JPS56134361A - Position signal generating circuit for magnetic disk device - Google Patents

Position signal generating circuit for magnetic disk device

Info

Publication number
JPS56134361A
JPS56134361A JP3755280A JP3755280A JPS56134361A JP S56134361 A JPS56134361 A JP S56134361A JP 3755280 A JP3755280 A JP 3755280A JP 3755280 A JP3755280 A JP 3755280A JP S56134361 A JPS56134361 A JP S56134361A
Authority
JP
Japan
Prior art keywords
signal
servo
accordance
signals
position signal
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.)
Granted
Application number
JP3755280A
Other languages
Japanese (ja)
Other versions
JPS6250908B2 (en
Inventor
Toshiaki Hattori
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP3755280A priority Critical patent/JPS56134361A/en
Publication of JPS56134361A publication Critical patent/JPS56134361A/en
Publication of JPS6250908B2 publication Critical patent/JPS6250908B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • G11B21/08—Track changing or selecting during transducing operation
    • G11B21/081—Access to indexed tracks or parts of continuous track
    • G11B21/083—Access to indexed tracks or parts of continuous track on discs
    • G11B21/085—Access to indexed tracks or parts of continuous track on discs with track following of accessed part

Landscapes

  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
  • Moving Of Head For Track Selection And Changing (AREA)
  • Moving Of The Head To Find And Align With The Track (AREA)
  • Control Of Position Or Direction (AREA)

Abstract

PURPOSE:To equalize the density of both the data track and the servo-track, and also obtain a position signal which can be converted to an exact speed signal, by leading out a prescribed position signal in accordance with two-phase servo-information from the servo-head. CONSTITUTION:The servo-information detection part 60 generates signals A-D which are periodically varied in accordance with the position of the servo-head 20, generates position signals E-H which are out of phase by 90 deg. each in accordance with said signals A-D, and sends them out to the selective part 70. In case when a level of the signal E is within a prescribed range, the selective part 70 selects and outputs one of the signals E, G in accordance with the polarity of the signal F or H, and also, in case a level of the signal E is not within the prescribed range, the selective part 70 selects and outputs one of the signals F, H in accordance with the polarity of the signal E or G. And, the head 20 is located in the radial direction of the disk so that a level of this output position signal P becomes zero.
JP3755280A 1980-03-26 1980-03-26 Position signal generating circuit for magnetic disk device Granted JPS56134361A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3755280A JPS56134361A (en) 1980-03-26 1980-03-26 Position signal generating circuit for magnetic disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3755280A JPS56134361A (en) 1980-03-26 1980-03-26 Position signal generating circuit for magnetic disk device

Publications (2)

Publication Number Publication Date
JPS56134361A true JPS56134361A (en) 1981-10-21
JPS6250908B2 JPS6250908B2 (en) 1987-10-27

Family

ID=12500680

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3755280A Granted JPS56134361A (en) 1980-03-26 1980-03-26 Position signal generating circuit for magnetic disk device

Country Status (1)

Country Link
JP (1) JPS56134361A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0572412U (en) * 1992-03-04 1993-10-05 凸版印刷株式会社 Primary molded products for biaxially stretch blow molded containers

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4068269A (en) * 1975-05-12 1978-01-10 International Business Machines Corporation Positioning system for data storage apparatus and record medium for use therewith

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4068269A (en) * 1975-05-12 1978-01-10 International Business Machines Corporation Positioning system for data storage apparatus and record medium for use therewith

Also Published As

Publication number Publication date
JPS6250908B2 (en) 1987-10-27

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