NO953584L - Digitalt registreringssystem - Google Patents

Digitalt registreringssystem

Info

Publication number
NO953584L
NO953584L NO953584A NO953584A NO953584L NO 953584 L NO953584 L NO 953584L NO 953584 A NO953584 A NO 953584A NO 953584 A NO953584 A NO 953584A NO 953584 L NO953584 L NO 953584L
Authority
NO
Norway
Prior art keywords
output signal
registration system
bias current
transducer
head
Prior art date
Application number
NO953584A
Other languages
English (en)
Other versions
NO953584D0 (no
Inventor
Robert Youngquist
Richard Molstad
Theodore Schwartz
Original Assignee
Minnesota Mining & Mfg
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 Minnesota Mining & Mfg filed Critical Minnesota Mining & Mfg
Publication of NO953584L publication Critical patent/NO953584L/no
Publication of NO953584D0 publication Critical patent/NO953584D0/no

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
    • G11B5/09—Digital recording
    • 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
    • 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

Landscapes

  • Recording Or Reproducing By Magnetic Means (AREA)
  • Digital Magnetic Recording (AREA)
  • Magnetic Heads (AREA)

Abstract

Et digitalt registreringssystem (50) benytter en magnetoresistiv transduser (54) i et magnetisk registreringshode. Systemet måler amplituden til et utgangssignal (22), E0, fra transduseren for forskjellige forstrømmer når et innspilt magnetisk medium (52) passerer forbi hodet. Systemet bestemmer deretter forstrømmen for hvilket utgangssignalet, E0, maksimeres og multipliserer denne forstrøm med en passende faktor. Systemet arbeider deretter på det beregnede forstrømsnivå og minimerer derved feilraten (12) til systemet.
NO953584A 1993-03-12 1995-09-11 Digitalt registreringssystem NO953584D0 (no)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/030,800 US5390054A (en) 1993-03-12 1993-03-12 Method and system for minimizing the error rate of a digital recording system by predicting the optimal bias current
PCT/US1994/000832 WO1994020953A1 (en) 1993-03-12 1994-01-24 Digital recording system

Publications (2)

Publication Number Publication Date
NO953584L true NO953584L (no) 1995-09-11
NO953584D0 NO953584D0 (no) 1995-09-11

Family

ID=21856112

Family Applications (1)

Application Number Title Priority Date Filing Date
NO953584A NO953584D0 (no) 1993-03-12 1995-09-11 Digitalt registreringssystem

Country Status (7)

Country Link
US (1) US5390054A (no)
EP (1) EP0688456B1 (no)
JP (1) JPH08507401A (no)
KR (1) KR960701434A (no)
DE (1) DE69402844T2 (no)
NO (1) NO953584D0 (no)
WO (1) WO1994020953A1 (no)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US5661614A (en) * 1994-05-31 1997-08-26 International Business Machines Corporation Method and apparatus for error recovery for unstable magnetorestrictive heads
US5600500A (en) * 1994-11-14 1997-02-04 Seagate Technology, Inc. Performance based write current optimization process
US5943177A (en) 1995-05-26 1999-08-24 Maxtor Corporation MR head read signal preconditioning circuitry for reducing pulse -to-pulse baseline distortion
KR19990022302A (ko) * 1995-06-06 1999-03-25 칼로타 바스미스 자기 저항 기록 헤드용 프로그램가능한 바이어스 전류를 통한에러 정정 장치 및 방법
JP3246374B2 (ja) * 1997-01-13 2002-01-15 株式会社日立製作所 磁気抵抗効果型素子を用いた磁気記録装置
KR100518512B1 (ko) * 1998-01-15 2005-11-25 삼성전자주식회사 리드 바이어스 전류 설정 방법
KR100562146B1 (ko) 1998-03-04 2006-05-25 삼성전자주식회사 엠.알-바이어스 전류 최적화방법
DE69935094T2 (de) * 1998-07-17 2007-11-22 Koninklijke Philips Electronics N.V. Magnetische Informationslesevorrichtung
US6512647B1 (en) * 1999-08-27 2003-01-28 Seagate Technology Llc Method and apparatus for adaptive tuning bias current for magnetoresistive head
JP3613396B2 (ja) * 2001-06-25 2005-01-26 日本電気株式会社 機能ブロック
DE10140517A1 (de) * 2001-08-17 2003-02-27 Philips Corp Intellectual Pty Schaltungsanordnung zur Steuerung eines Sensors

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3016507A (en) * 1959-09-14 1962-01-09 Ibm Thin film magneto resistance device
US3967368A (en) * 1972-10-11 1976-07-06 International Business Machines Corporation Method for manufacturing and using an internally biased magnetoresistive magnetic transducer
US3979775A (en) * 1975-09-08 1976-09-07 International Business Machines Corporation Magnetoresistive multitransducer assembly with compensation elements for thermal drift and bias balancing
US4050086A (en) * 1976-05-06 1977-09-20 International Business Machines Corporation Dynamic transducer biasing signal amplifying circuitry
JPS54157610A (en) * 1978-05-26 1979-12-12 Sony Corp Magnetic head
FR2508203A1 (fr) * 1981-06-19 1982-12-24 Cii Honeywell Bull Dispositif de transduction magnetoresistant de lecture d'informations codees a faible densite
US4523243A (en) * 1982-05-24 1985-06-11 Storage Technology Corporation Magnetoresistive transducer using an independent recessed electromagnetic bias
CA1248222A (en) * 1984-08-27 1989-01-03 Yutaka Souda Magnetic transducer head utilizing magnetoresistance effect
JPS61102520A (ja) * 1984-10-24 1986-05-21 Canon Inc 磁気センサ−装置
US4802043A (en) * 1985-03-25 1989-01-31 Hitachi, Ltd. Magneto-resistive head for protecting against output spike noises
US4712144A (en) * 1985-08-20 1987-12-08 International Business Machines Corporation Method and apparatus for reading recorded data by a magnetoresistive head
JPS6289204A (ja) * 1985-10-16 1987-04-23 Sanyo Electric Co Ltd デジタル信号の再生装置
US4967298A (en) * 1987-02-17 1990-10-30 Mowry Greg S Magnetic head with magnetoresistive sensor, inductive write head, and shield
US5081554A (en) * 1987-04-01 1992-01-14 Digital Equipment Corporation Biasing conductor for MR head
US5159511A (en) * 1987-04-01 1992-10-27 Digital Equipment Corporation Biasing conductor for MR head
JPH0467304A (ja) * 1990-07-02 1992-03-03 Nec Corp 磁気記録情報再生回路
US5301080A (en) * 1992-12-31 1994-04-05 International Business Machines Corporation Bias servo loop for magneto-resistive read/write head

Also Published As

Publication number Publication date
EP0688456B1 (en) 1997-04-23
WO1994020953A1 (en) 1994-09-15
DE69402844T2 (de) 1997-11-27
KR960701434A (ko) 1996-02-24
EP0688456A1 (en) 1995-12-27
DE69402844D1 (de) 1997-05-28
US5390054A (en) 1995-02-14
NO953584D0 (no) 1995-09-11
JPH08507401A (ja) 1996-08-06

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