JPS5755563A - Disk reproducer - Google Patents

Disk reproducer

Info

Publication number
JPS5755563A
JPS5755563A JP13092380A JP13092380A JPS5755563A JP S5755563 A JPS5755563 A JP S5755563A JP 13092380 A JP13092380 A JP 13092380A JP 13092380 A JP13092380 A JP 13092380A JP S5755563 A JPS5755563 A JP S5755563A
Authority
JP
Japan
Prior art keywords
disk
revolutions
pickup
motor
synchronous signal
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
JP13092380A
Other languages
Japanese (ja)
Inventor
Ryoichi Imanaka
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 JP13092380A priority Critical patent/JPS5755563A/en
Publication of JPS5755563A publication Critical patent/JPS5755563A/en
Pending legal-status Critical Current

Links

Landscapes

  • Rotational Drive Of Disk (AREA)

Abstract

PURPOSE: To discriminate the type of a disk, by extracting a synchronous signal before a pickup reaches the most inner circumference of a disk to control a motor to a prescribed number of revolutions, then using the difference of the numbers of revolutions.
CONSTITUTION: While a pickup 4 moves to the inner circumference from the most outer circumference of a disk, the track is traced by a tracking servo motor. Thus a synchronous signal is detected, and the servo system of the number of revolutions of a motor 2 is actuated. As the speed of the linear shift of a pickup 4 is sufficiently low compared with the speed of revolution a disk 1, the servo lead-in is made possible from the detection of the synchronous signal in a short time by the power of the tracking servo motor. In this case, the DC level of the output of an F/V converter 11 has a large amount of difference to enable the device to discriminate the type of the disk.
COPYRIGHT: (C)1982,JPO&Japio
JP13092380A 1980-09-19 1980-09-19 Disk reproducer Pending JPS5755563A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13092380A JPS5755563A (en) 1980-09-19 1980-09-19 Disk reproducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13092380A JPS5755563A (en) 1980-09-19 1980-09-19 Disk reproducer

Publications (1)

Publication Number Publication Date
JPS5755563A true JPS5755563A (en) 1982-04-02

Family

ID=15045888

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13092380A Pending JPS5755563A (en) 1980-09-19 1980-09-19 Disk reproducer

Country Status (1)

Country Link
JP (1) JPS5755563A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4866695A (en) * 1986-09-24 1989-09-12 Hitachi, Ltd. Access control system for rotating an information storage disc at a constant linear velocity

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4866695A (en) * 1986-09-24 1989-09-12 Hitachi, Ltd. Access control system for rotating an information storage disc at a constant linear velocity

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