KR930004987A - 정보 재생 회로 - Google Patents

정보 재생 회로 Download PDF

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Publication number
KR930004987A
KR930004987A KR1019920013892A KR920013892A KR930004987A KR 930004987 A KR930004987 A KR 930004987A KR 1019920013892 A KR1019920013892 A KR 1019920013892A KR 920013892 A KR920013892 A KR 920013892A KR 930004987 A KR930004987 A KR 930004987A
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KR
South Korea
Prior art keywords
signal
circuit
level
generating
recording means
Prior art date
Application number
KR1019920013892A
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English (en)
Other versions
KR950014670B1 (ko
Inventor
히로시 후지
Original Assignee
쯔지 하루오
샤프 가부시끼가이샤
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.)
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Publication of KR930004987A publication Critical patent/KR930004987A/ko
Application granted granted Critical
Publication of KR950014670B1 publication Critical patent/KR950014670B1/ko

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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
    • G11B20/10—Digital recording or 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
    • G11B11/10502—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
    • G11B11/1053—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 to compensate for the magnetic domain drift or time shift
    • 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
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/01—Shaping pulses
    • H03K5/08—Shaping pulses by limiting; by thresholding; by slicing, i.e. combined limiting and thresholding
    • H03K5/082—Shaping pulses by limiting; by thresholding; by slicing, i.e. combined limiting and thresholding with an adaptive threshold
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/01—Shaping pulses
    • H03K5/08—Shaping pulses by limiting; by thresholding; by slicing, i.e. combined limiting and thresholding
    • H03K5/082—Shaping pulses by limiting; by thresholding; by slicing, i.e. combined limiting and thresholding with an adaptive threshold
    • H03K5/086—Shaping pulses by limiting; by thresholding; by slicing, i.e. combined limiting and thresholding with an adaptive threshold generated by feedback
    • 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

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Digital Magnetic Recording (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

내용 없음.

Description

정보 재생 회로
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도 내지 제7도는 본 발명의 제1실시예에 관한 것으로,
제1도는 광자기 기록 재생 장치의 정보 재생 회로의 주요부 구성을 도시하는 회로도,
제2도는 제1도의 자기 헤드의 코일을 포함하는 자기 헤드 구동회로의 등가회로도.

Claims (5)

  1. 기록 수단에 의해 정보가 기록된 기록 매체에서 독출된 신호를 2값화하는 정보 재생 회로에 있어서, 독출된 신호의 음의 피크 레벨보다 크고, 양의 피크레벨보다 작은 레벨의 슬라이스 신호를 생성하고 또 기록수단과 대략 동리한 전달 특성을 갖는 생성 수단과, 독출된 신호의 레벨 슬라이스 신호의 레벨을 비교하여 독출된 신호를 2값화하는 비교기를 구비하고, 기록 수단의 전달특성에 의해 생겨서 독출된 신호에 포함되는 지터를 생성수단의 전달 특성에 의해 생기는 슬라이스 신호의 레벨 변동에 의해 상쇄하는 것을 특징으로 하는 정보 재생회로.
  2. 제1항에 있어서, 상기 생성수단은 독출된 신호의 음의 피크 레벨보다 크고 양의 피크 레벨보다 작은 레벨의 신호를 생성하는 생성 회로와, 독출된 신호의 저주파수 대역을 필터링하여 기록 수단과 대략 동일한 전달 특성을 갖는 필터 화로와, 생성회로의 출력 신호에서 필터 회로의 출력 신호를 감산하여 슬라이스 신호를 출력하는 감산 회로로 구성되는 것을 특징으로 하는 정보 재생 회로.
  3. 제1항에 있어서, 상기 생성 수단은 독출된 신호와 음의 피크 레벨보다 크고 양의 피크 레벨보다 작은 레벨 신호를 생성하는 생성 회로와, 비교기 출력 신호의 저주파수 대역을 필터링하여 기록 수단과 대략 동일한 전달 특성을 갖는 필터 회로와, 생성 회로에서의 신호에서 필터 회로에서의 신호를 감산하여 슬라이스 신호를 출력하는 감산회로로 구성되는 것을 특징으로 하는 정보 재생 회로.
  4. 제2항 또는 제3항에 있어서, 필터 회로는 코일과 저항으로 이루어지는 저역통과 필터를 가지고, 저역 통과 필터가 기록 수단과 대략 동일 특성을 갖도록 코일의 인덕턴스값과 저하의 저항값이 세트되어 있는 것을 특징으로 하는 정보 재생 회로.
  5. 제1항내지 제3항중의 어느 한 항에 있어서, 상기 기록 수단은 자기 헤드의 코일을 포함하는 자기 헤드 구동 회로인 것을 특징으로 하는 정보 재생 회로.
    ※참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019920013892A 1991-08-02 1992-08-01 정보 재생 회로 KR950014670B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP3194349A JP2795758B2 (ja) 1991-08-02 1991-08-02 光磁気記録再生装置の情報再生回路
JP91-194349 1991-08-02

Publications (2)

Publication Number Publication Date
KR930004987A true KR930004987A (ko) 1993-03-23
KR950014670B1 KR950014670B1 (ko) 1995-12-13

Family

ID=16323108

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019920013892A KR950014670B1 (ko) 1991-08-02 1992-08-01 정보 재생 회로

Country Status (6)

Country Link
US (1) US5444688A (ko)
EP (1) EP0526841B1 (ko)
JP (1) JP2795758B2 (ko)
KR (1) KR950014670B1 (ko)
CA (1) CA2074691C (ko)
DE (1) DE69218692T2 (ko)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3350376B2 (ja) * 1996-11-25 2002-11-25 シャープ株式会社 波形整形回路およびそれを用いる赤外線データ通信装置
JPH11120564A (ja) * 1997-10-08 1999-04-30 Toshiba Corp 光ディスク装置及び光ディスク再生方法
KR100416594B1 (ko) * 2001-04-11 2004-02-05 삼성전자주식회사 디스크 구동기에 있어서 알에프 신호의 슬라이스 및슬라이스 레벨 보상 장치와 그 방법

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58175116A (ja) * 1982-04-07 1983-10-14 Nippon Columbia Co Ltd 信号検出回路
EP0096162B1 (en) * 1982-06-15 1986-06-18 Kabushiki Kaisha Toshiba Motor control circuit of data reproduction apparatus
JPH0680554B2 (ja) * 1985-02-08 1994-10-12 オリンパス光学工業株式会社 ２値化信号発生回路
JPS628305A (ja) * 1985-07-03 1987-01-16 Alps Electric Co Ltd 磁気記録再生装置
JPS6283671A (ja) * 1985-10-08 1987-04-17 Sharp Corp 信号検出回路
DE3770283D1 (de) * 1986-02-07 1991-07-04 Sharp Kk Optisches speichergeraet.
JPS62185277A (ja) * 1986-02-10 1987-08-13 Sharp Corp 光メモリ装置の信号検出回路
JPH0743805B2 (ja) * 1986-10-07 1995-05-15 ソニー株式会社 磁気ヘツド駆動回路
JPS6413658A (en) * 1987-07-07 1989-01-18 Yokogawa Electric Corp Dram access control device

Also Published As

Publication number Publication date
KR950014670B1 (ko) 1995-12-13
CA2074691C (en) 1996-09-17
JP2795758B2 (ja) 1998-09-10
DE69218692T2 (de) 1997-10-23
DE69218692D1 (de) 1997-05-07
EP0526841B1 (en) 1997-04-02
CA2074691A1 (en) 1993-02-03
JPH0540976A (ja) 1993-02-19
US5444688A (en) 1995-08-22
EP0526841A1 (en) 1993-02-10

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