KR950013705B1 - Fm 변조기와 자기 헤드 구동 회로를 겸용한 자계 변조 광자기 기록 장치 - Google Patents

Fm 변조기와 자기 헤드 구동 회로를 겸용한 자계 변조 광자기 기록 장치 Download PDF

Info

Publication number
KR950013705B1
KR950013705B1 KR1019920012194A KR920012194A KR950013705B1 KR 950013705 B1 KR950013705 B1 KR 950013705B1 KR 1019920012194 A KR1019920012194 A KR 1019920012194A KR 920012194 A KR920012194 A KR 920012194A KR 950013705 B1 KR950013705 B1 KR 950013705B1
Authority
KR
South Korea
Prior art keywords
magnetic head
signal
magneto
current
modulated
Prior art date
Application number
KR1019920012194A
Other languages
English (en)
Korean (ko)
Other versions
KR930003053A (ko
Inventor
히로시 후지
Original Assignee
샤프 가부시끼가이샤
쯔지 하루오
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 샤프 가부시끼가이샤, 쯔지 하루오 filed Critical 샤프 가부시끼가이샤
Publication of KR930003053A publication Critical patent/KR930003053A/ko
Application granted granted Critical
Publication of KR950013705B1 publication Critical patent/KR950013705B1/ko

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
    • G11B11/10526—Bulk initialisation or erasing, e.g. at least one whole information track with a single action
    • 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
KR1019920012194A 1991-07-10 1992-07-09 Fm 변조기와 자기 헤드 구동 회로를 겸용한 자계 변조 광자기 기록 장치 KR950013705B1 (ko)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP16989491 1991-07-10
JP91-169894 1991-07-10
JP92-43639 1992-02-28
JP4043639A JP2795768B2 (ja) 1991-07-10 1992-02-28 磁界変調光磁気記録装置

Publications (2)

Publication Number Publication Date
KR930003053A KR930003053A (ko) 1993-02-23
KR950013705B1 true KR950013705B1 (ko) 1995-11-13

Family

ID=15894939

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019920012194A KR950013705B1 (ko) 1991-07-10 1992-07-09 Fm 변조기와 자기 헤드 구동 회로를 겸용한 자계 변조 광자기 기록 장치

Country Status (2)

Country Link
JP (1) JP2795768B2 (ja)
KR (1) KR950013705B1 (ja)

Also Published As

Publication number Publication date
KR930003053A (ko) 1993-02-23
JP2795768B2 (ja) 1998-09-10
JPH0567357A (ja) 1993-03-19

Similar Documents

Publication Publication Date Title
US5134607A (en) Optical memory system for generating a timing control signal for detecting a recorded region through a playback signal
EP0522543B1 (en) A magnetic field modulation magnet-optical recording apparatus in which an FM modulator and a magnetic head driving circuit are used in common
JP2528821B2 (ja) 光情報処理装置
KR950013705B1 (ko) Fm 변조기와 자기 헤드 구동 회로를 겸용한 자계 변조 광자기 기록 장치
US5970026A (en) Temperature invariant, magneto-optic modulator coil driving circuit
JP2846175B2 (ja) 情報記憶装置
JP3036240B2 (ja) 情報の記録再生制御方法
KR900002266A (ko) 자기광 정보기록 재생장치의 외부자계장치
JP2638465B2 (ja) 光学的情報記録再生方法
JPH07121803A (ja) 光磁気記録用変調磁界発生装置および光磁気記録装置
JPH03238602A (ja) 光磁気ディスクドライブ装置の印加磁界発生用電磁石駆動回路およびその駆動方法
JP3042093B2 (ja) レーザ駆動回路
JP2576625B2 (ja) 光磁気オーバライト装置
EP0557094A1 (en) Magnetic head drive device
JP2576623B2 (ja) 光磁気オーバライト装置
JPH04121801A (ja) 光磁気記録装置の磁界変調方式
KR100280878B1 (ko) 광자기 기록매체상의 데이터 재생방법 및 장치
KR0118024Y1 (ko) 광자기 디스크의 중복 기록장치
JPH03266201A (ja) 情報記録再生装置
JPH07129988A (ja) 半導体レーザー駆動回路
JPS6398841A (ja) 記録電流制御装置
JPH02122436A (ja) 光記録再生装置
JPH0312006A (ja) 光磁気オーバライト方式
JPH04219653A (ja) 光磁気記録再生装置
JPH04245044A (ja) 光磁気記録媒体の記録方法および装置

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
G160 Decision to publish patent application
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20081110

Year of fee payment: 14

LAPS Lapse due to unpaid annual fee