DE69516914D1 - Dynamisch programmierbarer schreibstrom und lese-vorstrom für einen magnetoresistiven kopf - Google Patents

Dynamisch programmierbarer schreibstrom und lese-vorstrom für einen magnetoresistiven kopf

Info

Publication number
DE69516914D1
DE69516914D1 DE69516914T DE69516914T DE69516914D1 DE 69516914 D1 DE69516914 D1 DE 69516914D1 DE 69516914 T DE69516914 T DE 69516914T DE 69516914 T DE69516914 T DE 69516914T DE 69516914 D1 DE69516914 D1 DE 69516914D1
Authority
DE
Germany
Prior art keywords
current
magnetoresistive head
dynamically programmable
read pre
programmable write
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 - Fee Related
Application number
DE69516914T
Other languages
English (en)
Other versions
DE69516914T2 (de
Inventor
W Flinsbaugh
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.)
Seagate Technology LLC
Original Assignee
Seagate Technology LLC
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 Seagate Technology LLC filed Critical Seagate Technology LLC
Application granted granted Critical
Publication of DE69516914D1 publication Critical patent/DE69516914D1/de
Publication of DE69516914T2 publication Critical patent/DE69516914T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • G11B5/027—Analogue recording
    • G11B5/03—Biasing
    • 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
    • G11B5/012—Recording on, or reproducing or erasing from, magnetic disks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y10/00—Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y25/00—Nanomagnetism, e.g. magnetoimpedance, anisotropic magnetoresistance, giant magnetoresistance or tunneling magnetoresistance
    • 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
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • 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
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • G11B5/027—Analogue recording
    • G11B5/035—Equalising
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B15/026—Control of operating function, e.g. switching from recording to reproducing by using processor, e.g. microcomputer
    • 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
    • G11B2005/0002—Special dispositions or recording techniques
    • G11B2005/0005—Arrangements, methods or circuits
    • G11B2005/001—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure
    • G11B2005/0013—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure of transducers, e.g. linearisation, equalisation
    • G11B2005/0016—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure of transducers, e.g. linearisation, equalisation of magnetoresistive transducers
    • G11B2005/0018—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure of transducers, e.g. linearisation, equalisation of magnetoresistive transducers by current biasing control or regulation
    • 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
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
    • G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
    • G11B2005/3996—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects large or giant magnetoresistive effects [GMR], e.g. as generated in spin-valve [SV] devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Nanotechnology (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Digital Magnetic Recording (AREA)
DE69516914T 1995-09-06 1995-12-28 Dynamisch programmierbarer schreibstrom und lese-vorstrom für einen magnetoresistiven kopf Expired - Fee Related DE69516914T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US331695P 1995-09-06 1995-09-06
PCT/US1995/017028 WO1997009714A1 (en) 1995-09-06 1995-12-28 Dynamically programmable magneto-resistive head write and read bias currents

Publications (2)

Publication Number Publication Date
DE69516914D1 true DE69516914D1 (de) 2000-06-15
DE69516914T2 DE69516914T2 (de) 2000-10-05

Family

ID=21705223

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69516914T Expired - Fee Related DE69516914T2 (de) 1995-09-06 1995-12-28 Dynamisch programmierbarer schreibstrom und lese-vorstrom für einen magnetoresistiven kopf

Country Status (6)

Country Link
US (1) US6288863B1 (de)
EP (1) EP0878002B1 (de)
JP (1) JPH11512210A (de)
KR (1) KR100370463B1 (de)
DE (1) DE69516914T2 (de)
WO (1) WO1997009714A1 (de)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3001466B2 (ja) * 1997-06-27 2000-01-24 日本電気アイシーマイコンシステム株式会社 磁気記録装置の駆動回路
GB2335068A (en) * 1998-03-07 1999-09-08 Martin John Brennan Bias signals
JP2000195023A (ja) * 1998-12-25 2000-07-14 Toshiba Corp ヘッドサスペンションアセンブリ及び同アセンブリを搭載した磁気ディスク装置
US6765736B2 (en) * 2001-06-29 2004-07-20 Seagate Technology Llc Write-safe condition verification apparatus and method for the write element in a disc drive
EP1333427A3 (de) * 2002-01-31 2008-04-30 Texas Instruments Incorporated Schaltung zum Lesen von differentialen Daten einer Platte mittels Spannungsanlegen zur Vorspannung eines Lesekopfes
US6847501B2 (en) * 2002-11-06 2005-01-25 International Business Machines Corporation Method and apparatus for providing matched differential MR biasing and pre-amplification
US7804657B1 (en) 2007-06-11 2010-09-28 Western Digital Technologies, Inc. Setting an operating bias current for a magnetoresistive head using ratio of target voltage and measured voltage
US7872824B1 (en) 2007-06-11 2011-01-18 Western Digital (Fremont), Llc Setting an operating bias current for a magnetoresistive head by computing a target operating voltage
US7760458B1 (en) 2008-08-12 2010-07-20 Western Digital Technologies, Inc. Disk drive adjusting head bias during servo synchronization to compensate for over/under sensitivity
US9218822B1 (en) * 2015-05-13 2015-12-22 HGST Netherlands B.V. Disk drive with preamplifier with isolation for multiple readers in a slider with a common return signal
US10056132B1 (en) 2016-02-16 2018-08-21 Seagate Technology Llc Assignable registers on a preamp chip
US9741385B1 (en) 2016-02-16 2017-08-22 Seagate Technology Llc Digital automatic power control
US10381036B1 (en) 2016-02-16 2019-08-13 Seagate Technology Llc Laser bias calibration
US9916850B1 (en) 2016-08-19 2018-03-13 Seagate Technology Llc Laser bias current control

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5107378A (en) * 1986-06-13 1992-04-21 Magnetic Peripherals, Inc. Adaptive magnetic recording and readback system
US4799112A (en) 1987-02-19 1989-01-17 Magnetic Peripherals Inc. Method and apparatus for recording data
US5172280A (en) * 1989-10-26 1992-12-15 Archive Corporation Apparatus and method for automatic write current calibration in a streaming tape drive
US5132852A (en) * 1990-06-28 1992-07-21 Vtc Bipolar Corporation Read/write preamplifier with head isolation
US5130866A (en) * 1990-07-17 1992-07-14 International Business Machines Corporation Method and circuitry for in-situ measurement of transducer/recording medium clearance and transducer magnetic instability
US5262907A (en) 1991-07-31 1993-11-16 Seagate Technology, Inc. Hard disc drive with improved servo system
US5367411A (en) 1991-08-02 1994-11-22 Hitachi, Ltd. Magnetic recording and reproducing apparatus with reproducing head of magnetoresistive type having control of magnetic bias level
US5270882A (en) * 1992-07-15 1993-12-14 International Business Machines Corporation Low-voltage, low-power amplifier for magnetoresistive sensor
JPH06259714A (ja) 1993-03-09 1994-09-16 Hitachi Ltd 磁気ディスク装置
US6091562A (en) * 1993-08-03 2000-07-18 Sony Corporation Digital magnetic reproducing apparatus and digital magnetic recording/reproducing apparatus employing detection of second harmonic distortion and signal to noise ratio
US5600500A (en) 1994-11-14 1997-02-04 Seagate Technology, Inc. Performance based write current optimization process
US5726821A (en) 1995-12-22 1998-03-10 Western Digital Corporation Programmable preamplifier unit with serial interface for disk data storage device using MR heads

Also Published As

Publication number Publication date
US6288863B1 (en) 2001-09-11
EP0878002B1 (de) 2000-05-10
DE69516914T2 (de) 2000-10-05
KR100370463B1 (ko) 2003-03-15
JPH11512210A (ja) 1999-10-19
KR19990044438A (ko) 1999-06-25
EP0878002A1 (de) 1998-11-18
WO1997009714A1 (en) 1997-03-13

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Legal Events

Date Code Title Description
8327 Change in the person/name/address of the patent owner

Owner name: SEAGATE TECHNOLOGY LLC, SCOTTS VALLEY, CALIF., US

8328 Change in the person/name/address of the agent

Free format text: HENKEL, FEILER & HAENZEL, 81675 MUENCHEN

8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee