JPS5661065A - Record player - Google Patents

Record player

Info

Publication number
JPS5661065A
JPS5661065A JP13554379A JP13554379A JPS5661065A JP S5661065 A JPS5661065 A JP S5661065A JP 13554379 A JP13554379 A JP 13554379A JP 13554379 A JP13554379 A JP 13554379A JP S5661065 A JPS5661065 A JP S5661065A
Authority
JP
Japan
Prior art keywords
output
signal
speed signal
rotating speed
detected
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
JP13554379A
Other languages
Japanese (ja)
Inventor
Isao Akita
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric 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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP13554379A priority Critical patent/JPS5661065A/en
Publication of JPS5661065A publication Critical patent/JPS5661065A/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)

Abstract

PURPOSE:To make easy accurate adjustment of the rotating speed of a turn table, by detecting the rotating speed of the turn table, comparing the detected speed signal with the reference speed signal by a phase comparator, converting the output phase difference signal into a voltage and controlling the illumination of the display element of a level indicator. CONSTITUTION:When a turn table rotates with the drive of a motor, the detected speed signal in proportional to the rotating speed of the motor is output from a frequency generator 4 and it is input to a phase comparator 6 via a waveform rectifier 5. On the other hand, the reference speed signal obtained through the frequency division of the output signal of a reference oscillator is input to the comparator 6 and the phase difference with the detected signal is compared. If the phase of the detected speed signal advances to that of the reference speed signal, the phase difference signal is output from an output terminal 01 and if delayed, then from a terminal 02. The output is compared with the reference voltage 10 at comparators 9, 11 via LPFs 7, 8, allowing to illuminate a plurality of elements of a display device 12 according to the output level. Accordingly, accurate adjustment of the rotating speed can be made easy.
JP13554379A 1979-10-20 1979-10-20 Record player Pending JPS5661065A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13554379A JPS5661065A (en) 1979-10-20 1979-10-20 Record player

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13554379A JPS5661065A (en) 1979-10-20 1979-10-20 Record player

Publications (1)

Publication Number Publication Date
JPS5661065A true JPS5661065A (en) 1981-05-26

Family

ID=15154232

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13554379A Pending JPS5661065A (en) 1979-10-20 1979-10-20 Record player

Country Status (1)

Country Link
JP (1) JPS5661065A (en)

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