DE69625192D1 - Präzisionsservodemodulator - Google Patents

Präzisionsservodemodulator

Info

Publication number
DE69625192D1
DE69625192D1 DE69625192T DE69625192T DE69625192D1 DE 69625192 D1 DE69625192 D1 DE 69625192D1 DE 69625192 T DE69625192 T DE 69625192T DE 69625192 T DE69625192 T DE 69625192T DE 69625192 D1 DE69625192 D1 DE 69625192D1
Authority
DE
Germany
Prior art keywords
präzisionsservodemodulator
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.)
Expired - Lifetime
Application number
DE69625192T
Other languages
English (en)
Inventor
Melchiorre Bruccoleri
Marco Demicheli
Davide Demicheli
Giuseppe Patti
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.)
STMicroelectronics SRL
Original Assignee
STMicroelectronics SRL
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 STMicroelectronics SRL filed Critical STMicroelectronics SRL
Application granted granted Critical
Publication of DE69625192D1 publication Critical patent/DE69625192D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G11B5/59688—Servo signal format patterns or signal processing thereof, e.g. dual, tri, quad, burst signal patterns
    • 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
    • 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
    • G11B5/5534—Initialisation, calibration, e.g. cylinder "set-up"

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Moving Of The Head To Find And Align With The Track (AREA)
  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
DE69625192T 1996-08-07 1996-08-07 Präzisionsservodemodulator Expired - Lifetime DE69625192D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP96830448A EP0825589B1 (de) 1996-08-07 1996-08-07 Präzisionsservodemodulator

Publications (1)

Publication Number Publication Date
DE69625192D1 true DE69625192D1 (de) 2003-01-16

Family

ID=8225994

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69625192T Expired - Lifetime DE69625192D1 (de) 1996-08-07 1996-08-07 Präzisionsservodemodulator

Country Status (4)

Country Link
US (2) US6002542A (de)
EP (1) EP0825589B1 (de)
JP (1) JPH1069741A (de)
DE (1) DE69625192D1 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19916686A1 (de) * 1999-04-14 2000-10-19 Moeller Gmbh Eingangsschaltung für relativ hochstromige zu überwachende AC-Signale
US6628472B1 (en) 1999-10-12 2003-09-30 Seagate Technoogy Llc Method and apparatus for feedforward cancellation using a phase lock loop
US6618219B1 (en) 1999-10-12 2003-09-09 Seagate Technology Llc Method and apparatus for feedforward cancellation using a peak detector
US6388596B1 (en) * 2000-05-08 2002-05-14 Texas Instruments Incorporated Digital signal demodulation using weighted peak sample averaging
JP2002117636A (ja) * 2000-10-03 2002-04-19 Matsushita Electric Ind Co Ltd 磁気ディスク装置の制御装置、方法、記録媒体及び磁気ディスク装置の検査方法、装置
US6678110B2 (en) 2000-12-05 2004-01-13 Seagate Technology Llc Robust servo demodulation filtering method
US6992857B2 (en) * 2004-02-02 2006-01-31 Hewlett-Packard Development Company, L.P. Weighting servo signals for head positioning
US7113116B2 (en) 2005-01-26 2006-09-26 Analog Devices, Inc. Sample and hold apparatus
US8040631B2 (en) * 2009-05-18 2011-10-18 Seagate Technology Llc Servo processors that alternately control head positioning relative to sequential servo patterns
US9093971B2 (en) 2012-03-30 2015-07-28 Intel Corporation Inverter-and-switched-capacitor-based squelch detector apparatus and method
US10276198B1 (en) * 2017-01-12 2019-04-30 Marvell International Ltd. Method and apparatus for multi-channel servo demodulation

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4380034A (en) * 1980-09-26 1983-04-12 Magnetic Peripherals Inc. Track centering servo pulse noise filter
GB2090677B (en) * 1981-01-06 1984-03-28 Burroughs Corp Differential signal decoder
US4698523A (en) * 1985-11-01 1987-10-06 Advanced Micro Devices, Inc. Servo data demodulator
US4833551A (en) * 1987-02-24 1989-05-23 Konishiroku Photo Industries Co., Ltd. Dual head servo system and method for a magnetic disk
US5400201A (en) * 1993-10-25 1995-03-21 Syquest Technology, Inc. Servo burst pattern for removing offset caused by magnetic distortion and method associated therewith
US5483394A (en) * 1993-10-29 1996-01-09 Wangtek, Inc. Filtered average servo demodulator
JPH07201146A (ja) * 1993-12-28 1995-08-04 Toshiba Corp 磁気ディスク装置のヘッド位置決め制御装置とヘッド位置決め制御方法
US5483393A (en) * 1994-04-18 1996-01-09 Western Digital Corporation Disk drive having head positioning servo with improved servo read signal processing using median servo burst peak magnitudes
US5583706A (en) * 1994-11-17 1996-12-10 Cirrus Logic, Inc. Decimation DC offset control in a sampled amplitude read channel
US5801896A (en) * 1995-03-02 1998-09-01 International Business Machines Corporation Method and apparatus for servo pulse detection with high AC coupling and large pulse asymmetry
US5801895A (en) * 1996-05-28 1998-09-01 Hewlett Packard Company Disk drive servo demodulation system which suppresses noise on the position error signal
US5825318A (en) * 1996-12-19 1998-10-20 Quantum Corporation Data and servo sampling in synchronous data detection channel

Also Published As

Publication number Publication date
EP0825589B1 (de) 2002-12-04
JPH1069741A (ja) 1998-03-10
US6002542A (en) 1999-12-14
US6204990B1 (en) 2001-03-20
EP0825589A1 (de) 1998-02-25

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Legal Events

Date Code Title Description
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