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KR840000017A - Information recording medium playback device - Google Patents

Information recording medium playback device Download PDF

Info

Publication number
KR840000017A
KR840000017A KR1019820002033A KR820002033A KR840000017A KR 840000017 A KR840000017 A KR 840000017A KR 1019820002033 A KR1019820002033 A KR 1019820002033A KR 820002033 A KR820002033 A KR 820002033A KR 840000017 A KR840000017 A KR 840000017A
Authority
KR
South Korea
Prior art keywords
circuit
recording medium
information recording
playback device
response
Prior art date
Application number
KR1019820002033A
Other languages
Korean (ko)
Inventor
이사오 마스다 (외 2)
Original Assignee
신지 이찌로
니뽕 빅터 가부시끼 가이샤
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 신지 이찌로, 니뽕 빅터 가부시끼 가이샤 filed Critical 신지 이찌로
Publication of KR840000017A publication Critical patent/KR840000017A/en

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
    • G11B5/09—Digital recording
    • 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
    • H03K12/00—Producing pulses by distorting or combining sinusoidal waveforms
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Digital Magnetic Recording (AREA)
  • Manipulation Of Pulses (AREA)

Abstract

내용 없음No content

Description

정보 기록 매체 재생장치Information recording medium playback device

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제2도 및 제3도는 각각 본 발명 장치의 제1 및 제2실시예의 요부 회로 계통도.2 and 3 are main circuit diagrams of the first and second embodiments of the present invention, respectively.

Claims (1)

정보 기록 매체로부터 이미 기록된 정보에 응한 주파수의 정현 파상신호를 얻고, 이 신호를 어떤 임계치 레벨에 의하여 이 신호에 응한 구형 파상신호로 변환하는 정보 기록 매체 재생장치에 있어서 이 구형 파상신호를 얻는 회로의 출력단자와 입력단자와의 사이에 회로의 출력 평균 직류 전압을 얻고 전압을 이 회로의 입력단자에 귀환시켜, 출력에 응한 임계치 레벨을 가변하는 회로를 설치하여 이루어진 것을 특징으로 하는 정보 기록 매체 재생장치.A circuit for obtaining a sinusoidal waveform signal of a frequency in response to information already recorded from the information recording medium and converting the signal into a rectangular waveform signal in response to the signal by a certain threshold level. Between an output terminal and an input terminal of the circuit, obtaining an output average DC voltage of the circuit, returning the voltage to the input terminal of the circuit, and providing a circuit for varying the threshold level in response to the output. Device. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019820002033A 1981-05-12 1982-05-10 Information recording medium playback device KR840000017A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP56070948A JPS57186216A (en) 1981-05-12 1981-05-12 Information recording medium reproducer
JP56-70948 1981-05-12

Publications (1)

Publication Number Publication Date
KR840000017A true KR840000017A (en) 1984-01-30

Family

ID=13446228

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019820002033A KR840000017A (en) 1981-05-12 1982-05-10 Information recording medium playback device

Country Status (5)

Country Link
JP (1) JPS57186216A (en)
KR (1) KR840000017A (en)
DE (1) DE3217482A1 (en)
FR (1) FR2506053A1 (en)
GB (1) GB2098379A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60123766U (en) * 1984-01-31 1985-08-21 パイオニア株式会社 Dropout detection circuit in recorded information reproducing device
JPS613372A (en) * 1984-06-15 1986-01-09 Fujitsu Ltd Demodulating circuit
JPH04212723A (en) * 1990-07-31 1992-08-04 Toshiba Corp Information recording and reproducing device
SG87796A1 (en) * 1991-05-10 2002-04-16 Discovision Ass Optical data storage and retrieval system including method for processing data on erasable optical disc
US5537379A (en) 1991-05-10 1996-07-16 Discovision Associates Optical data storage and retrieval system and method
US5894468A (en) * 1994-05-06 1999-04-13 Discovision Associates Data recovery with differentiation and partial integration stages to eliminate noises and DC offset level
US5790495A (en) 1994-05-06 1998-08-04 Discovision Associates Data generator assembly for retrieving stored data by comparing threshold signal with preprocessed signal having DC component

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3626209A (en) * 1970-04-06 1971-12-07 Electro Optical Ind Inc Square wave generating circuit
US3909728A (en) * 1973-02-16 1975-09-30 Contraves Ag Apparatus for generating a synchronization voltage for the ignition pulse control of controlled rectifier-power stages
JPS5369006A (en) * 1976-11-30 1978-06-20 Sony Corp Reproducer of disc form signal recording media
US4263555A (en) * 1979-06-15 1981-04-21 Rca Corporation Signal detection system

Also Published As

Publication number Publication date
DE3217482A1 (en) 1982-11-25
JPS57186216A (en) 1982-11-16
GB2098379A (en) 1982-11-17
FR2506053A1 (en) 1982-11-19

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Legal Events

Date Code Title Description
PA0109 Patent application

Patent event code: PA01091R01D

Comment text: Patent Application

Patent event date: 19820510

PA0201 Request for examination

Patent event code: PA02012R01D

Patent event date: 19840112

Comment text: Request for Examination of Application

Patent event code: PA02011R01I

Patent event date: 19820510

Comment text: Patent Application

PG1501 Laying open of application
PE0902 Notice of grounds for rejection

Comment text: Notification of reason for refusal

Patent event date: 19880222

Patent event code: PE09021S01D

PE0601 Decision on rejection of patent

Patent event date: 19880531

Comment text: Decision to Refuse Application

Patent event code: PE06012S01D

Patent event date: 19880222

Comment text: Notification of reason for refusal

Patent event code: PE06011S01I