JPS5771280A - Motor servo circuit - Google Patents

Motor servo circuit

Info

Publication number
JPS5771280A
JPS5771280A JP55146040A JP14604080A JPS5771280A JP S5771280 A JPS5771280 A JP S5771280A JP 55146040 A JP55146040 A JP 55146040A JP 14604080 A JP14604080 A JP 14604080A JP S5771280 A JPS5771280 A JP S5771280A
Authority
JP
Japan
Prior art keywords
during
reproduction
circuit
stable
frame synchronization
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
JP55146040A
Other languages
Japanese (ja)
Inventor
Yoshinobu Nishikawa
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
Sanyo Denki Co Ltd
Original Assignee
Sanyo Electric Co Ltd
Sanyo Denki 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, Sanyo Denki Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP55146040A priority Critical patent/JPS5771280A/en
Publication of JPS5771280A publication Critical patent/JPS5771280A/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
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing

Landscapes

  • Control Of Direct Current Motors (AREA)

Abstract

PURPOSE:To ensure a stable servo control during the reproduction by providing a circuit on a PCM type recording reproducer to automatically turn a switch circuit to the recording position when no frame synchronization signal is detected during the reproduction of record. CONSTITUTION:In operation of a PCM type recording reproducer, a signal of a frame synchronization detection circuit 37 is applied to a flip flop 44 through a one shot circuit 38 and the output thereof turns on a transistor 34 to change a contact 35a of a relay 35 over to the P position thereby controlling a motor 22. When no synchronization signal is generated, pulses with a respective width are outputted from second and third one-shot circuits 39 and 40. Only during the period, a relay contact 35a is turned to the servo position R during the recording with the output of the flip flop 44 at a level L. Therefore, the reproduction servo control is operated only when the frame synchronization signal is stable, thereby enabling a stable control.
JP55146040A 1980-10-17 1980-10-17 Motor servo circuit Pending JPS5771280A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55146040A JPS5771280A (en) 1980-10-17 1980-10-17 Motor servo circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55146040A JPS5771280A (en) 1980-10-17 1980-10-17 Motor servo circuit

Publications (1)

Publication Number Publication Date
JPS5771280A true JPS5771280A (en) 1982-05-04

Family

ID=15398740

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55146040A Pending JPS5771280A (en) 1980-10-17 1980-10-17 Motor servo circuit

Country Status (1)

Country Link
JP (1) JPS5771280A (en)

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