DE69321275D1 - Antriebsvorrichtung eines Magnetkopfes und magneto-optisches Aufzeichnungsgerät - Google Patents

Antriebsvorrichtung eines Magnetkopfes und magneto-optisches Aufzeichnungsgerät

Info

Publication number
DE69321275D1
DE69321275D1 DE69321275T DE69321275T DE69321275D1 DE 69321275 D1 DE69321275 D1 DE 69321275D1 DE 69321275 T DE69321275 T DE 69321275T DE 69321275 T DE69321275 T DE 69321275T DE 69321275 D1 DE69321275 D1 DE 69321275D1
Authority
DE
Germany
Prior art keywords
magneto
magnetic head
optical recording
drive device
recording 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
DE69321275T
Other languages
English (en)
Other versions
DE69321275T2 (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
Publication of DE69321275D1 publication Critical patent/DE69321275D1/de
Application granted granted Critical
Publication of DE69321275T2 publication Critical patent/DE69321275T2/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
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/04—Modifications for accelerating switching
    • H03K17/041—Modifications for accelerating switching without feedback from the output circuit to the control circuit
    • H03K17/0416—Modifications for accelerating switching without feedback from the output circuit to the control circuit by measures taken in the output circuit
    • H03K17/04163—Modifications for accelerating switching without feedback from the output circuit to the control circuit by measures taken in the output circuit in field-effect transistor switches
    • 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
    • H03K17/60—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 bipolar transistors
    • H03K17/66—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will
    • H03K17/661—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will connected to both load terminals
    • 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
DE69321275T 1992-03-06 1993-03-04 Antriebsvorrichtung eines Magnetkopfes und magneto-optisches Aufzeichnungsgerät Expired - Fee Related DE69321275T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP8305692 1992-03-06
JP04993993A JP3188339B2 (ja) 1992-03-06 1993-02-17 磁気ヘッド駆動装置および光磁気記録装置

Publications (2)

Publication Number Publication Date
DE69321275D1 true DE69321275D1 (de) 1998-11-05
DE69321275T2 DE69321275T2 (de) 1999-03-25

Family

ID=26390379

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69321275T Expired - Fee Related DE69321275T2 (de) 1992-03-06 1993-03-04 Antriebsvorrichtung eines Magnetkopfes und magneto-optisches Aufzeichnungsgerät

Country Status (4)

Country Link
US (1) US5559763A (de)
EP (1) EP0559469B1 (de)
JP (1) JP3188339B2 (de)
DE (1) DE69321275T2 (de)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
JP3179276B2 (ja) * 1993-03-26 2001-06-25 キヤノン株式会社 磁気ヘッド駆動方法および光磁気記録方法
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
US5666333A (en) * 1995-04-07 1997-09-09 Discovision Associates Biasing level controller for magneto-optical recording device
US6040954A (en) * 1997-04-17 2000-03-21 International Business Machines Corporation High speed write driver for magnetic inductive write head using a half-switched H-driver
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
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
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
JP2000048422A (ja) 1998-07-30 2000-02-18 Canon Inc 光磁気記録用磁気ヘッドおよび光磁気記録装置
JP3573997B2 (ja) * 1999-03-31 2004-10-06 三洋電機株式会社 磁気ヘッド駆動回路および磁気記録装置
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
KR100924696B1 (ko) * 2007-07-05 2009-11-03 삼성전자주식회사 하드디스크 드라이브의 기록밀도 향상방법 및 그 제어장치

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3326066A1 (de) * 1983-07-20 1985-01-31 Robert Bosch Gmbh, 7000 Stuttgart Verfahren zum betrieb einer gegentakt-verstaerkeranordnung und verstaerkeranordnung hierfuer
JPH0743805B2 (ja) * 1986-10-07 1995-05-15 ソニー株式会社 磁気ヘツド駆動回路
JPH0833974B2 (ja) * 1987-08-19 1996-03-29 ソニー株式会社 磁気ヘッド駆動回路
US5233577A (en) * 1987-10-14 1993-08-03 U.S. Philips Corp. Magneto-optical recording apparatus and energizing circuit for use in such a magneto-optical recording apparatus
JP2808597B2 (ja) * 1988-02-22 1998-10-08 日本電気株式会社 光磁気ディスク用磁界印加電磁石
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
JPH01303606A (ja) * 1988-05-31 1989-12-07 Matsushita Electric Ind Co Ltd 記録再生装置
FR2632438A1 (fr) * 1988-06-07 1989-12-08 Philips Nv Enregistreur magneto-optique a champ magnetique module
DE3838858A1 (de) * 1988-11-17 1990-05-23 Thomson Brandt Gmbh Schaltungsanordnung zur umkehrung eines magnetfeldes
US5121369A (en) * 1989-05-25 1992-06-09 International Business Machines Corporation Method and apparatus for direct overwriting information on a magneto-optical recording medium using constant laser beam modulated magnetic field generator
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
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
EP0559469B1 (de) 1998-09-30
JPH0612605A (ja) 1994-01-21
DE69321275T2 (de) 1999-03-25
EP0559469A3 (de) 1994-02-16
EP0559469A2 (de) 1993-09-08
US5559763A (en) 1996-09-24
JP3188339B2 (ja) 2001-07-16

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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