HK77896A - Circuit for magnetic or magneto-optical recording of data on a recording medium - Google Patents

Circuit for magnetic or magneto-optical recording of data on a recording medium

Info

Publication number
HK77896A
HK77896A HK77896A HK77896A HK77896A HK 77896 A HK77896 A HK 77896A HK 77896 A HK77896 A HK 77896A HK 77896 A HK77896 A HK 77896A HK 77896 A HK77896 A HK 77896A
Authority
HK
Hong Kong
Prior art keywords
circuit
winding
magneto
diode
free terminal
Prior art date
Application number
HK77896A
Other languages
German (de)
English (en)
Inventor
Zucker Friedhelm
Buechler Christian
Original Assignee
Deutsche Thomson-Brandt Gmbh
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 Deutsche Thomson-Brandt Gmbh filed Critical Deutsche Thomson-Brandt Gmbh
Publication of HK77896A publication Critical patent/HK77896A/xx

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Magnetic Heads (AREA)
  • General Induction Heating (AREA)

Claims (5)

  1. Circuit destiné à l'enregistrement magnétique ou magnéto-optique de données sur un support de données comprenant un montage série constitué d'une inductance (L) et d'une source de courant (Q), caractérisé par le fait qu'une bobine (S) est constituée de deux enroulements (W1, W2) de sens opposé avec prise médiane, que la prise médiane des deux enroulements (W1, W2) est connecté à une tension d'alimentation (U) par le montage série constitué de l'inductance (L) et de la source de courant (Q), que l'extrémité libre (B1) de l'un des enroulements (W1) est reliée au potentiel de référence par un premier commutateur commandé (S1) et l'extrémité libre (B2) de l'autre enroulement (W2) par un second commutateur commandé (S2) et que l'entrée de commande du premier commutateur commandé (S1) est raccordée à la première sortie (A1) et l'entrée de commande du second commutateur commandé (S2) à la seconde sortie (A2) d'un circuit de commande (AS).
  2. Circuit selon la revendication 1, caractérisé par le fait que l'extrémité libre (B1) de l'un des enroulements (W1) est relié au potentiel de référence via une première diode (D1) en série avec un montage en parallèle constitué d'une capacité (C) et d'une diode Zener (Z) et que l'extrémité libre (B2) de l'autre enroulement (W2) est relié au potentiel de référence via une seconde diode (D2) en série avec le montage en parallèle constitué de la capacité (C) et de la diode Zener (Z).
  3. Circuit selon la revendication 1 ou 2, caractérisé par le fait que le montage sert à inverser le sens de l'aimantation de la couche magnétique d'un support d'enregistrement magnétique et que lors de l'enregistrement de données numériques, les deux commutateurs commandés (S1, S2) sont ouverts et fermés en opposition de phase par le circuit de commande (AS) en fonction du bit à enregistrer.
  4. Circuit selon la revendication 3, caractérisé par le fait qu'un enregistrement magnéto-optique est prévu comme support d'enregistrement magnétique.
  5. Circuit selon la revendication 1, 2, 3 ou 4, caractérisé par le fait que la valeur de l'inductance (L) est choisie plus grande que l'inductance des deux enroulements (W1, W2).
HK77896A 1988-10-22 1996-05-02 Circuit for magnetic or magneto-optical recording of data on a recording medium HK77896A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3836125A DE3836125A1 (de) 1988-10-22 1988-10-22 Schaltungsanordnung zur umkehrung eines magnetfeldes

Publications (1)

Publication Number Publication Date
HK77896A true HK77896A (en) 1996-05-10

Family

ID=6365758

Family Applications (1)

Application Number Title Priority Date Filing Date
HK77896A HK77896A (en) 1988-10-22 1996-05-02 Circuit for magnetic or magneto-optical recording of data on a recording medium

Country Status (12)

Country Link
US (1) US5229902A (fr)
EP (1) EP0365891B1 (fr)
JP (1) JPH02198003A (fr)
KR (1) KR0149850B1 (fr)
CN (1) CN1015577B (fr)
AT (1) ATE122813T1 (fr)
DE (2) DE3836125A1 (fr)
DK (1) DK518489A (fr)
ES (1) ES2075025T3 (fr)
HK (1) HK77896A (fr)
HU (1) HUT53727A (fr)
MY (1) MY110012A (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3838858A1 (de) * 1988-11-17 1990-05-23 Thomson Brandt Gmbh Schaltungsanordnung zur umkehrung eines magnetfeldes
DE4022410A1 (de) * 1990-07-13 1992-01-16 Thomson Brandt Gmbh Schaltungsanordnung zur umkehrung eines magnetfeldes
JPH04181504A (ja) * 1990-11-16 1992-06-29 Canon Inc 磁気ヘッド駆動装置
US5402293A (en) * 1990-12-27 1995-03-28 Sony Electronics Inc. Magneto-optical head having a thin film coil recessed into a magnetic substrate
JP2795757B2 (ja) * 1991-06-21 1998-09-10 シャープ株式会社 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
JP2859766B2 (ja) * 1991-12-24 1999-02-24 シャープ株式会社 磁気ヘッド駆動回路
US5587851A (en) * 1991-12-24 1996-12-24 Sharp Kabushiki Kaisha Magnetic head driving device with prerecording energization
US5404342A (en) * 1992-01-16 1995-04-04 Sony Corporation Magnetic head device for magneto-optical disc system and magnetic head driving circuit
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
JP3211999B2 (ja) * 1992-06-26 2001-09-25 キヤノン株式会社 光磁気記録装置
DE4229538C2 (de) * 1992-09-04 2002-10-24 Bosch Gmbh Robert Schaltungsanordnung zur Ansteuerung eines elektromagnetischen Verbrauchers
JPH0729234A (ja) * 1993-07-07 1995-01-31 Sony Corp 光磁気記録再生装置
JP3107265B2 (ja) * 1993-08-06 2000-11-06 キヤノン株式会社 磁気ヘッド駆動装置及び磁気記録装置
US5953196A (en) * 1998-07-24 1999-09-14 Caterpillar Inc. Method and apparatus for an electromagnetic joystick lock with flux canceling driver circuit
JP2001023262A (ja) 1999-07-12 2001-01-26 Fujitsu Ltd 磁気ヘッドの巻線構造及び駆動回路
US7672091B2 (en) * 2006-03-15 2010-03-02 Seagate Technology Llc Reset device for biasing element in a magnetic sensor
KR102083484B1 (ko) 2018-09-20 2020-03-02 현대엘리베이터주식회사 점프 엘리베이터의 레일 리프팅 장치

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1209420B (de) * 1960-03-19 1966-01-20 Leitz Ernst Gmbh Schaltungsanordnung zur magnetischen Steuerung eines Jalousieverschlusses
DE1588178A1 (de) * 1967-10-25 1971-05-06 Olympia Buerosysteme Gmbh Schaltung zur Umpolung und Schnellerregung von Magneten
JPS57200960A (en) * 1981-06-04 1982-12-09 Pioneer Electronic Corp Recording and reproducing method and its device
DE3510620A1 (de) * 1984-02-20 1986-10-02 Olympus Optical Co., Ltd., Tokio/Tokyo Vorrichtung fuer die erzeugung eines magnetfelds bei einer aufzeichnungseinrichtung
JPH0619863B2 (ja) * 1984-06-13 1994-03-16 株式会社日立製作所 光磁気情報記憶方法及び装置
JPS6278704A (ja) * 1985-10-02 1987-04-11 Olympus Optical Co Ltd 磁界発生装置
JPH0739063Y2 (ja) * 1987-03-13 1995-09-06 グローリー工業株式会社 磁気及び光センサ
JPH0833974B2 (ja) * 1987-08-19 1996-03-29 ソニー株式会社 磁気ヘッド駆動回路
US4926403A (en) * 1987-09-10 1990-05-15 Teac Corporation Magneto-optic recording apparatus for recording information selectively on both sides of the recording medium

Also Published As

Publication number Publication date
MY110012A (en) 1997-11-29
US5229902A (en) 1993-07-20
ES2075025T3 (es) 1995-10-01
JPH02198003A (ja) 1990-08-06
KR0149850B1 (ko) 1999-04-15
ATE122813T1 (de) 1995-06-15
HU895389D0 (en) 1990-01-28
DE3836125A1 (de) 1990-05-03
CN1042264A (zh) 1990-05-16
KR900006950A (ko) 1990-05-09
HUT53727A (en) 1990-11-28
EP0365891B1 (fr) 1995-05-17
EP0365891A1 (fr) 1990-05-02
CN1015577B (zh) 1992-02-19
DK518489A (da) 1990-04-23
DE58909235D1 (de) 1995-06-22
DK518489D0 (da) 1989-10-19

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Legal Events

Date Code Title Description
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)