NO960585L - Fremgangsmåte og anordning for å styre formagnetiseringsnivåer - Google Patents

Fremgangsmåte og anordning for å styre formagnetiseringsnivåer

Info

Publication number
NO960585L
NO960585L NO960585A NO960585A NO960585L NO 960585 L NO960585 L NO 960585L NO 960585 A NO960585 A NO 960585A NO 960585 A NO960585 A NO 960585A NO 960585 L NO960585 L NO 960585L
Authority
NO
Norway
Prior art keywords
current
controller
driver
bias
digital signal
Prior art date
Application number
NO960585A
Other languages
English (en)
Norwegian (no)
Other versions
NO960585D0 (no
Inventor
David Earl Lewis
Original Assignee
Discovision Ass
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 Discovision Ass filed Critical Discovision Ass
Publication of NO960585D0 publication Critical patent/NO960585D0/no
Publication of NO960585L publication Critical patent/NO960585L/no

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10502—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing characterised by the transducing operation to be executed
    • G11B11/10504—Recording
    • G11B11/10508—Recording by modulating only the magnetic field at the transducer
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F7/00—Regulating magnetic variables
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10595—Control of operating function
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/1055—Disposition or mounting of transducers relative to record carriers

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Control Of Ac Motors In General (AREA)
  • Hard Magnetic Materials (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Selective Calling Equipment (AREA)
NO960585A 1995-04-07 1996-02-14 Fremgangsmåte og anordning for å styre formagnetiseringsnivåer NO960585L (no)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/418,965 US5666333A (en) 1995-04-07 1995-04-07 Biasing level controller for magneto-optical recording device

Publications (2)

Publication Number Publication Date
NO960585D0 NO960585D0 (no) 1996-02-14
NO960585L true NO960585L (no) 1996-10-08

Family

ID=23660260

Family Applications (1)

Application Number Title Priority Date Filing Date
NO960585A NO960585L (no) 1995-04-07 1996-02-14 Fremgangsmåte og anordning for å styre formagnetiseringsnivåer

Country Status (17)

Country Link
US (2) US5666333A (zh)
EP (2) EP0736867A1 (zh)
JP (2) JPH08321090A (zh)
KR (2) KR100318176B1 (zh)
CN (2) CN1138192A (zh)
AT (1) ATE229687T1 (zh)
AU (1) AU721725B2 (zh)
BR (2) BR9600862A (zh)
CA (1) CA2169592C (zh)
DE (1) DE69625342T2 (zh)
ID (1) ID23024A (zh)
IL (1) IL117744A (zh)
MY (1) MY113235A (zh)
NO (1) NO960585L (zh)
RU (1) RU2182721C2 (zh)
SG (2) SG46579A1 (zh)
TW (1) TW288106B (zh)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4105407B2 (ja) * 2001-06-15 2008-06-25 富士通株式会社 磁界印加装置用コイル駆動回路及び情報記憶装置並びに磁界印加装置用コイル駆動制御方法
US6911904B2 (en) * 2002-09-03 2005-06-28 Lear Corporation System and method for adaptive variable magnetic field generator
TW200820571A (en) * 2006-10-27 2008-05-01 Fitipower Integrated Tech Inc Driving device
DE102018127394A1 (de) * 2018-11-02 2020-05-07 Bernd Burchard Vorrichtung und Verfahren zur Erzeugung und Regelung einer magnetischen Feldstärke

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2632438A1 (fr) * 1988-06-07 1989-12-08 Philips Nv Enregistreur magneto-optique a champ magnetique module
JPH065562B2 (ja) * 1988-07-20 1994-01-19 シャープ株式会社 光磁気記録再生装置の外部磁界装置
US5343448A (en) * 1988-07-20 1994-08-30 Sharp Kabushiki Kaiasha External magnetic field device for a magnetooptical information recording and reproducing apparatus
JPH065563B2 (ja) * 1988-10-28 1994-01-19 株式会社日立製作所 発生磁界制御方式
DE3838858A1 (de) * 1988-11-17 1990-05-23 Thomson Brandt Gmbh Schaltungsanordnung zur umkehrung eines magnetfeldes
US5179544A (en) * 1989-03-28 1993-01-12 U.S. Philips Corporation Control system for the magnetic head of a magneto-optical disc apparatus
US5172364A (en) * 1989-08-01 1992-12-15 Mitsubishi Denki Kabushiki Kaisha Magneto-optic recording apparatus with controlled magnetic field generation
US5159584A (en) * 1989-08-15 1992-10-27 Olympus Optical Company Limited Bias-Magnetic field generating system of photo-magnetic recording device
NL8902293A (nl) * 1989-09-14 1991-04-02 Philips Nv Werkwijze en inrichting voor het inschrijven en uitlezen van een magneto-optische registratiedrager.
JPH03134803A (ja) * 1989-10-20 1991-06-07 Canon Inc 光磁気記録装置
JPH07118106B2 (ja) * 1990-03-08 1995-12-18 パイオニア株式会社 光磁気記録再生装置
US5485435A (en) * 1990-03-20 1996-01-16 Canon Kabushiki Kaisha Magnetic field generator in which an end face of a magnetic material member projects from man end face of magnetic field generating cores
JPH03272039A (ja) * 1990-03-20 1991-12-03 Canon Inc 光磁気記録装置
JPH03276402A (ja) * 1990-03-27 1991-12-06 Matsushita Electric Ind Co Ltd 光磁気ディスク装置用バイアス磁界発生装置
NL9001546A (nl) * 1990-07-06 1992-02-03 Philips Nv Inrichting voor het inschrijven en/of uitlezen van een magneto-optische informatiedrager.
US5404342A (en) * 1992-01-16 1995-04-04 Sony Corporation Magnetic head device for magneto-optical disc system and magnetic head driving circuit
US5392273A (en) * 1992-02-28 1995-02-21 Fujitsu Limited Optical storage drive controller with predetermined light source drive values stored in non-volatile memory
US5481510A (en) * 1992-02-28 1996-01-02 Fujitsu Limited Seek control system for optical storage apparatus
JP3188339B2 (ja) * 1992-03-06 2001-07-16 キヤノン株式会社 磁気ヘッド駆動装置および光磁気記録装置
JP3139723B2 (ja) * 1992-05-15 2001-03-05 キヤノン株式会社 光磁気記録装置
JP3098896B2 (ja) * 1992-06-23 2000-10-16 キヤノン株式会社 光磁気記録装置
JPH0668402A (ja) * 1992-08-21 1994-03-11 Canon Inc 光磁気記録装置
JP3199517B2 (ja) * 1993-05-27 2001-08-20 オリンパス光学工業株式会社 光磁気記録用磁気ヘッド駆動装置

Also Published As

Publication number Publication date
BR9612810A (pt) 1999-11-09
SG46579A1 (en) 1998-02-20
TW288106B (zh) 1996-10-11
CA2169592A1 (en) 1996-10-08
IL117744A (en) 2001-09-13
US5721714A (en) 1998-02-24
EP0817183A2 (en) 1998-01-07
ATE229687T1 (de) 2002-12-15
JPH08321090A (ja) 1996-12-03
CN1138192A (zh) 1996-12-18
DE69625342D1 (de) 2003-01-23
EP0817183B1 (en) 2002-12-11
EP0736867A1 (en) 1996-10-09
CN1163883C (zh) 2004-08-25
KR100318176B1 (ko) 2002-04-22
SG87001A1 (en) 2002-03-19
EP0817183A3 (en) 1998-02-11
RU2182721C2 (ru) 2002-05-20
NO960585D0 (no) 1996-02-14
MY113235A (en) 2001-12-31
BR9600862A (pt) 1997-12-30
CA2169592C (en) 2007-04-10
US5666333A (en) 1997-09-09
AU721725B2 (en) 2000-07-13
ID23024A (id) 1996-10-24
AU4810896A (en) 1996-10-17
CN1214505A (zh) 1999-04-21
DE69625342T2 (de) 2003-04-24
KR100321564B1 (ko) 2002-05-09
JP2003109259A (ja) 2003-04-11
IL117744A0 (en) 1996-07-23
KR960038778A (ko) 1996-11-21

Similar Documents

Publication Publication Date Title
ATE165670T1 (de) Regelbares bildaufnahmesystem mit zwei detektoren
HK1047311A1 (zh) 具有校正非線性感測區的位置探測裝置
EP0930612A3 (en) Method of and apparatus for optical information reproduction
DE69412905D1 (de) Positionsdetektor
ATE176356T1 (de) Aufzeichnungs- und wiedergabegerät mit verwendung einer sonde
ATE137013T1 (de) Geber zur induktiven erzeugung eines messsignals
EP0569942A3 (zh)
EP0869381A3 (en) Lens driving control apparatus and method
NO960585D0 (no) Fremgangsmåte og anordning for å styre formagnetiseringsnivåer
MY138423A (en) Optical output adjusting apparatus based on shortest recording marks
JPS5793307A (en) Automatic focusing system
DE68917996D1 (de) Magneto-optisches Aufzeichnungsgerät mit moduliertem Magnetfeld.
CA2048194A1 (en) Apparatus for reading and/or inputting information
US5931876A (en) Tracking control circuit for automatic guide vehicle
EP0910078A3 (en) Optical device for photomagnetic recording, used in a recording/reproducing apparatus
EP0828384A3 (en) Controlling the movable lens of an image pickup apparatus
KR950020505A (ko) 디스크재생시스템에서의 포커스서보개시장치
KR100498979B1 (ko) 전압 감도와 위상 제어할 수 있는 액추에이터 및 이를구비한 광픽업
EP1184847A3 (en) Wobble detecting apparatus
EP0777220A3 (en) Objects-lens driving device for optical pickup
ATE171020T1 (de) Vorrichtung zur regelung eines aufzugmotors
ES2077161T3 (es) Dispositivo para inspeccionar monedas y discos analogos de metal.
JPH10275340A (ja) フォーカス制御装置
JPH06338003A (ja) 磁界印加装置
IT1276382B1 (it) Dispositivo circuitale per un anemometro