JPS5619558A - Information recording and reproducing unit of disc shape - Google Patents

Information recording and reproducing unit of disc shape

Info

Publication number
JPS5619558A
JPS5619558A JP9521179A JP9521179A JPS5619558A JP S5619558 A JPS5619558 A JP S5619558A JP 9521179 A JP9521179 A JP 9521179A JP 9521179 A JP9521179 A JP 9521179A JP S5619558 A JPS5619558 A JP S5619558A
Authority
JP
Japan
Prior art keywords
recording
signal
phase
synchronizing signal
vertical synchronizing
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.)
Pending
Application number
JP9521179A
Other languages
Japanese (ja)
Inventor
Masahiro Deguchi
Noboru Wakami
Mitsuro Moriya
Yasuhiro Goto
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP9521179A priority Critical patent/JPS5619558A/en
Publication of JPS5619558A publication Critical patent/JPS5619558A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • G11B19/28—Speed controlling, regulating, or indicating

Landscapes

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

Abstract

PURPOSE:To enable the recording position of vertical synchronizing signal is at a given phase location on all the recording trackes independently of the loading and unloading of the recording medium, by detecting the phase difference between the output signal of the rotating position detecting means and the signal relating to the synchronizing signal in the recording signal and controlling the rotating body. CONSTITUTION:The recording object 1' fitted with the light-absorbing substance 28 as marker on the nonrecording surface 1b' is placed on the turn table to detect the rotating phase of the recording medium 1' with the fine light source 26 and the detector 27. This detection signal is fed to the phase comparator 24 and the vertical synchronizing signal of the recording video signal fed to the terminal 8 is separated, it is in phase comparison with the output of the vertical synchronizing signal separation and frequency division circuit 23 the frequency of which is divided by 2, and the phase comparison error signal is fed to the drive control circuit 25 to cotrol the motor 6. Accordingly, even if recording is made with the recording medium 1' loaded or unloaded, the recording position of the vertical synchronizing signal is made constant independently of the loading and unloading position to the turn table 7.
JP9521179A 1979-07-25 1979-07-25 Information recording and reproducing unit of disc shape Pending JPS5619558A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9521179A JPS5619558A (en) 1979-07-25 1979-07-25 Information recording and reproducing unit of disc shape

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9521179A JPS5619558A (en) 1979-07-25 1979-07-25 Information recording and reproducing unit of disc shape

Publications (1)

Publication Number Publication Date
JPS5619558A true JPS5619558A (en) 1981-02-24

Family

ID=14131408

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9521179A Pending JPS5619558A (en) 1979-07-25 1979-07-25 Information recording and reproducing unit of disc shape

Country Status (1)

Country Link
JP (1) JPS5619558A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5897136A (en) * 1981-12-04 1983-06-09 Matsushita Electric Ind Co Ltd Optical recorder
JPS63311883A (en) * 1987-06-12 1988-12-20 Matsushita Electric Ind Co Ltd Burglar-proof camera device
JPS6439631A (en) * 1987-08-06 1989-02-09 Sony Corp Disk-shaped medium recorder

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5225606A (en) * 1975-08-21 1977-02-25 Matsushita Electric Ind Co Ltd Rotary phase control system of magnetic disc memory
JPS5229105B2 (en) * 1974-04-24 1977-07-30
JPS5366718A (en) * 1976-11-27 1978-06-14 Matsushita Electric Ind Co Ltd Floppy disk recording system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5229105B2 (en) * 1974-04-24 1977-07-30
JPS5225606A (en) * 1975-08-21 1977-02-25 Matsushita Electric Ind Co Ltd Rotary phase control system of magnetic disc memory
JPS5366718A (en) * 1976-11-27 1978-06-14 Matsushita Electric Ind Co Ltd Floppy disk recording system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5897136A (en) * 1981-12-04 1983-06-09 Matsushita Electric Ind Co Ltd Optical recorder
JPH0527308B2 (en) * 1981-12-04 1993-04-20 Matsushita Electric Ind Co Ltd
JPS63311883A (en) * 1987-06-12 1988-12-20 Matsushita Electric Ind Co Ltd Burglar-proof camera device
JPS6439631A (en) * 1987-08-06 1989-02-09 Sony Corp Disk-shaped medium recorder

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