JPS5720967A - Reproducing device for recording disk - Google Patents

Reproducing device for recording disk

Info

Publication number
JPS5720967A
JPS5720967A JP3011581A JP3011581A JPS5720967A JP S5720967 A JPS5720967 A JP S5720967A JP 3011581 A JP3011581 A JP 3011581A JP 3011581 A JP3011581 A JP 3011581A JP S5720967 A JPS5720967 A JP S5720967A
Authority
JP
Japan
Prior art keywords
output
record disk
rotation
arm
hpf13
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
JP3011581A
Other languages
Japanese (ja)
Other versions
JPS5727536B2 (en
Inventor
Masaaki Sakai
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP3011581A priority Critical patent/JPS5720967A/en
Publication of JPS5720967A publication Critical patent/JPS5720967A/en
Publication of JPS5727536B2 publication Critical patent/JPS5727536B2/ja
Granted 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
    • G11B19/24—Arrangements for providing constant relative speed between record carrier and head

Landscapes

  • Rotational Drive Of Disk (AREA)

Abstract

PURPOSE:To eliminate irregularity of rotation due to eccentricity by detecting variations of rotation of an arm tracing the spiral groove of a record disk, and by turning the record disk by increasing the detection output according to a trace from the outer circumference to the inner circumgerence. CONSTITUTION:The variation of the turning angle of a pickup arm 5, tracing the spiral recording groove of a record disk 4, for the single rotation of the record disk is detected by a detecting means 10. The detecting means 10 is constituted as a variable capacitor by fitting a metallic plate 10a as a rotor and further fitting a metallic plate 10b as a stator to a fixed member. The output of the means 10 is frequency-discriminated 12 by varying the oscillation frequency of an oscillator 11 and applied to an HPF13 and an LPF14. The output of the HPF13 is supplied to an adding circuit 16 via a variable gain amplifier 15 and the output of the LPF14, on the other hand, increases the gain of the amplifier 15 as the arm moves from the outer circumference to the inner circumference of the record disk 4. The output of a reference signal generator 17 and that of addition 16 are used for servocontrol over the speed of a motor 20, thus eliminating irregularity of rotation.
JP3011581A 1981-03-03 1981-03-03 Reproducing device for recording disk Granted JPS5720967A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3011581A JPS5720967A (en) 1981-03-03 1981-03-03 Reproducing device for recording disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3011581A JPS5720967A (en) 1981-03-03 1981-03-03 Reproducing device for recording disk

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP731723A Division JPS5752659B2 (en) 1972-12-28 1972-12-28

Publications (2)

Publication Number Publication Date
JPS5720967A true JPS5720967A (en) 1982-02-03
JPS5727536B2 JPS5727536B2 (en) 1982-06-11

Family

ID=12294777

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3011581A Granted JPS5720967A (en) 1981-03-03 1981-03-03 Reproducing device for recording disk

Country Status (1)

Country Link
JP (1) JPS5720967A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0223879Y2 (en) * 1985-06-14 1990-06-29

Also Published As

Publication number Publication date
JPS5727536B2 (en) 1982-06-11

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