-01-10 | Maxtor Corporation | Disk drive system with adjustable spindle and actuator power to improve seek and access performance |
JPH07169202A (ja) * | 1993-12-13 | 1995-07-04 | Nec Ibaraki Ltd | 磁気ディスク装置 |
US6480353B1 (en) * | 1999-02-22 | 2002-11-12 | Seagate Technology Llc | Fixed disc drive cartridge and playback device |
US6594106B1 (en) * | 1999-10-29 | 2003-07-15 | International Business Machines Corporation | Adaptive servo estimator and compensator for coil and carriage deformation in voice coil motor driven hard disk drive |
US6281652B1 (en) * | 2000-03-24 | 2001-08-28 | Western Digital Corporation | Method of using two low-resolution DACS for converting high-resolution digital demands into analog output signals that monotonically drive an actuator motor in a disk drive |
JP3962527B2 (ja) * | 2000-03-30 | 2007-08-22 | 株式会社東芝 | フィードバック制御装置及び制御方法と、磁気ディスク装置及びその制御方法 |
US7575820B2 (en) * | 2004-03-16 | 2009-08-18 | Hitachi Global Storage Technologies Netherlands B.V. | System and method for controlling write to minimize ATI and squeeze effects |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1603482A (fr) * | 1967-12-21 | 1971-04-19 | ||
FR2256499A1 (fr) * | 1974-01-02 | 1975-07-25 | Honeywell Inf Systems | |
DE2645620A1 (de) * | 1975-10-09 | 1977-04-14 | Fujitsu Ltd | Magnetplattenspeicher-vorrichtung |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3691543A (en) * | 1971-02-08 | 1972-09-12 | Ibm | Positioning system including servo track configuration and associated demodulator |
US3860861A (en) * | 1971-12-27 | 1975-01-14 | Potter Instrument Co Inc | Disk drive head positioning servo including temperature responsive safety means |
US3812533A (en) * | 1972-12-22 | 1974-05-21 | Vermont Res Corp | Information storage unit transducer positioning system |
US3959820A (en) * | 1974-09-16 | 1976-05-25 | Honeywell Information Systems, Inc. | System for increasing the number of data tracks in a magnetic recording system |
US3994016A (en) * | 1975-03-31 | 1976-11-23 | Honeywell Information Systems, Inc. | Head positioning servo system for disk drives |
US4027338A (en) * | 1975-04-28 | 1977-05-31 | Burroughs Corporation | Transducer positioning system for providing coarse positioning |
US4032984A (en) * | 1975-04-28 | 1977-06-28 | Burroughs Corporation | Transducer positioning system for providing both coarse and fine positioning |
GB1503972A (en) * | 1975-07-24 | 1978-03-15 | Ibm | Data storage apparatus |
US4027388A (en) * | 1975-10-14 | 1977-06-07 | The Fletcher-Terry Company | Scraper |
US4075667A (en) * | 1975-12-17 | 1978-02-21 | Sperry Rand Corporation | Method and apparatus for aligning read/write heads in a disc recorder |
-
1977
- 1977-10-31 US US05/847,012 patent/US4149200A/en not_active Expired - Lifetime
-
1978
- 1978-01-03 US US05/866,413 patent/US4149201A/en not_active Expired - Lifetime
- 1978-06-23 GB GB7827807A patent/GB2006993B/en not_active Expired
- 1978-07-20 FR FR7821565A patent/FR2407544B1/fr not_active Expired
- 1978-10-10 BR BR7806712A patent/BR7806712A/pt unknown
- 1978-10-17 MX MX175251A patent/MX145427A/es unknown
- 1978-10-30 DE DE19782847105 patent/DE2847105A1/de active Granted
- 1978-12-22 IN IN1364/CAL/78A patent/IN151510B/en unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1603482A (fr) * | 1967-12-21 | 1971-04-19 | ||
FR2256499A1 (fr) * | 1974-01-02 | 1975-07-25 | Honeywell Inf Systems | |
DE2645620A1 (de) * | 1975-10-09 | 1977-04-14 | Fujitsu Ltd | Magnetplattenspeicher-vorrichtung |
Non-Patent Citations (2)
Title |
---|
EXBK/73 * |
EXBK/75 * |
Also Published As
Publication number | Publication date |
---|---|
US4149201A (en) | 1979-04-10 |
GB2006993A (en) | 1979-05-10 |
DE2847105C2 (fr) | 1990-05-31 |
DE2847105A1 (de) | 1979-08-30 |
IN151510B (fr) | 1983-05-07 |
US4149200A (en) | 1979-04-10 |
BR7806712A (pt) | 1979-05-15 |
MX145427A (es) | 1982-02-08 |
GB2006993B (en) | 1982-02-10 |
FR2407544B1 (fr) | 1985-11-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
CD | Change of name or company name | ||
TP | Transmission of property | ||
ST | Notification of lapse |