JPS5225607A - Rotary phase control system of magnetic disc memory - Google Patents

Rotary phase control system of magnetic disc memory

Info

Publication number
JPS5225607A
JPS5225607A JP50101754A JP10175475A JPS5225607A JP S5225607 A JPS5225607 A JP S5225607A JP 50101754 A JP50101754 A JP 50101754A JP 10175475 A JP10175475 A JP 10175475A JP S5225607 A JPS5225607 A JP S5225607A
Authority
JP
Japan
Prior art keywords
control system
phase control
magnetic disc
disc memory
rotary phase
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
JP50101754A
Other languages
Japanese (ja)
Inventor
Hiroshi Fujita
Hidekazu Tsuboka
Masatada Takebe
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 JP50101754A priority Critical patent/JPS5225607A/en
Publication of JPS5225607A publication Critical patent/JPS5225607A/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:By recording reproducing signal of even number times the frequency of TV horizontal synchronizing signal and functioning the servo-circuit, to raise the rotary preciseness of the disc.
JP50101754A 1975-08-21 1975-08-21 Rotary phase control system of magnetic disc memory Pending JPS5225607A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP50101754A JPS5225607A (en) 1975-08-21 1975-08-21 Rotary phase control system of magnetic disc memory

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50101754A JPS5225607A (en) 1975-08-21 1975-08-21 Rotary phase control system of magnetic disc memory

Publications (1)

Publication Number Publication Date
JPS5225607A true JPS5225607A (en) 1977-02-25

Family

ID=14309012

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50101754A Pending JPS5225607A (en) 1975-08-21 1975-08-21 Rotary phase control system of magnetic disc memory

Country Status (1)

Country Link
JP (1) JPS5225607A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60176376A (en) * 1984-02-22 1985-09-10 Nippon Kogaku Kk <Nikon> Reproducing servo circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3705262A (en) * 1970-12-31 1972-12-05 Westinghouse Electric Corp Synchronization method and apparatus for disc recorders

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3705262A (en) * 1970-12-31 1972-12-05 Westinghouse Electric Corp Synchronization method and apparatus for disc recorders

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60176376A (en) * 1984-02-22 1985-09-10 Nippon Kogaku Kk <Nikon> Reproducing servo circuit

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