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FR2256499B1 - - Google Patents

Info

Publication number
FR2256499B1
FR2256499B1 FR7443449A FR7443449A FR2256499B1 FR 2256499 B1 FR2256499 B1 FR 2256499B1 FR 7443449 A FR7443449 A FR 7443449A FR 7443449 A FR7443449 A FR 7443449A FR 2256499 B1 FR2256499 B1 FR 2256499B1
Authority
FR
France
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.)
Expired
Application number
FR7443449A
Other versions
FR2256499A1 (fr
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.)
Bull HN Information Systems Italia SpA
Bull HN Information Systems Inc
Original Assignee
Honeywell Information Systems Italia SpA
Honeywell Information Systems Inc
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 Honeywell Information Systems Italia SpA, Honeywell Information Systems Inc filed Critical Honeywell Information Systems Italia SpA
Publication of FR2256499A1 publication Critical patent/FR2256499A1/fr
Application granted granted Critical
Publication of FR2256499B1 publication Critical patent/FR2256499B1/fr
Expired 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
    • G11B5/58—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
    • G11B5/59611—Detection or processing of peak/envelop signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Moving Of The Head To Find And Align With The Track (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
FR7443449A 1974-01-02 1974-12-31 Expired FR2256499B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US430343A US3893180A (en) 1974-01-02 1974-01-02 Transducer positioning system

Publications (2)

Publication Number Publication Date
FR2256499A1 FR2256499A1 (fr) 1975-07-25
FR2256499B1 true FR2256499B1 (fr) 1978-07-13

Family

ID=23707135

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7443449A Expired FR2256499B1 (fr) 1974-01-02 1974-12-31

Country Status (6)

Country Link
US (1) US3893180A (fr)
JP (1) JPS5099709A (fr)
CA (1) CA1044804A (fr)
DE (1) DE2460841A1 (fr)
FR (1) FR2256499B1 (fr)
GB (1) GB1464231A (fr)

Families Citing this family (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4157576A (en) * 1974-08-17 1979-06-05 Basf Aktiengesellschaft Track-dependent transducer position control in magneto-dynamic storage devices, and a magnetic recording medium to which this method is applicable
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
US4030132A (en) * 1975-03-27 1977-06-14 Memorex Corporation Dual mode velocity servo control for a linear actuator motor
JPS582427B2 (ja) * 1975-10-09 1983-01-17 富士通株式会社 ジキデイスクソウチ
US4048660A (en) * 1975-12-23 1977-09-13 International Business Machines Corporation Record track following and seeking
US4092683A (en) * 1976-08-10 1978-05-30 Sperry Rand Corporation Dual-mode demodulator for movement of a servo head
US4092682A (en) * 1976-08-10 1978-05-30 Sperry Rand Corporation Cross coupled demodulator for generating a servo head position error signal
US4101942A (en) * 1976-10-15 1978-07-18 Xerox Corporation Track following servo system and track following code
US4130844A (en) * 1976-10-26 1978-12-19 Xerox Corporation Method and means for tracking magnetic tracks
US4085427A (en) * 1976-12-13 1978-04-18 Data General Corporation Transducer positioning system
GB1520350A (en) * 1976-12-22 1978-08-09 Ibm Data storage apparatus
US4164764A (en) * 1977-07-11 1979-08-14 Pericomp Corporation Magnetic head position reference system
US4149200A (en) * 1977-10-31 1979-04-10 Burroughs Corporation Transducer positioning system
US4241455A (en) * 1977-12-29 1980-12-23 Sperry Corporation Data receiving and processing circuit
US4238736A (en) * 1978-07-24 1980-12-09 Slay Frederick M Peak limiting by half waves
GB2054240B (en) * 1979-07-19 1983-06-22 Burroughs Corp Disc eccentricity measuring means
US4286296A (en) * 1979-12-31 1981-08-25 International Business Machines Corporation Transducer positioning system
US4380034A (en) * 1980-09-26 1983-04-12 Magnetic Peripherals Inc. Track centering servo pulse noise filter
EP0063935A1 (fr) * 1981-04-24 1982-11-03 Iomega Corporation Procédé et dispositif pour positionner la tête d'une unité d'entraînement de disques
US4415939A (en) * 1981-04-27 1983-11-15 Iomega Corporation Head positioning servo for disk drive
DE3120327A1 (de) * 1981-05-22 1982-12-09 Ibm Deutschland Gmbh, 7000 Stuttgart Verfahren und anordnung zum kompensieren von signaleinbruechen in von magnetischen aufzeichnungstraegern gelesenen signalen
US5115360A (en) * 1982-05-10 1992-05-19 Digital Equipment Corporation Embedded burst demodulation and tracking error generation
US5095471A (en) * 1982-05-10 1992-03-10 Digital Equipment Corporation Velocity estimator in a disk drive positioning system
US5187619A (en) * 1982-05-10 1993-02-16 Digital Equipment Corporation High speed switched 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
US5153787A (en) * 1982-05-10 1992-10-06 Digital Equipment Corporation Combination embedded and dedicated servo system including embedded servo waiting
US5109307A (en) * 1982-05-10 1992-04-28 Digital Equipment Corporation Continuous-plus-embedded servo data position control system for magnetic disk device
US5136440A (en) * 1982-05-10 1992-08-04 Digital Equipment Corporation Track identification and counting in a disk drive positioning system
US5220468A (en) * 1982-05-10 1993-06-15 Digital Equipment Corporation Disk drive with constant bandwidth automatic gain control
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
US5115359A (en) * 1982-05-10 1992-05-19 Digital Equipment Corporation Fault tolerant frame, guardband and index detection methods
US4603299A (en) * 1982-07-26 1986-07-29 Memory Technology, Inc. Constant duty cycle peak detector
JP2724996B2 (ja) * 1983-12-20 1998-03-09 パイオニア株式会社 相対位置検出装置
DE3546771C2 (fr) * 1984-04-27 1993-08-12 Pioneer Electronic Corp., Tokio/Tokyo, Jp
US4745497A (en) * 1985-08-12 1988-05-17 Fuji Electric Company Ltd. Digital head position controller with triangle wave comparison
WO1987001023A1 (fr) * 1985-08-16 1987-02-26 David Brown Moniteur electromyographique de lesion par efforts repetitifs
JPS6262487A (ja) * 1985-09-12 1987-03-19 Fuji Electric Co Ltd デイスク記憶装置の読み書きヘツドの位置決め方法
US4868678A (en) * 1986-03-28 1989-09-19 Victor Company Of Japan, Ltd. Apparatus for recording a video signal of consecutive fields on a pair of separated tracks
JPS62227282A (ja) * 1986-03-28 1987-10-06 Victor Co Of Japan Ltd 複合映像信号の駒撮り記録装置
US4878211A (en) * 1986-05-26 1989-10-31 Pioneer Electronic Corporation Method and apparatus for correcting the loop gain of a servo loop in accordance with measurements during open-loop operation
US4766508A (en) * 1986-10-02 1988-08-23 Eastman Kodak Company Burst integral detecting embedded servo disk tracking system
US5036408A (en) * 1988-05-12 1991-07-30 Digital Equipment Corporation High efficiency disk format and synchronization system
US5189571A (en) * 1990-04-30 1993-02-23 Seagate Technology, Inc. Adaptive settle time minimization for a hard disk drive
US5329409A (en) * 1991-07-24 1994-07-12 Seagate Technology, Inc. Correction of current feedback offset for disc drive servo systems
US5448430A (en) * 1993-08-05 1995-09-05 International Business Machines Corporation Track following servo demodulation
CN111007302B (zh) * 2019-12-18 2022-03-04 北京无线电测量研究所 一种非线性正负峰值检波器

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3156906A (en) * 1959-10-16 1964-11-10 Ibm Transducer positioning mechanism in a random access memory system
US3479664A (en) * 1965-12-28 1969-11-18 Data Products Corp Servo positioning system
US3534344A (en) * 1967-12-21 1970-10-13 Ibm Method and apparatus for recording and detecting information
US3593333A (en) * 1969-11-26 1971-07-13 Ibm Position detection for a track following servo system
US3691543A (en) * 1971-02-08 1972-09-12 Ibm Positioning system including servo track configuration and associated demodulator
GB1369155A (en) * 1972-01-19 1974-10-02 Int Computers Ltd Servo systems
US3818502A (en) * 1972-09-05 1974-06-18 Ibm Automatic head width correction

Also Published As

Publication number Publication date
GB1464231A (en) 1977-02-09
US3893180A (en) 1975-07-01
JPS5099709A (fr) 1975-08-07
DE2460841A1 (de) 1975-07-10
FR2256499A1 (fr) 1975-07-25
CA1044804A (fr) 1978-12-19

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Legal Events

Date Code Title Description
ST Notification of lapse