BR7806712A - Sistema de gravacao magnetica - Google Patents

Sistema de gravacao magnetica

Info

Publication number
BR7806712A
BR7806712A BR7806712A BR7806712A BR7806712A BR 7806712 A BR7806712 A BR 7806712A BR 7806712 A BR7806712 A BR 7806712A BR 7806712 A BR7806712 A BR 7806712A BR 7806712 A BR7806712 A BR 7806712A
Authority
BR
Brazil
Prior art keywords
magnetic recording
recording system
magnetic
recording
Prior art date
Application number
BR7806712A
Other languages
English (en)
Inventor
D Card
Original Assignee
Burroughs 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 Burroughs Corp filed Critical Burroughs Corp
Publication of BR7806712A publication Critical patent/BR7806712A/pt

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
BR7806712A 1977-10-31 1978-10-10 Sistema de gravacao magnetica BR7806712A (pt)

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 (1)

Publication Number Publication Date
BR7806712A true BR7806712A (pt) 1979-05-15

Family

ID=25299549

Family Applications (1)

Application Number Title Priority Date Filing Date
BR7806712A BR7806712A (pt) 1977-10-31 1978-10-10 Sistema de gravacao magnetica

Country Status (7)

Country Link
US (2) US4149200A (pt)
BR (1) BR7806712A (pt)
DE (1) DE2847105A1 (pt)
FR (1) FR2407544B1 (pt)
GB (1) GB2006993B (pt)
IN (1) IN151510B (pt)
MX (1) MX145427A (pt)

Families Citing this family (49)

* Cited by examiner, † Cited by third party
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 (en) * 1981-10-22 1983-04-28 Peripherals Data Method and apparatus for positioning a transducer using embedded servo track encoding and microprocessor control
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 (en) * 1982-02-24 1986-04-16 Kabushiki Kaisha Toshiba Method and system for detecting the position of and apparatus for positioning a read-write head in seek operation on a disk memory having data and servo sectors
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 (en) * 1982-05-10 1993-06-02 Digital Equipment Corporation Continuous-plus-embedded servo data position control system for magnetic disk device
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 (en) * 1983-08-31 1987-11-19 Memorex Corporation Disk drive servo techniques
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 (en) * 1989-12-27 1991-07-03 Nec Corporation Magnetic disk apparatus
EP0464992B1 (en) * 1990-06-29 1996-08-14 Quantum Corporation Adaptive track seeking for disc drives
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

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3534344A (en) * 1967-12-21 1970-10-13 Ibm Method and apparatus for recording and detecting information
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
US3893180A (en) * 1974-01-02 1975-07-01 Honeywell Inf Systems 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
JPS582427B2 (ja) * 1975-10-09 1983-01-17 富士通株式会社 ジキデイスクソウチ
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

Also Published As

Publication number Publication date
US4149201A (en) 1979-04-10
FR2407544A1 (fr) 1979-05-25
GB2006993A (en) 1979-05-10
DE2847105C2 (pt) 1990-05-31
DE2847105A1 (de) 1979-08-30
IN151510B (pt) 1983-05-07
US4149200A (en) 1979-04-10
MX145427A (es) 1982-02-08
GB2006993B (en) 1982-02-10
FR2407544B1 (fr) 1985-11-29

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