ATE110488T1 - Kopfbelastungsgeschwindigkeitssteuerung. - Google Patents

Kopfbelastungsgeschwindigkeitssteuerung.

Info

Publication number
ATE110488T1
ATE110488T1 AT89902450T AT89902450T ATE110488T1 AT E110488 T1 ATE110488 T1 AT E110488T1 AT 89902450 T AT89902450 T AT 89902450T AT 89902450 T AT89902450 T AT 89902450T AT E110488 T1 ATE110488 T1 AT E110488T1
Authority
AT
Austria
Prior art keywords
speed control
head
load speed
head load
disc
Prior art date
Application number
AT89902450T
Other languages
English (en)
Inventor
Robert F Couse
Patrick G Mercer
Original Assignee
Syquest Technology
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 Syquest Technology filed Critical Syquest Technology
Application granted granted Critical
Publication of ATE110488T1 publication Critical patent/ATE110488T1/de

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • G11B21/12—Raising and lowering; Back-spacing or forward-spacing along track; Returning to starting position otherwise than during transducing operation
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/04—Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions

Landscapes

  • Moving Of Head For Track Selection And Changing (AREA)
  • Paper (AREA)
  • Magnetic Heads (AREA)
  • Control Of Electric Motors In General (AREA)
  • Feeding And Guiding Record Carriers (AREA)
  • Vehicle Body Suspensions (AREA)
AT89902450T 1988-03-07 1989-01-25 Kopfbelastungsgeschwindigkeitssteuerung. ATE110488T1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/164,882 US4864437A (en) 1988-03-07 1988-03-07 Head loading velocity control

Publications (1)

Publication Number Publication Date
ATE110488T1 true ATE110488T1 (de) 1994-09-15

Family

ID=22596503

Family Applications (1)

Application Number Title Priority Date Filing Date
AT89902450T ATE110488T1 (de) 1988-03-07 1989-01-25 Kopfbelastungsgeschwindigkeitssteuerung.

Country Status (8)

Country Link
US (1) US4864437A (de)
EP (1) EP0403499B1 (de)
JP (1) JP2622003B2 (de)
AT (1) ATE110488T1 (de)
AU (1) AU3055489A (de)
CA (1) CA1321423C (de)
DE (1) DE68917718T2 (de)
WO (1) WO1989008916A1 (de)

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US5654840A (en) * 1994-06-30 1997-08-05 Western Digital Corporation Hard disk drive which uses the back EMF of the actuator to detect shocks
US5828522A (en) * 1994-09-13 1998-10-27 International Business Machines Corporation Velocity control of head load/unload mechanism in a disk drive using dither
US5615064A (en) * 1994-10-03 1997-03-25 International Business Machines Corporation Pulsed current velocity controlled head load method and apparatus which uses the back EMF to control the generation of head actuator driving pulses
US5545989A (en) * 1995-01-19 1996-08-13 Conner Peripherals, Inc. Non-destructive in-situ landing velocity determination of magnetic rigid disk drives using back EMF from the spindle motor during shutdown
US6078444A (en) * 1995-05-12 2000-06-20 Cirrus Logic, Inc. Read channel auxiliary high precision data conversion
US5666236A (en) * 1995-08-22 1997-09-09 Iomega Corporation Velocity control for a disk drive actuator
US5768045A (en) * 1995-12-20 1998-06-16 Western Digital Corporation Hardware velocity limit control system
US5684653A (en) * 1996-01-16 1997-11-04 Hewlett-Packard Company Method and apparatus for minimizing seek time in a disk drive by increasing power amplifier power based on power amplifier voltage head room
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KR100255207B1 (ko) * 1997-01-28 2000-05-01 윤종용 하드 디스크 드라이브의 안정된 언래치 제어 방법
JP3080363B2 (ja) * 1997-06-27 2000-08-28 インターナショナル・ビジネス・マシーンズ・コーポレ−ション ディスクドライブ装置、ロード・アンロード装置及びその制御方法
KR100268499B1 (ko) * 1997-07-18 2000-10-16 윤종용 자기디스크드라이브에서의헤드언래치제어방법
US5986830A (en) * 1997-07-30 1999-11-16 Cirrus Logic, Inc. Read/write channel write precompensation system and method using one or more delay clocks
US5990707A (en) * 1997-09-05 1999-11-23 Cirrus Logic, Inc. Method and system for sliced integration of flash analog to digital converters in read channel circuits
US6084538A (en) * 1997-09-05 2000-07-04 Cirrus Logic, Inc. Offset calibration of a flash ADC array
US5990814A (en) * 1997-09-05 1999-11-23 Cirrus Logic, Inc. Method and circuit for calibration of flash analog to digital converters
US6028727A (en) * 1997-09-05 2000-02-22 Cirrus Logic, Inc. Method and system to improve single synthesizer setting times for small frequency steps in read channel circuits
US6122130A (en) * 1997-10-27 2000-09-19 Seagate Technology, Inc. Intelligent lubricant for ramp load/unload
US5973886A (en) * 1997-11-14 1999-10-26 Castlewood Systems Adjustable head load ramp for digital video disk drive system
US6125006A (en) * 1997-11-14 2000-09-26 Castlewood Systems, Inc. Voice coil motor actuated video data cartridge release
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US6111726A (en) * 1998-04-28 2000-08-29 Imation Corp. Data storage cartridge with rotary shutter
US6600618B2 (en) 1998-09-21 2003-07-29 Stmicroelectronics, Inc. Time domain voice coil motor control circuit and method
US6078482A (en) * 1998-10-16 2000-06-20 Imation Corp. Data storage cartridge with releasable shutter assembly
JP3607513B2 (ja) 1998-11-30 2005-01-05 株式会社東芝 ヘッドロード／アンロード方式のディスク装置に適用される速度補正値キャリブレーション方法
US6700344B1 (en) 1998-12-16 2004-03-02 Stmicroelectronics Asia Pacific (Pte) Ltd. Method of controlling the speed of an arm of a disk drive
US6054833A (en) * 1999-05-10 2000-04-25 Iomega Corporation Disk drive having improved head-velocity control, and method therefor
JP2001184816A (ja) * 1999-12-24 2001-07-06 Toshiba Corp ディスク記憶装置
US6950272B1 (en) 2000-06-09 2005-09-27 Maxtor Corporation Method and apparatus for the acoustic improvement of the pulsed current method for controlling the velocity of a transducer head
US6760179B2 (en) 2000-08-09 2004-07-06 Seagate Technology Llc Adaptive pulse shaping method and apparatus for unlatching a VCM in a disc drive
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US7009806B2 (en) * 2003-02-19 2006-03-07 Matsushita Electric Industrial Co., Ltd. Accurate tracking of coil resistance
US6917486B2 (en) * 2003-07-18 2005-07-12 Matsushita Electrical Industrial Co., Ltd. Direct detection of coil resistance
US7224546B1 (en) 2004-01-31 2007-05-29 Western Digital Technologies, Inc. Disk drive employing a calibrated brake pulse to reduce acoustic noise when latching an actuator arm
US7054098B1 (en) 2004-06-01 2006-05-30 Western Digital Technologies, Inc. Disk drive employing asymmetric acceleration/deceleration pulses for acoustic noise reduction during unlatch
US7460604B2 (en) 2004-06-03 2008-12-02 Silicon Laboratories Inc. RF isolator for isolating voltage sensing and gate drivers
US7577223B2 (en) * 2004-06-03 2009-08-18 Silicon Laboratories Inc. Multiplexed RF isolator circuit
US7421028B2 (en) * 2004-06-03 2008-09-02 Silicon Laboratories Inc. Transformer isolator for digital power supply
US7738568B2 (en) 2004-06-03 2010-06-15 Silicon Laboratories Inc. Multiplexed RF isolator
US7302247B2 (en) * 2004-06-03 2007-11-27 Silicon Laboratories Inc. Spread spectrum isolator
US7447492B2 (en) 2004-06-03 2008-11-04 Silicon Laboratories Inc. On chip transformer isolator
US8049573B2 (en) 2004-06-03 2011-11-01 Silicon Laboratories Inc. Bidirectional multiplexed RF isolator
US7068463B1 (en) 2004-06-14 2006-06-27 Western Digital Technologies, Inc. Disk drive employing a velocity profile and back EMF feedback to control a voice coil motor
KR20070072627A (ko) * 2004-12-09 2007-07-04 가부시키가이샤 무라타 세이사쿠쇼 낙하검지 장치 및 자기디스크 장치
US7095579B1 (en) 2005-06-02 2006-08-22 Western Digital Technologies, Inc. Disk drive employing momentum based unload during power failure
JP2008234742A (ja) * 2007-03-19 2008-10-02 Hitachi-Lg Data Storage Inc 光ディスク装置
EP3293888B1 (de) 2016-09-13 2020-08-26 Allegro MicroSystems, LLC Signalisolator mit bidirektionaler kommunikation zwischen chips
US11115244B2 (en) 2019-09-17 2021-09-07 Allegro Microsystems, Llc Signal isolator with three state data transmission

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Publication number Priority date Publication date Assignee Title
US32075A (en) * 1861-04-16 Alexander millar
US3648263A (en) * 1970-05-11 1972-03-07 George H Kunstadt Data head actuation apparatus and circuit
JPS6023420B2 (ja) * 1978-02-16 1985-06-07 株式会社日立製作所 磁気ヘツドのロ−ド機構
US4202020A (en) * 1978-08-31 1980-05-06 International Business Machines Corporation Magnetic head load control system
JPS5651059A (en) * 1979-10-01 1981-05-08 Mitsubishi Electric Corp Flexible disc device for both side type
US4355273A (en) * 1980-09-15 1982-10-19 Xerox Corporation Servo capture system
US4491776A (en) * 1982-05-25 1985-01-01 Manhattan Engineering Company, Inc. Servo operated digital positioning control system
US4488187A (en) * 1982-06-04 1984-12-11 Syquest Technology Servo control apparatus
US4630190A (en) * 1984-02-21 1986-12-16 Syquest Technology Servo control apparatus for a disk drive
FR2573904B1 (fr) * 1984-11-29 1987-01-02 Bull Sa Procede pour deplacer un systeme mobile mu par un moteur electrique suivant une trajectoire donnee

Also Published As

Publication number Publication date
DE68917718D1 (de) 1994-09-29
EP0403499B1 (de) 1994-08-24
DE68917718T2 (de) 1995-03-02
US4864437A (en) 1989-09-05
JPH03503326A (ja) 1991-07-25
JP2622003B2 (ja) 1997-06-18
CA1321423C (en) 1993-08-17
EP0403499A1 (de) 1990-12-27
EP0403499A4 (en) 1991-04-24
AU3055489A (en) 1989-10-05
WO1989008916A1 (en) 1989-09-21

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