JPS5718057A - Disc playback device - Google Patents

Disc playback device

Info

Publication number
JPS5718057A
JPS5718057A JP9274880A JP9274880A JPS5718057A JP S5718057 A JPS5718057 A JP S5718057A JP 9274880 A JP9274880 A JP 9274880A JP 9274880 A JP9274880 A JP 9274880A JP S5718057 A JPS5718057 A JP S5718057A
Authority
JP
Japan
Prior art keywords
pickup
motor
counter
rotation
playback device
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
JP9274880A
Other languages
Japanese (ja)
Inventor
Hiroyuki Kimura
Yasunori Kanazawa
Shinichi Ohashi
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP9274880A priority Critical patent/JPS5718057A/en
Publication of JPS5718057A publication Critical patent/JPS5718057A/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
    • G11B19/24—Arrangements for providing constant relative speed between record carrier and head

Landscapes

  • Moving Of Head For Track Selection And Changing (AREA)
  • Rotational Drive Of Disk (AREA)

Abstract

PURPOSE:To detect the position of a pickup for the control of number of revolutions, by providing an F.G. (frequency generator) detecting the position of rotation of a motor shaft and generating a signal. CONSTITUTION:After a motor 1 rotates, a pickup 5 moves and reaches the outermost circumference of a disc, then an FF13 is set with the output of a sensor 14 and a counter 16 starts counting operation. When a pickup motor 11 turns and the pickup 5 is moved to the inner circumference, a pulse proportional to the rotation of the motor 11 is counted 16, and the content of the counter 16 is in D/A conversion 17 and a voltage proportional to the pickup feeding is generated.
JP9274880A 1980-07-09 1980-07-09 Disc playback device Pending JPS5718057A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9274880A JPS5718057A (en) 1980-07-09 1980-07-09 Disc playback device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9274880A JPS5718057A (en) 1980-07-09 1980-07-09 Disc playback device

Publications (1)

Publication Number Publication Date
JPS5718057A true JPS5718057A (en) 1982-01-29

Family

ID=14063030

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9274880A Pending JPS5718057A (en) 1980-07-09 1980-07-09 Disc playback device

Country Status (1)

Country Link
JP (1) JPS5718057A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58207884A (en) * 1982-05-25 1983-12-03 Sanyo Electric Co Ltd Speed control circuit for motor
JPS58207885A (en) * 1982-05-25 1983-12-03 Sanyo Electric Co Ltd Speed control circuit for motor
JPS61289582A (en) * 1985-06-14 1986-12-19 Sanyo Electric Co Ltd Rotation controlling device for discoid recording medium
JPS62258255A (en) * 1986-05-02 1987-11-10 Nissan Motor Co Ltd Toroidal continuously variable transmission

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58207884A (en) * 1982-05-25 1983-12-03 Sanyo Electric Co Ltd Speed control circuit for motor
JPS58207885A (en) * 1982-05-25 1983-12-03 Sanyo Electric Co Ltd Speed control circuit for motor
JPS61289582A (en) * 1985-06-14 1986-12-19 Sanyo Electric Co Ltd Rotation controlling device for discoid recording medium
JPS62258255A (en) * 1986-05-02 1987-11-10 Nissan Motor Co Ltd Toroidal continuously variable transmission

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