BE803890A - Servo-systeme suiveur de pistes perfectionne notamment pour memoire a disques magnetiques - Google Patents

Servo-systeme suiveur de pistes perfectionne notamment pour memoire a disques magnetiques

Info

Publication number
BE803890A
BE803890A BE134820A BE134820A BE803890A BE 803890 A BE803890 A BE 803890A BE 134820 A BE134820 A BE 134820A BE 134820 A BE134820 A BE 134820A BE 803890 A BE803890 A BE 803890A
Authority
BE
Belgium
Prior art keywords
perfected
magnetic disc
track following
system especially
disc memory
Prior art date
Application number
BE134820A
Other languages
English (en)
French (fr)
Inventor
J Hui-Ning Chien
R K Oswald
Original Assignee
Ibm
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 Ibm filed Critical Ibm
Publication of BE803890A publication Critical patent/BE803890A/xx

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D3/00—Control of position or direction
    • G05D3/12—Control of position or direction using feedback
    • G05D3/14—Control of position or direction using feedback using an analogue comparing device
    • G05D3/1427—Control of position or direction using feedback using an analogue comparing device with non-linear amplifier chain
BE134820A 1972-09-05 1973-08-22 Servo-systeme suiveur de pistes perfectionne notamment pour memoire a disques magnetiques BE803890A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00286000A US3818502A (en) 1972-09-05 1972-09-05 Automatic head width correction

Publications (1)

Publication Number Publication Date
BE803890A true BE803890A (fr) 1973-12-17

Family

ID=23096616

Family Applications (1)

Application Number Title Priority Date Filing Date
BE134820A BE803890A (fr) 1972-09-05 1973-08-22 Servo-systeme suiveur de pistes perfectionne notamment pour memoire a disques magnetiques

Country Status (12)

Country Link
US (1) US3818502A (xx)
JP (1) JPS5148054B2 (xx)
AR (1) AR205155A1 (xx)
BE (1) BE803890A (xx)
BR (1) BR7306840D0 (xx)
CA (1) CA1003103A (xx)
CH (1) CH556084A (xx)
DE (1) DE2343002A1 (xx)
ES (1) ES417723A1 (xx)
GB (1) GB1387253A (xx)
IT (1) IT991353B (xx)
NL (1) NL169385C (xx)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3893180A (en) * 1974-01-02 1975-07-01 Honeywell Inf Systems Transducer positioning system
US4092682A (en) * 1976-08-10 1978-05-30 Sperry Rand Corporation Cross coupled demodulator for generating a servo head position error signal
US4092683A (en) * 1976-08-10 1978-05-30 Sperry Rand Corporation Dual-mode demodulator for movement of a servo head
US4173773A (en) * 1976-12-23 1979-11-06 Olympus Optical Co., Ltd. Tape end alarm for tape recorder
JPS5921104B2 (ja) * 1977-03-08 1984-05-17 日本ビクター株式会社 情報記録媒体再生装置におけるトラッキングサ−ボ装置
US4270073A (en) * 1979-02-28 1981-05-26 Persci, Inc. Position control in disk drive system
JPS6230218Y2 (xx) * 1980-09-09 1987-08-03
US4415939A (en) * 1981-04-27 1983-11-15 Iomega Corporation Head positioning servo for disk drive
US4498129A (en) * 1981-07-02 1985-02-05 Irwin Magnetic Systems, Inc. Method and apparatus for normalizing servo-positioning signals
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
US5115360A (en) * 1982-05-10 1992-05-19 Digital Equipment Corporation Embedded burst demodulation and tracking error generation
US5115359A (en) * 1982-05-10 1992-05-19 Digital Equipment Corporation Fault tolerant frame, guardband and index detection methods
US5109307A (en) * 1982-05-10 1992-04-28 Digital Equipment Corporation Continuous-plus-embedded servo data position control system for magnetic disk device
US5220468A (en) * 1982-05-10 1993-06-15 Digital Equipment Corporation Disk drive with constant bandwidth automatic gain control
US5202802A (en) * 1982-05-10 1993-04-13 Digital Equipment Corporation Methods of writing and detecting dibit servo encoding
US5099367A (en) * 1982-05-10 1992-03-24 Digital Equipment Corporation Method of automatic gain control basis selection and method of half-track servoing
US5187619A (en) * 1982-05-10 1993-02-16 Digital Equipment Corporation High speed switched automatic gain control
US5153787A (en) * 1982-05-10 1992-10-06 Digital Equipment Corporation Combination embedded and dedicated servo system including embedded servo waiting
US5136440A (en) * 1982-05-10 1992-08-04 Digital Equipment Corporation Track identification and counting in a disk drive positioning system
US5095471A (en) * 1982-05-10 1992-03-10 Digital Equipment Corporation Velocity estimator in a disk drive positioning system
DE3275670D1 (en) * 1982-06-18 1987-04-16 Ibm Head positioning system with automatic gain control
US4551776A (en) * 1982-12-20 1985-11-05 International Business Machines Corporation Automatic reference adjustment for position error signal on disk file servo system
JPH056575Y2 (xx) * 1986-04-18 1993-02-19
US5034746A (en) * 1988-09-21 1991-07-23 International Business Machines Corporation Analog-to-digital converter for computer disk file servo position error signal
JP2004295985A (ja) * 2003-03-26 2004-10-21 Hitachi Ltd データ記録開始タイミングの補償方法及びこれを用いた磁気ディスク装置
US20060044658A1 (en) * 2004-08-24 2006-03-02 Yiping Ma Detection of fly height change in a disk drive

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3263031A (en) * 1962-05-29 1966-07-26 Sperry Rand Corp High-low frequency homing
US3593333A (en) * 1969-11-26 1971-07-13 Ibm Position detection for a track following servo system

Also Published As

Publication number Publication date
CA1003103A (en) 1977-01-04
JPS5148054B2 (xx) 1976-12-18
IT991353B (it) 1975-07-30
BR7306840D0 (pt) 1974-07-25
CH556084A (de) 1974-11-15
JPS4966115A (xx) 1974-06-26
DE2343002A1 (de) 1974-03-28
AR205155A1 (es) 1976-04-12
NL169385B (nl) 1982-02-01
ES417723A1 (es) 1976-02-01
GB1387253A (en) 1975-03-12
US3818502A (en) 1974-06-18
NL7311541A (xx) 1974-03-07
NL169385C (nl) 1982-07-01

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: INTERNATIONAL BUSINESS MACHINES CORP.

Effective date: 19850831