ES2069064T3 - Circuito de conexion para inversion de un campo magnetico. - Google Patents

Circuito de conexion para inversion de un campo magnetico.

Info

Publication number
ES2069064T3
ES2069064T3 ES90900803T ES90900803T ES2069064T3 ES 2069064 T3 ES2069064 T3 ES 2069064T3 ES 90900803 T ES90900803 T ES 90900803T ES 90900803 T ES90900803 T ES 90900803T ES 2069064 T3 ES2069064 T3 ES 2069064T3
Authority
ES
Spain
Prior art keywords
pct
parallel
magnetic field
diode
oscillator
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 - Lifetime
Application number
ES90900803T
Other languages
English (en)
Inventor
Friedhelm Zucker
Christian Buchler
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.)
Deutsche Thomson Brandt GmbH
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
Application granted granted Critical
Publication of ES2069064T3 publication Critical patent/ES2069064T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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
    • 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
    • H03K17/662—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will connected to both load terminals each output circuit comprising more than one controlled bipolar transistor

Landscapes

  • Magnetic Resonance Imaging Apparatus (AREA)
  • Electronic Switches (AREA)
  • Magnetic Treatment Devices (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Magnetic Heads (AREA)
  • General Induction Heating (AREA)

Abstract

EN EQUIPOS DE GRABACION Y REPRODUCCION MAGNETO-OPTICOS SE HA PREVISTO UN ELECTROIMAN, PARA PODER INVERTIR LA MAGNETIZACION DE LA CAPA MAGNETO-OPTICA DEL DISCO MAGNETO-OPTICO EN FUNCION DE LOS BITS A MEMORIZAR. PARA PODER EFECTUAR UNA RAPIDA Y FIABLE INVERSION DEL CAMPO MAGNETICO SE HA PREVISTO UN CIRCUITO OSCILANTE A PARTIR DE UNA BOBINA (L) Y UNA CAPACIDAD (C), AL CUAL SE LE HA CONECTADO EN PARALELO UN CIRCUITO EN SERIE DE DOS DIODOS (D1,D2) CON UNA POLARIDAD CONTRAPUESTA. CADA DIODO (D1,D2) ES PUENTEABLE POR MEDIO DE UN INTERRUPTOR (S1,S2) CONTROLABLE. CADA CONEXION (A,B) DEL CIRCUITO OSCILANTE ESTA UNIDA CON UN POLO DE UNA FUENTE DE TENSION (+U), A TRAVES DE UNA CONEXION EN SERIE A PARTIR DE UNA RESISTENCIA (R1,R2) Y UN INTERRUPTOR (S3,S4) CONTROLABLE, CUYO OTRO POLO ESTA UNIDO CON EL PUNTO DE CONEXION COMUN DE AMBOS DIODOS (D1,D2). LAS DOS CONEXIONES (A,B) DEL CIRCUITO OSCILANTE, PUEDEN TAMBIEN ESTAR UNIDOS CON UNO DE LOS ELECTRODOS DE CADA DIODO (D3,D4), CUYO OTRO ELECTRODO ESTA UNIDOA TRAVES DE UN INTERRUPTOR (S3,S4) CON UNO DE LOS POLOS DE UNA FUENTE DE ALIMENTACION DE TENSION (-U), Y A TRAVES DE UN CIRCUITO EN SERIE A PARTIR DE UNA INDUCTIVIDAD (L2,L3) Y UNA RESISTENCIA (R1,R2), CON EL OTRO POLO DE LA FUENTE DE ALIMENTACION DE TENSION (-U). UN CIRCUITO DE MANIOBRA (S), CONTROLA LOS INTERRUPTORES (S1-S4) CONTROLABLES DE TAL MODO QUE, SE LE SUMINISTRA ENERGIA AL CIRCUITO OSCILANTE, SI LA CARGA DE LA CAPACIDAD (C) ES INVERTIDA. APARATOS DE REPRODUCCION MAGNETICA Y MAGNETOOPTICOS.
ES90900803T 1988-11-17 1989-11-17 Circuito de conexion para inversion de un campo magnetico. Expired - Lifetime ES2069064T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3838858A DE3838858A1 (de) 1988-11-17 1988-11-17 Schaltungsanordnung zur umkehrung eines magnetfeldes

Publications (1)

Publication Number Publication Date
ES2069064T3 true ES2069064T3 (es) 1995-05-01

Family

ID=6367318

Family Applications (1)

Application Number Title Priority Date Filing Date
ES90900803T Expired - Lifetime ES2069064T3 (es) 1988-11-17 1989-11-17 Circuito de conexion para inversion de un campo magnetico.

Country Status (13)

Country Link
US (1) US5278818A (es)
EP (1) EP0561775B1 (es)
JP (1) JP3016854B2 (es)
KR (1) KR0169119B1 (es)
CN (1) CN1023921C (es)
AT (1) ATE118637T1 (es)
AU (1) AU4666989A (es)
DE (2) DE3838858A1 (es)
ES (1) ES2069064T3 (es)
HK (1) HK16296A (es)
HU (1) HUT58159A (es)
MY (1) MY104478A (es)
WO (1) WO1990005980A1 (es)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04181504A (ja) * 1990-11-16 1992-06-29 Canon Inc 磁気ヘッド駆動装置
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
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
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
JP3211999B2 (ja) * 1992-06-26 2001-09-25 キヤノン株式会社 光磁気記録装置
US5666333A (en) * 1995-04-07 1997-09-09 Discovision Associates Biasing level controller for magneto-optical recording device
JP2002230799A (ja) * 2001-02-05 2002-08-16 Funai Electric Co Ltd アクチュエータ回路
KR101285110B1 (ko) 2012-02-08 2013-07-17 김종훈 에코 힐링 저주파 자계 생성 장치
US10357144B2 (en) 2013-03-14 2019-07-23 Given Imaging Ltd. Method and circuit for muting electromagnetic interference during maneuvering of a device

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2972710A (en) * 1959-04-03 1961-02-21 Sperry Rand Corp Inductive load transistor bridge switching circuit
US3400304A (en) * 1966-02-25 1968-09-03 Raytheon Co Current reversing circuit
US3602739A (en) * 1969-04-16 1971-08-31 Westinghouse Electric Corp Digital magnetic recording circuit bidirectional load switching having higher load voltage at time of reversal
GB1376083A (en) * 1972-01-31 1974-12-04 Hofmann U Circuit arrangement for recording binary signals on magnetisable storage media
US3770986A (en) * 1972-04-20 1973-11-06 Hewlett Packard Co Switching circuit for inductive loads
JPS552844B2 (es) * 1975-02-12 1980-01-22
GB8530930D0 (en) * 1985-12-16 1986-01-29 Mansfield P Inductive circuit arrangements
JPH0833974B2 (ja) * 1987-08-19 1996-03-29 ソニー株式会社 磁気ヘッド駆動回路
EP0312143B1 (en) * 1987-10-14 1993-08-18 Koninklijke Philips Electronics N.V. Magneto-optical recording apparatus and energizing circuit for use in such a magneto-optical recording apparatus
DE3836125A1 (de) * 1988-10-22 1990-05-03 Thomson Brandt Gmbh Schaltungsanordnung zur umkehrung eines magnetfeldes
DE3907057A1 (de) * 1989-03-04 1990-09-13 Thomson Brandt Gmbh Schaltungsanordnung zur umkehrung eines magnetfeldes

Also Published As

Publication number Publication date
AU4666989A (en) 1990-06-12
CN1023921C (zh) 1994-03-02
DE58909015D1 (de) 1995-03-23
CN1043035A (zh) 1990-06-13
WO1990005980A1 (de) 1990-05-31
US5278818A (en) 1994-01-11
KR0169119B1 (ko) 1999-03-20
KR900702522A (ko) 1990-12-07
MY104478A (en) 1994-04-30
HU900494D0 (en) 1991-08-28
JP3016854B2 (ja) 2000-03-06
EP0561775A1 (en) 1993-09-29
ATE118637T1 (de) 1995-03-15
HK16296A (en) 1996-02-02
JPH04501781A (ja) 1992-03-26
HUT58159A (en) 1992-01-28
EP0561775B1 (de) 1995-02-15
DE3838858A1 (de) 1990-05-23

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