DE69425342D1 - Magnetkopfantriebsvorrichtung und magnetooptisches Aufzeichnungsgerät - Google Patents

Magnetkopfantriebsvorrichtung und magnetooptisches Aufzeichnungsgerät

Info

Publication number
DE69425342D1
DE69425342D1 DE69425342T DE69425342T DE69425342D1 DE 69425342 D1 DE69425342 D1 DE 69425342D1 DE 69425342 T DE69425342 T DE 69425342T DE 69425342 T DE69425342 T DE 69425342T DE 69425342 D1 DE69425342 D1 DE 69425342D1
Authority
DE
Germany
Prior art keywords
magneto
magnetic head
optical recording
head drive
drive device
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
DE69425342T
Other languages
English (en)
Other versions
DE69425342T2 (de
Inventor
Kazuyoshi Ishii
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Application granted granted Critical
Publication of DE69425342D1 publication Critical patent/DE69425342D1/de
Publication of DE69425342T2 publication Critical patent/DE69425342T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
    • H03K17/6871—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors the output circuit comprising more than one controlled field-effect transistor
    • 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
DE69425342T 1993-03-26 1994-03-25 Magnetkopfantriebsvorrichtung und magnetooptisches Aufzeichnungsgerät Expired - Fee Related DE69425342T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP9048393 1993-03-26
JP03963894A JP3179276B2 (ja) 1993-03-26 1994-03-10 磁気ヘッド駆動方法および光磁気記録方法

Publications (2)

Publication Number Publication Date
DE69425342D1 true DE69425342D1 (de) 2000-08-31
DE69425342T2 DE69425342T2 (de) 2000-12-14

Family

ID=26379025

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69425342T Expired - Fee Related DE69425342T2 (de) 1993-03-26 1994-03-25 Magnetkopfantriebsvorrichtung und magnetooptisches Aufzeichnungsgerät

Country Status (4)

Country Link
US (1) US5579293A (de)
EP (1) EP0622792B1 (de)
JP (1) JP3179276B2 (de)
DE (1) DE69425342T2 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3351148B2 (ja) * 1994-12-07 2002-11-25 ソニー株式会社 記録装置、磁気ヘッド駆動装置
JPH1092045A (ja) * 1996-09-18 1998-04-10 Canon Inc 信号再生装置
JPH1186203A (ja) * 1997-09-03 1999-03-30 Canon Inc 磁気ヘッド駆動装置及び光磁気記録装置
US5870270A (en) * 1997-10-13 1999-02-09 Bachmann Industries, Inc. Non-burnout controller for a switching coil
JP3507360B2 (ja) 1998-05-07 2004-03-15 キヤノン株式会社 磁気ヘッド用平面コイル部品、光磁気記録用磁気ヘッドおよび光磁気記録装置
JP2000030203A (ja) 1998-05-07 2000-01-28 Canon Inc 磁気ヘッド用コイル、光磁気記録用磁気ヘッドおよび光磁気記録装置
JP2001067748A (ja) 1999-08-31 2001-03-16 Canon Inc 光磁気記録ヘッドおよび光磁気記録装置
JP2001176142A (ja) * 1999-12-16 2001-06-29 Canon Inc 磁気ヘッド駆動回路及び光磁気記録装置
JP2001229589A (ja) 2000-02-16 2001-08-24 Canon Inc 光磁気記録媒体及び光磁気記録装置
JP2004227712A (ja) * 2003-01-24 2004-08-12 Canon Inc 磁気ヘッド支持機構

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0743805B2 (ja) * 1986-10-07 1995-05-15 ソニー株式会社 磁気ヘツド駆動回路
DE3708499A1 (de) * 1987-03-16 1988-10-20 Sgs Halbleiterbauelemente Gmbh Digitale gegentakt-treiberschaltung
JPS63244402A (ja) * 1987-03-31 1988-10-11 Sony Corp 記録用磁界発生回路
JPH0833974B2 (ja) * 1987-08-19 1996-03-29 ソニー株式会社 磁気ヘッド駆動回路
EP0312413B1 (de) * 1987-10-07 1993-05-05 Georges Ratkoff Tragbares Gerät zur lokalen Erwärmung der Haut für therapeutische Zwecke
EP0312143B1 (de) * 1987-10-14 1993-08-18 Koninklijke Philips Electronics N.V. Magnetooptische Aufzeichnungsvorrichtung und Betätigungsschaltung zur Anwendung in derartigen, magnetooptischen Aufzeichnungsvorrichtungen
JP2811673B2 (ja) * 1988-03-03 1998-10-15 日本電気株式会社 光磁気ディスク用磁界印加電磁石
US4937470A (en) * 1988-05-23 1990-06-26 Zeiler Kenneth T Driver circuit for power transistors
FR2647940B1 (fr) * 1989-06-02 1994-03-04 Thomson Csf Circuit de commande de modulation du champ magnetique pour l'enregistrement d'une memoire magneto-optique
JPH03157839A (ja) * 1989-11-15 1991-07-05 Matsushita Electric Ind Co Ltd 光磁気ディスク用高周波変調磁界発生装置
US5278809A (en) * 1990-01-17 1994-01-11 Olympus Optical Co., Ltd. Photomagnetic recording apparatus recording with alternating magnetic field and D.C. magnetic field
JPH03272038A (ja) * 1990-03-20 1991-12-03 Canon Inc 磁気ヘッド装置
JP2531997B2 (ja) * 1990-03-26 1996-09-04 ティアツク株式会社 ディジタル記録回路
JPH04212702A (ja) * 1990-05-02 1992-08-04 Olympus Optical Co Ltd 磁気ヘッド駆動回路
JP2889411B2 (ja) * 1991-10-31 1999-05-10 キヤノン株式会社 磁気ヘッド駆動装置
JPH05128404A (ja) * 1991-11-07 1993-05-25 Tdk Corp 光磁気記録用変調磁界発生装置および光磁気記録装置
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

Also Published As

Publication number Publication date
US5579293A (en) 1996-11-26
EP0622792A3 (de) 1994-12-14
JPH06333202A (ja) 1994-12-02
DE69425342T2 (de) 2000-12-14
JP3179276B2 (ja) 2001-06-25
EP0622792B1 (de) 2000-07-26
EP0622792A2 (de) 1994-11-02

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee