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JPS57120269A - Disk recording and reproducing device - Google Patents

Disk recording and reproducing device

Info

Publication number
JPS57120269A
JPS57120269A JP56192314A JP19231481A JPS57120269A JP S57120269 A JPS57120269 A JP S57120269A JP 56192314 A JP56192314 A JP 56192314A JP 19231481 A JP19231481 A JP 19231481A JP S57120269 A JPS57120269 A JP S57120269A
Authority
JP
Japan
Prior art keywords
signal
phase
constant
detection
reference period
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
JP56192314A
Other languages
Japanese (ja)
Other versions
JPS60837B2 (en
Inventor
Yuji Tsuyukuchi
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.)
Teac Corp
Original Assignee
Teac Corp
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 Teac Corp filed Critical Teac Corp
Priority to JP56192314A priority Critical patent/JPS60837B2/en
Publication of JPS57120269A publication Critical patent/JPS57120269A/en
Publication of JPS60837B2 publication Critical patent/JPS60837B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Rotational Drive Of Disk (AREA)

Abstract

PURPOSE: To achieve recording and reproduction while keeping constant in phase relation with a reference period signal by controlling a motor so that a detection signal showing the constant-angle position of a disk and the reference period signal are in phase, by making a phase comparision between both the signals.
CONSTITUTION: A detected part for the detection of a constant-angle position provided on a disk 11 is detected by a turning-angle detector 17, and a phase comparison control circuit 18 compares the phase of said detection signal with that of a reference period signal from a reference-period-signal generator 19 to exercise constant-speed control over a motor 15 so that both the signals are in phase. Further, a turning-angle detection signal is inputted to a beam displacement control circuit 31 to generate a track switching signal with a mode setting signal inputted from an instruction signal circuit 33. This signal controls a rotary mirror 28.
COPYRIGHT: (C)1982,JPO&Japio
JP56192314A 1981-11-30 1981-11-30 Disc recording or playback device Expired JPS60837B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56192314A JPS60837B2 (en) 1981-11-30 1981-11-30 Disc recording or playback device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56192314A JPS60837B2 (en) 1981-11-30 1981-11-30 Disc recording or playback device

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP5431476A Division JPS52137919A (en) 1976-05-14 1976-05-14 Disk recorder reproducer

Publications (2)

Publication Number Publication Date
JPS57120269A true JPS57120269A (en) 1982-07-27
JPS60837B2 JPS60837B2 (en) 1985-01-10

Family

ID=16289214

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56192314A Expired JPS60837B2 (en) 1981-11-30 1981-11-30 Disc recording or playback device

Country Status (1)

Country Link
JP (1) JPS60837B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6319981A (en) * 1986-07-14 1988-01-27 Teac Co video disc playback device
WO1995028704A1 (en) * 1994-04-18 1995-10-26 Matsushita Electric Industrial Co., Ltd. Method and apparatus for preventing illegal copying and illegal installation of information on optical recording medium
US5805551A (en) * 1994-04-18 1998-09-08 Matsushita Electric Industrial Co., Ltd. Method and apparatus for preventing illegal copy or illegal installation of information of optical recording medium
US5881038A (en) * 1994-04-18 1999-03-09 Matsushita Electric Industrial Co., Ltd. Method and apparatus for preventing illegal copy or illegal installation of information of optical recording medium

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6319981A (en) * 1986-07-14 1988-01-27 Teac Co video disc playback device
WO1995028704A1 (en) * 1994-04-18 1995-10-26 Matsushita Electric Industrial Co., Ltd. Method and apparatus for preventing illegal copying and illegal installation of information on optical recording medium
US5805551A (en) * 1994-04-18 1998-09-08 Matsushita Electric Industrial Co., Ltd. Method and apparatus for preventing illegal copy or illegal installation of information of optical recording medium
US5881038A (en) * 1994-04-18 1999-03-09 Matsushita Electric Industrial Co., Ltd. Method and apparatus for preventing illegal copy or illegal installation of information of optical recording medium

Also Published As

Publication number Publication date
JPS60837B2 (en) 1985-01-10

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