DE3780677D1 - Schaltung zur vormagnetisierung eines magnetoresistiven sensors und verstaerkung der damit produzierten signale. - Google Patents

Schaltung zur vormagnetisierung eines magnetoresistiven sensors und verstaerkung der damit produzierten signale.

Info

Publication number
DE3780677D1
DE3780677D1 DE8787104313T DE3780677T DE3780677D1 DE 3780677 D1 DE3780677 D1 DE 3780677D1 DE 8787104313 T DE8787104313 T DE 8787104313T DE 3780677 T DE3780677 T DE 3780677T DE 3780677 D1 DE3780677 D1 DE 3780677D1
Authority
DE
Germany
Prior art keywords
magnetizing
amplifying
circuit
signals produced
magnetoresistive sensor
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
DE8787104313T
Other languages
English (en)
Other versions
DE3780677T2 (de
Inventor
Klaas Berend Klaassen
Stephen Alan Jove
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.)
HGST Netherlands BV
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 DE3780677D1 publication Critical patent/DE3780677D1/de
Application granted granted Critical
Publication of DE3780677T2 publication Critical patent/DE3780677T2/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
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
    • G01R33/09—Magnetoresistive devices
    • 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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Amplifiers (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Measuring Magnetic Variables (AREA)
DE8787104313T 1986-04-14 1987-03-24 Schaltung zur vormagnetisierung eines magnetoresistiven sensors und verstaerkung der damit produzierten signale. Expired - Lifetime DE3780677T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/851,649 US4706138A (en) 1986-04-14 1986-04-14 Amplification of signals produced by a magnetic sensor

Publications (2)

Publication Number Publication Date
DE3780677D1 true DE3780677D1 (de) 1992-09-03
DE3780677T2 DE3780677T2 (de) 1993-03-11

Family

ID=25311303

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8787104313T Expired - Lifetime DE3780677T2 (de) 1986-04-14 1987-03-24 Schaltung zur vormagnetisierung eines magnetoresistiven sensors und verstaerkung der damit produzierten signale.

Country Status (9)

Country Link
US (1) US4706138A (de)
EP (1) EP0241770B1 (de)
JP (1) JPH0758525B2 (de)
AR (1) AR241299A1 (de)
AT (1) ATE78931T1 (de)
AU (1) AU586084B2 (de)
BR (1) BR8701657A (de)
CA (1) CA1268223A (de)
DE (1) DE3780677T2 (de)

Families Citing this family (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4786993A (en) * 1986-06-30 1988-11-22 International Business Machines Corporation Voltage amplifier for constant voltage biasing and amplifying signals from a MR sensor
US4879610A (en) * 1988-09-28 1989-11-07 International Business Machines Corporation Protective circuit for a magnetoresistive element
US5227212A (en) * 1989-03-16 1993-07-13 International Business Machines Corporation Magnetic recording disk, magnetoresistive read head, inductive write head combination
US5032935A (en) * 1989-12-12 1991-07-16 International Business Machines Corporation Amplification of signals produced by a magnetoresistive element
US5103353A (en) * 1990-05-01 1992-04-07 International Business Machines Corporation Low noise amplifier with short circuit protection for signals from magnetoresistive element
JPH0487003A (ja) * 1990-07-31 1992-03-19 Fujitsu Ltd 磁気抵抗効果ヘッドの信号検出回路
US5122915A (en) * 1990-09-26 1992-06-16 Minnesota Mining And Manufacturing Company Low-noise preamplifier for magneto-resistive heads
US5204789A (en) * 1991-01-31 1993-04-20 International Business Machines Corporation Low noise voltage-biasing amplifier for magnetoresistive element
JP3109889B2 (ja) * 1992-01-30 2000-11-20 株式会社日立製作所 磁気ヘッド用回路
US5283521A (en) * 1992-05-26 1994-02-01 International Business Machines Corporation Method and system for adaptive digital linearization of an output signal from a magnetoresistive head
US5270882A (en) * 1992-07-15 1993-12-14 International Business Machines Corporation Low-voltage, low-power amplifier for magnetoresistive sensor
US5309294A (en) * 1992-09-08 1994-05-03 Rocky Mountain Magnetics, Inc. Method and circuitry to provide true voltage bias to a magnetoresistive head
US5323278A (en) * 1992-09-17 1994-06-21 International Business Machines Corporation Low noise amplifier circuit for magnetoresistive sensors for fast read-write switching in low supply voltage applications
US5331478A (en) * 1992-10-07 1994-07-19 Silicon Systems, Inc. Magnetoresistive head amplifier
US5309295A (en) * 1992-10-08 1994-05-03 International Business Machines Corporation Method and apparatus for biasing a magneto-resistive head
JP2707191B2 (ja) * 1992-10-19 1998-01-28 シャープ株式会社 マルチトラック磁気信号再生装置
MY112702A (en) * 1992-10-30 2001-08-30 Sony Corp Reproducing circuit for a magnetic head.
US5327303A (en) * 1992-12-18 1994-07-05 Seagate Technology, Inc. MR preamplifier having feedback loops for minimizing differential low frequency components and regulating common mode low frequency components of the preamplifier output signal
US5455730A (en) * 1993-02-18 1995-10-03 International Business Machines Corporation Contact magnetic recording disk file with a magnetoresistive read sensor
JP2994522B2 (ja) * 1993-02-22 1999-12-27 富士通株式会社 磁気抵抗素子用プリアンプ
US5398144A (en) * 1993-02-25 1995-03-14 Vtc Inc. Bias generator for a low voltage differential read amplifier
KR100309085B1 (ko) * 1993-10-06 2001-12-17 요트.게.아. 롤페즈 기록매체상의트랙으로부터정보를판독하는장치
US5412518A (en) * 1993-12-16 1995-05-02 International Business Machines Corporation Individual MR transducer head/disk/channel adaptive bias current system
US5444579A (en) * 1993-12-17 1995-08-22 Imp, Inc. Preamplifier of a signal from a variable resistance sensor, and a current source
US5534818A (en) * 1993-12-30 1996-07-09 Vtc Inc. Preamplifier noise filtering circuit
US5426542A (en) * 1994-01-21 1995-06-20 Seagate Technology, Inc. Electronically coupled high-impedance magnetoresistive preamplifier
US5781042A (en) * 1995-09-19 1998-07-14 Vtc Inc. Modal transition imbalance detector
US5717536A (en) * 1995-09-19 1998-02-10 Vtc Inc. Single-ended cascode amplifier for magnetoresistive sensors
US6057972A (en) * 1995-11-03 2000-05-02 International Business Machines Corporation Current source for a magnetoresistive head with variability and selectable slew rate
US5877911A (en) * 1996-03-13 1999-03-02 International Business Machines Corporation Magneto-resistive head pre-amplifying circuit for avoiding output voltage transients
US5774291A (en) * 1996-03-28 1998-06-30 International Business Machines Corporation Voltage measurement circuit for a magnetoresistive head installed in a disk enclosure
US5914630A (en) * 1996-05-10 1999-06-22 Vtc Inc. MR head preamplifier with output signal amplitude which is independent of head resistance
US5856891A (en) * 1997-01-22 1999-01-05 Vtc Inc. MR resistive-biasing scheme providing low noise high common-mode rejection and high supply rejection
US6567233B1 (en) 1998-11-20 2003-05-20 Cirrus Logic, Inc. 4-D shock-sensing for hard-disk drives
US6606212B1 (en) 1999-03-17 2003-08-12 International Business Machines Corporation Wideband readout of magneto-resistive heads for data storage
US6452455B2 (en) * 2000-07-21 2002-09-17 Texas Instruments Incorporated Capacitor bias recovery methodology
US6667842B2 (en) * 2001-03-01 2003-12-23 Agere Systems, Inc. Negative feedback impedance matched preamplifier
US6700196B1 (en) 2002-09-23 2004-03-02 Honeywell Federal Manufacturing & Technologies Programmable multi-chip module
US6822817B2 (en) * 2002-10-31 2004-11-23 International Business Machines Corporation Preamplifier circuit suitable for use in magnetic storage devices
US8269491B2 (en) 2008-02-27 2012-09-18 Allegro Microsystems, Inc. DC offset removal for a magnetic field sensor
IT1402178B1 (it) 2010-09-09 2013-08-28 St Microelectronics Srl Circuito di lettura a compensazione automatica dell'offset per un sensore di campo magnetico e relativo metodo di lettura a compensazione automatica dell'offset
US10473731B2 (en) 2010-11-26 2019-11-12 Stmicroelectronics S.R.L. Magnetic sensor reading device, system and method
US9594099B2 (en) * 2011-10-12 2017-03-14 Semiconductor Components Industries, Llc Method of and circuit for brown-out detection
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

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4492997A (en) * 1980-11-28 1985-01-08 Hitachi, Ltd. Reproducing and amplifying circuit for magnetoresistive head
JPS58154615A (ja) * 1982-03-10 1983-09-14 Copal Co Ltd 磁気検出装置
JPH0610842B2 (ja) * 1983-08-15 1994-02-09 株式会社日立製作所 抵抗変化検出回路

Also Published As

Publication number Publication date
JPS62245503A (ja) 1987-10-26
BR8701657A (pt) 1988-01-05
CA1268223A (en) 1990-04-24
AR241299A1 (es) 1992-04-30
DE3780677T2 (de) 1993-03-11
AU586084B2 (en) 1989-06-29
AU7144487A (en) 1987-10-15
ATE78931T1 (de) 1992-08-15
JPH0758525B2 (ja) 1995-06-21
US4706138A (en) 1987-11-10
EP0241770B1 (de) 1992-07-29
EP0241770A1 (de) 1987-10-21

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: HITACHI GLOBAL STORAGE TECHNOLOGIES NETHERLANDS B.