CA2026202A1 - Appareil de lecture de supports d'information magneto-optiques - Google Patents

Appareil de lecture de supports d'information magneto-optiques

Info

Publication number
CA2026202A1
CA2026202A1 CA 2026202 CA2026202A CA2026202A1 CA 2026202 A1 CA2026202 A1 CA 2026202A1 CA 2026202 CA2026202 CA 2026202 CA 2026202 A CA2026202 A CA 2026202A CA 2026202 A1 CA2026202 A1 CA 2026202A1
Authority
CA
Canada
Prior art keywords
differential
gain control
automatic gain
magneto
storage medium
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.)
Granted
Application number
CA 2026202
Other languages
English (en)
Other versions
CA2026202C (fr
Inventor
Hiroshi Fuji
Toshihisa Deguchi
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.)
Sharp Corp
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2026202A1 publication Critical patent/CA2026202A1/fr
Application granted granted Critical
Publication of CA2026202C publication Critical patent/CA2026202C/fr
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
    • G11B11/10515—Reproducing
    • 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
    • G11B11/10595—Control of operating function
    • G11B11/10597—Adaptations for transducing various formats on the same or different carriers
CA 2026202 1989-09-26 1990-09-25 Appareil de lecture de supports d'information magneto-optiques Expired - Fee Related CA2026202C (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1250290A JP2886200B2 (ja) 1989-09-26 1989-09-26 光磁気記録再生装置
JP1-250290 1989-09-26

Publications (2)

Publication Number Publication Date
CA2026202A1 true CA2026202A1 (fr) 1991-03-27
CA2026202C CA2026202C (fr) 1996-08-27

Family

ID=17205708

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2026202 Expired - Fee Related CA2026202C (fr) 1989-09-26 1990-09-25 Appareil de lecture de supports d'information magneto-optiques

Country Status (4)

Country Link
EP (1) EP0420591B1 (fr)
JP (1) JP2886200B2 (fr)
CA (1) CA2026202C (fr)
DE (1) DE69026894T2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0599387B1 (fr) * 1992-11-20 1998-05-13 Koninklijke Philips Electronics N.V. Dispositif de lecture/écriture magnétooptique
JPH07130092A (ja) * 1993-11-05 1995-05-19 Sony Corp ディスク記録装置、ディスク再生装置およびディスク状記録媒体
KR100524949B1 (ko) * 2003-02-27 2005-11-01 삼성전자주식회사 광디스크의 배속에 따라 증폭이득을 제어하는 광신호변환장치 및 그의 증폭이득 제어방법

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4691308A (en) * 1984-04-19 1987-09-01 Nippon Kogaku K. K. Apparatus for reproducing information from magnetooptical recording medium
JP2516926B2 (ja) * 1986-07-18 1996-07-24 シャープ株式会社 磁気光学ヘツド
US4847824A (en) * 1987-12-21 1989-07-11 International Business Machines Corporation Readback circuits for magnetooptic players
US4910479A (en) * 1988-01-22 1990-03-20 Sharp Kabushiki Kaisha Automatic gain control device for use in an optical memory device

Also Published As

Publication number Publication date
EP0420591A2 (fr) 1991-04-03
CA2026202C (fr) 1996-08-27
JP2886200B2 (ja) 1999-04-26
JPH03113855A (ja) 1991-05-15
EP0420591A3 (en) 1992-04-15
DE69026894D1 (de) 1996-06-13
EP0420591B1 (fr) 1996-05-08
DE69026894T2 (de) 1996-11-14

Similar Documents

Publication Publication Date Title
CA2025121A1 (fr) Dispositif d'enregistrement et de lecture d'informations
JPH02118322U (fr)
MY130581A (en) Write once optical disc recording apparatus
EP0255036A3 (en) Recorded data reproducing apparatus
CA2027153A1 (fr) Dispositif d'enregistrement et de lecture optique complenant des fonctions de controle dependantes d'un controle de gain automatique
CA2067564A1 (fr) Appareil d'enregistrement et de lecture d'informations
US4729041A (en) Information reproducing device with dynamic drop-out compensation inhibiting means
CA2026202A1 (fr) Appareil de lecture de supports d'information magneto-optiques
JPS54136806A (en) Recording medium for reproduction and reproducer utilizing this recording medium
ES8604381A1 (es) Un sistema de reproduccion de sonido
CA2074546A1 (fr) Appareil d'enregistrement-lecture a disque magneto-optique
EP0282209A3 (fr) Dispositif de reproduction de données
ES8309026A1 (es) "un metodo para registrar o reproducir informacion, especificamente una informacion estereofonica".
JPS63146363U (fr)
JPS6425356A (en) Agc gain control circuit for optical recording and reproducing device
JPS5675730A (en) Information recording and reproducing system
TW428167B (en) Magnetic data reproducing device
EP0312404A3 (fr) Appareil et méthode pour améliorer la qualité de l'enregistrement audio sur un disque magnétique
JPS6414772A (en) Rf signal processing circuit
JPS5999591U (ja) ビデオテ−プレコ−ダ用自動カラ−レベル制御回路
JPS55146677A (en) Automatic regulating circuit for reproduced sound of automatic piano player
SU1644212A1 (ru) Способ записи-воспроизведени аналоговых сигналов на движущийс носитель и устройство дл его осуществлени
JPS563414A (en) Sound recorder/reproducer
JPS6277915U (fr)
JPS5562509A (en) Sound recording and reproducing system of tape recorder

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed