BR9006789A - Circuito de comando de modulacao do campo magnetico para gravacao de uma memoria magneto-otica - Google Patents

Circuito de comando de modulacao do campo magnetico para gravacao de uma memoria magneto-otica

Info

Publication number
BR9006789A
BR9006789A BR909006789A BR9006789A BR9006789A BR 9006789 A BR9006789 A BR 9006789A BR 909006789 A BR909006789 A BR 909006789A BR 9006789 A BR9006789 A BR 9006789A BR 9006789 A BR9006789 A BR 9006789A
Authority
BR
Brazil
Prior art keywords
pct
coil
magneto
recording
switches
Prior art date
Application number
BR909006789A
Other languages
English (en)
Inventor
Jean-Claude Lehureau
Original Assignee
Thomson Csf
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 Thomson Csf filed Critical Thomson Csf
Publication of BR9006789A publication Critical patent/BR9006789A/pt

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
BR909006789A 1989-06-02 1990-06-01 Circuito de comando de modulacao do campo magnetico para gravacao de uma memoria magneto-otica BR9006789A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR898907307A FR2647940B1 (fr) 1989-06-02 1989-06-02 Circuit de commande de modulation du champ magnetique pour l'enregistrement d'une memoire magneto-optique
PCT/FR1990/000386 WO1990015409A1 (fr) 1989-06-02 1990-06-01 Circuit de commande de modulation du champ magnetique pour l'enregistrement d'une memoire magneto-optique

Publications (1)

Publication Number Publication Date
BR9006789A true BR9006789A (pt) 1991-08-13

Family

ID=9382306

Family Applications (1)

Application Number Title Priority Date Filing Date
BR909006789A BR9006789A (pt) 1989-06-02 1990-06-01 Circuito de comando de modulacao do campo magnetico para gravacao de uma memoria magneto-otica

Country Status (14)

Country Link
US (1) US5157641A (pt)
EP (1) EP0428677B1 (pt)
JP (1) JP3171594B2 (pt)
KR (1) KR100189673B1 (pt)
CN (1) CN1048107C (pt)
AT (1) ATE120874T1 (pt)
AU (1) AU626065B2 (pt)
BR (1) BR9006789A (pt)
CA (1) CA2033344A1 (pt)
DE (1) DE69018383T2 (pt)
ES (1) ES2072436T3 (pt)
FR (1) FR2647940B1 (pt)
GR (1) GR900100421A (pt)
WO (1) WO1990015409A1 (pt)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3907057A1 (de) * 1989-03-04 1990-09-13 Thomson Brandt Gmbh Schaltungsanordnung zur umkehrung eines magnetfeldes
JPH03214441A (ja) * 1990-01-18 1991-09-19 Canon Inc 光磁気記録装置
JP2976697B2 (ja) * 1992-05-29 1999-11-10 松下電器産業株式会社 光磁気ディスク用変調磁界発生装置
US5964759A (en) * 1992-10-27 1999-10-12 Ortho Development Corporation Electroconvergent cautery system
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
JPH0729234A (ja) * 1993-07-07 1995-01-31 Sony Corp 光磁気記録再生装置
JPH07182717A (ja) * 1993-12-24 1995-07-21 Sharp Corp 光磁気記録再生装置
EP0762410A4 (en) 1994-05-10 1998-01-07 Hitachi Maxell MAGNETOOPIC RECORDING MEDIUM, RECORDING AND PLAYBACK METHOD AND DEVICE
FR2723242B1 (fr) * 1994-07-26 1996-08-30 Thomson Csf Tete magnetique a element saturable et dispositif matriciel comportant un ensemble de tetes magnetiques
FR2739965B1 (fr) * 1995-10-17 1997-11-07 Thomson Csf Dispositif emetteur-recepteur de lumiere et systeme de lecture optique
US5920538A (en) * 1998-06-11 1999-07-06 Tandberg Data Asa Magneto-optical readout method and magneto-optical readout head and method for making same
FR2786345B1 (fr) 1998-11-24 2001-02-09 Thomson Csf Dispositif de cryptage quantique
US7149173B2 (en) * 2000-10-17 2006-12-12 Thales Medium for recording optically readable data, method for making same and optical system reproducing said data
FR2824905B1 (fr) * 2001-05-15 2003-08-29 Thomson Csf Gyrometre a fibre optique
CN109361379A (zh) * 2018-09-18 2019-02-19 天津大学 一种基于脉宽调制电路的电磁层析成像系统激励信号源
CN112670064B (zh) * 2020-05-08 2021-08-20 云南人民电力电气有限公司 一种节能滤波型电力变压器

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3484673A (en) * 1966-12-27 1969-12-16 Badger Meter Mfg Co Pulse generator with energy conserving circuit
US3737735A (en) * 1972-02-04 1973-06-05 Minnesota Mining & Mfg Autotransformer assisted resonated energy transfer circuit
JPS59140605A (ja) * 1983-01-31 1984-08-13 Canon Inc 光磁気記録装置の情報消去方法
US4872078A (en) * 1986-04-24 1989-10-03 International Business Machines Corporation Method and apparatus for encoding and direct overwriting of magneto-optic data
US4841407A (en) * 1986-06-16 1989-06-20 Canon Kabushiki Kaisha Magnetic field generator having a plurality of coils for generating magnetic field in substantially the same space and method of driving the same
JPS6334756A (ja) * 1986-07-28 1988-02-15 Sony Corp 光磁気メモリの記録方法
JP2575120B2 (ja) * 1986-07-31 1997-01-22 ソニー株式会社 光磁気記録装置
JPS6355746A (ja) * 1986-08-26 1988-03-10 Canon Inc 光磁気記録媒体の記録装置
ES2043789T3 (es) * 1987-10-14 1994-01-01 Philips Nv Aparato de grabacion magneto-optico y circuito energetico para uso en un aparato de grabacion magneto-optica.

Also Published As

Publication number Publication date
EP0428677B1 (fr) 1995-04-05
ES2072436T3 (es) 1995-07-16
WO1990015409A1 (fr) 1990-12-13
JP3171594B2 (ja) 2001-05-28
KR920701956A (ko) 1992-08-12
GR900100421A (el) 1991-11-15
CN1048107C (zh) 2000-01-05
AU5742990A (en) 1991-01-07
KR100189673B1 (ko) 1999-06-01
CA2033344A1 (fr) 1990-12-03
FR2647940B1 (fr) 1994-03-04
FR2647940A1 (fr) 1990-12-07
AU626065B2 (en) 1992-07-23
DE69018383T2 (de) 1995-10-05
JPH04500285A (ja) 1992-01-16
US5157641A (en) 1992-10-20
DE69018383D1 (de) 1995-05-11
ATE120874T1 (de) 1995-04-15
CN1047751A (zh) 1990-12-12
EP0428677A1 (fr) 1991-05-29

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Legal Events

Date Code Title Description
FA Application withdrawn