JPS5251918A - Constant revolution detecting circuit for magnetic discs - Google Patents

Constant revolution detecting circuit for magnetic discs

Info

Publication number
JPS5251918A
JPS5251918A JP12744075A JP12744075A JPS5251918A JP S5251918 A JPS5251918 A JP S5251918A JP 12744075 A JP12744075 A JP 12744075A JP 12744075 A JP12744075 A JP 12744075A JP S5251918 A JPS5251918 A JP S5251918A
Authority
JP
Japan
Prior art keywords
detecting circuit
magnetic discs
revolution detecting
constant revolution
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
JP12744075A
Other languages
Japanese (ja)
Inventor
Masami Tamura
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 JP12744075A priority Critical patent/JPS5251918A/en
Publication of JPS5251918A publication Critical patent/JPS5251918A/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

  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
  • Rotational Drive Of Disk (AREA)

Abstract

PURPOSE:Revolving speeds of a magnetic disc is detected, whereby the attainment of steady revolution after the disc continues steady revolution is detected and a disk ready signal is transmitted.
JP12744075A 1975-10-24 1975-10-24 Constant revolution detecting circuit for magnetic discs Pending JPS5251918A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12744075A JPS5251918A (en) 1975-10-24 1975-10-24 Constant revolution detecting circuit for magnetic discs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12744075A JPS5251918A (en) 1975-10-24 1975-10-24 Constant revolution detecting circuit for magnetic discs

Publications (1)

Publication Number Publication Date
JPS5251918A true JPS5251918A (en) 1977-04-26

Family

ID=14959989

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12744075A Pending JPS5251918A (en) 1975-10-24 1975-10-24 Constant revolution detecting circuit for magnetic discs

Country Status (1)

Country Link
JP (1) JPS5251918A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54168815U (en) * 1978-05-18 1979-11-28
JPS62114158A (en) * 1985-11-14 1987-05-25 Teac Co Disc device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54168815U (en) * 1978-05-18 1979-11-28
JPS62114158A (en) * 1985-11-14 1987-05-25 Teac Co Disc device
JPH0352657B2 (en) * 1985-11-14 1991-08-12 Teac Corp

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