FR2387489A1 - Circuit d'acces aux pistes d'un fichier sur disques, muni d'un filtre commutable - Google Patents

Circuit d'acces aux pistes d'un fichier sur disques, muni d'un filtre commutable

Info

Publication number
FR2387489A1
FR2387489A1 FR7807532A FR7807532A FR2387489A1 FR 2387489 A1 FR2387489 A1 FR 2387489A1 FR 7807532 A FR7807532 A FR 7807532A FR 7807532 A FR7807532 A FR 7807532A FR 2387489 A1 FR2387489 A1 FR 2387489A1
Authority
FR
France
Prior art keywords
tracks
circuit
transducer
discs
file
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
Application number
FR7807532A
Other languages
English (en)
Other versions
FR2387489B1 (fr
Inventor
Dewey E Brownback
Calvin S Nomura
Dennis P Sheehan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Business Machines Corp
Original Assignee
International Business Machines 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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of FR2387489A1 publication Critical patent/FR2387489A1/fr
Application granted granted Critical
Publication of FR2387489B1 publication Critical patent/FR2387489B1/fr
Granted legal-status Critical Current

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
    • G11B5/54—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
    • G11B5/5526—Control therefor; circuits, track configurations or relative disposition of servo-information transducers and servo-information tracks for control thereof
    • G11B5/553—Details
    • G11B5/5547—"Seek" control and circuits therefor

Landscapes

  • Moving Of Head For Track Selection And Changing (AREA)
  • Control Of Velocity Or Acceleration (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
  • Moving Of The Head To Find And Align With The Track (AREA)

Abstract

Circuit de commande du déplacement d'un transducteur pour l'accès aux pistes d'un disque. Le transducteur 7 est couplé à un circuit indicateur de vitesse par l'intermédiaire d'un circuit de filtrage F. 310 dont la bande passante est large lorsque le transducteur traverse les pistes à grande vitesse et devient plus étroite lorsque le transducteur approche de la piste cible. De ce fait, le circuit indicateur de vitesse ne souffre pas du bruit mécanique et électrique à haute fréquence engendré par le système fonctionnant à vitesse réduite. Circuit utilisable notamment dans les mémoires à disques des systèmes de traitement de données.
FR7807532A 1977-04-12 1978-03-07 Circuit d'acces aux pistes d'un fichier sur disques, muni d'un filtre commutable Granted FR2387489A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/786,917 US4096534A (en) 1977-04-12 1977-04-12 Track accessing circuitry for a disk file with switchable filter

Publications (2)

Publication Number Publication Date
FR2387489A1 true FR2387489A1 (fr) 1978-11-10
FR2387489B1 FR2387489B1 (fr) 1980-01-04

Family

ID=25139942

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7807532A Granted FR2387489A1 (fr) 1977-04-12 1978-03-07 Circuit d'acces aux pistes d'un fichier sur disques, muni d'un filtre commutable

Country Status (4)

Country Link
US (1) US4096534A (fr)
JP (1) JPS53126906A (fr)
FR (1) FR2387489A1 (fr)
GB (1) GB1591557A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2459531A1 (fr) * 1979-06-15 1981-01-09 Magnetic Peripherals Inc Circuit generateur de fonctions temporelles optimales

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5564661A (en) * 1978-11-08 1980-05-15 Toshiba Corp Self-compensator for magnetic disk memory unit
JPS5564662A (en) * 1978-11-08 1980-05-15 Toshiba Corp Self-compensator for magnetic disk memory unit
US4272793A (en) * 1979-06-04 1981-06-09 Texas Instruments Incorporated System and method for positioning a magnetic head transducer on a flexible storage media
JPS5755568A (en) * 1980-09-22 1982-04-02 Matsushita Electric Ind Co Ltd Recording and reproducing device
USRE32075E (en) * 1980-09-24 1986-01-28 Quantum Corporation Data transducer position control system for rotating disk data storage equipment
US4660106A (en) * 1980-09-24 1987-04-21 Quantum Corporation Data transducer position control system for rotating disk data storage equipment
US4396959A (en) * 1980-09-24 1983-08-02 Quantum Corporation Data transducer position control system for rotating disk data storage equipment
US4383209A (en) * 1980-10-15 1983-05-10 Minnesota Mining And Manufacturing Company Control system for transducer positioning motor
JPS59107462A (ja) * 1982-12-09 1984-06-21 Mitsubishi Electric Corp 記憶装置
JPS59107463A (ja) * 1982-12-09 1984-06-21 Mitsubishi Electric Corp 記憶装置
JP2644720B2 (ja) * 1985-02-25 1997-08-25 株式会社日立製作所 トラック引込み方法
JP2508477B2 (ja) * 1987-02-02 1996-06-19 ソニー株式会社 デイスク装置
US4878136A (en) * 1988-09-14 1989-10-31 Miniscribe Corporation Track crossing detector
US5177719A (en) * 1988-10-05 1993-01-05 Matsushita Electric Industrial Co., Ltd. Data track accessing apparatus
JP2980545B2 (ja) * 1995-09-25 1999-11-22 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 デイスク装置およびデイスク装置におけるヘッド位置制御方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2096071A5 (fr) * 1970-06-08 1972-02-11 Information Storage
FR2125852A5 (fr) * 1971-02-15 1972-09-29 Ibm
FR2311374A1 (fr) * 1975-05-15 1976-12-10 Ibm Milieu mobile d'emmagasinage de donnees et dispositif de memoire utilisant un tel milieu
FR2319179A1 (fr) * 1975-07-24 1977-02-18 Ibm Memoire a disques comportant un systeme d'asservissement de position

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL268420A (fr) * 1960-08-24
NL268455A (fr) * 1960-08-26
US3399391A (en) * 1964-06-10 1968-08-27 Sperry Rand Corp Holding circuit for servo mechanism
US3699555A (en) * 1970-10-23 1972-10-17 Zerox Corp Apparatus for rapid action displacement control
US3691543A (en) * 1971-02-08 1972-09-12 Ibm Positioning system including servo track configuration and associated demodulator
US3789378A (en) * 1971-05-24 1974-01-29 Olivetti & Co Spa Transducer positioning mechanism
US3696354A (en) * 1971-11-19 1972-10-03 Gaston Albert Palombo Position control system
GB1369155A (en) * 1972-01-19 1974-10-02 Int Computers Ltd Servo systems
GB1396834A (en) * 1973-01-31 1975-06-04 Ibm Data storage apparatus
US3820712A (en) * 1973-03-12 1974-06-28 Ibm Electronic tachometer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2096071A5 (fr) * 1970-06-08 1972-02-11 Information Storage
FR2125852A5 (fr) * 1971-02-15 1972-09-29 Ibm
FR2311374A1 (fr) * 1975-05-15 1976-12-10 Ibm Milieu mobile d'emmagasinage de donnees et dispositif de memoire utilisant un tel milieu
FR2319179A1 (fr) * 1975-07-24 1977-02-18 Ibm Memoire a disques comportant un systeme d'asservissement de position

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NV700/75 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2459531A1 (fr) * 1979-06-15 1981-01-09 Magnetic Peripherals Inc Circuit generateur de fonctions temporelles optimales

Also Published As

Publication number Publication date
FR2387489B1 (fr) 1980-01-04
GB1591557A (en) 1981-06-24
US4096534A (en) 1978-06-20
JPS5737945B2 (fr) 1982-08-12
JPS53126906A (en) 1978-11-06

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Legal Events

Date Code Title Description
ST Notification of lapse