HK8996A - Circuit arrangement for reversing a magnetic field - Google Patents

Circuit arrangement for reversing a magnetic field

Info

Publication number
HK8996A
HK8996A HK8996A HK8996A HK8996A HK 8996 A HK8996 A HK 8996A HK 8996 A HK8996 A HK 8996A HK 8996 A HK8996 A HK 8996A HK 8996 A HK8996 A HK 8996A
Authority
HK
Hong Kong
Prior art keywords
magnetic field
magneto
reversing
circuit arrangement
parallel
Prior art date
Application number
HK8996A
Inventor
Friedhelm Zucker
Original Assignee
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 Thomson Brandt Gmbh filed Critical Thomson Brandt Gmbh
Publication of HK8996A publication Critical patent/HK8996A/en

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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • G11B5/09—Digital recording

Abstract

Magneto-optical recording and reproducing devices have an electromagnet which reverses the magnetization of the magneto-optical layer of the magneto-optical disk in function of the bits to be stored. To ensure rapid and reliable reversal of the magnetic field, a capacitor (C), a series connection consisting of a diode (D1) and a first controllable switch (S1) and a series connection consisting of a coil (SP1) and a second controllable switch (S2) are connected in parallel and connected in parallel to a current source (Q). The controllable switches (S1, S2) are activated by a control circuit (G).
HK8996A 1990-07-13 1996-01-18 Circuit arrangement for reversing a magnetic field HK8996A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4022400A DE4022400A1 (en) 1990-07-13 1990-07-13 CIRCUIT ARRANGEMENT FOR REVERSING A MAGNETIC FIELD

Publications (1)

Publication Number Publication Date
HK8996A true HK8996A (en) 1996-01-26

Family

ID=6410256

Family Applications (1)

Application Number Title Priority Date Filing Date
HK8996A HK8996A (en) 1990-07-13 1996-01-18 Circuit arrangement for reversing a magnetic field

Country Status (8)

Country Link
EP (1) EP0539412B1 (en)
JP (1) JP3199730B2 (en)
KR (1) KR100239989B1 (en)
AT (1) ATE116467T1 (en)
DE (2) DE4022400A1 (en)
HK (1) HK8996A (en)
HU (1) HU216678B (en)
WO (1) WO1992001286A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5567550A (en) * 1993-03-25 1996-10-22 Texas Instruments Incorporated Method of making a mask for making integrated circuits

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3244904A (en) * 1962-10-12 1966-04-05 Gen Dynamics Corp Power pulse generator including choke coil with saturable core in charging circuit for rapid recharging
US3274610A (en) * 1963-03-21 1966-09-20 Bell Telephone Labor Inc Information recording circuit
US3337748A (en) * 1963-12-23 1967-08-22 Sanders Associates Inc Low dissipation inductance drivers
US3737735A (en) * 1972-02-04 1973-06-05 Minnesota Mining & Mfg Autotransformer assisted resonated energy transfer circuit
US3849670A (en) * 1973-04-13 1974-11-19 Webster Electric Co Inc Scr commutation circuit for current pulse generators
US4346340A (en) * 1980-04-30 1982-08-24 Hackett Jones Francis C Method and means for controlling the flux density in the core of an inductor
US4404476A (en) * 1981-09-24 1983-09-13 General Electric Company Pulse shaping and amplifying circuit
JPS60176320A (en) * 1984-02-22 1985-09-10 Hayashibara Takeshi Magnetic force line pulse generating device by series resonance
JPH0833974B2 (en) * 1987-08-19 1996-03-29 ソニー株式会社 Magnetic head drive circuit

Also Published As

Publication number Publication date
DE4022400A1 (en) 1992-01-16
HUT64637A (en) 1994-01-28
DE59104087D1 (en) 1995-02-09
ATE116467T1 (en) 1995-01-15
WO1992001286A1 (en) 1992-01-23
JPH05508957A (en) 1993-12-09
KR100239989B1 (en) 2000-02-01
EP0539412B1 (en) 1994-12-28
EP0539412A1 (en) 1993-05-05
JP3199730B2 (en) 2001-08-20
HU216678B (en) 1999-08-30
HU9203954D0 (en) 1993-03-29

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Legal Events

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

Effective date: 20080705