JPS5616966A - Track passing pulse generating circuit - Google Patents

Track passing pulse generating circuit

Info

Publication number
JPS5616966A
JPS5616966A JP9064179A JP9064179A JPS5616966A JP S5616966 A JPS5616966 A JP S5616966A JP 9064179 A JP9064179 A JP 9064179A JP 9064179 A JP9064179 A JP 9064179A JP S5616966 A JPS5616966 A JP S5616966A
Authority
JP
Japan
Prior art keywords
pulse
signal
txpl
gate
servo
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
JP9064179A
Other languages
Japanese (ja)
Inventor
Teruaki Emori
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP9064179A priority Critical patent/JPS5616966A/en
Publication of JPS5616966A publication Critical patent/JPS5616966A/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
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/54—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
    • G11B5/55—Track change, selection or acquisition by displacement of the head
    • G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
    • G11B5/5526—Control therefor; circuits, track configurations or relative disposition of servo-information transducers and servo-information tracks for control thereof
    • G11B5/553—Details

Landscapes

  • Moving Of Head For Track Selection And Changing (AREA)
  • Control Of Position Or Direction (AREA)

Abstract

PURPOSE: To generate the track passing pulse accurately, by removing the virtual pulse through the logical processing of the gate signal different in the period in response to the moving speed of servo head and the track crossing pulse.
CONSTITUTION: In the position sense circuit of the servo circuit controlling the carrying of servo head, the gate pulse 26 the period T of which is proportional to the speed is generated with the variable monostable multivibrator triggered with the servo carrying speed signal VEL. This pulse 26 and the track crossing pulse TXPL 24 detected with the position signal POS are processed for logical product at the AND gate 33, allowing to remove the virtual signal TXPL detected with the distortion of the signal POS and to generate the track passing pulse TXPL' accurately corrected.
COPYRIGHT: (C)1981,JPO&Japio
JP9064179A 1979-07-17 1979-07-17 Track passing pulse generating circuit Pending JPS5616966A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9064179A JPS5616966A (en) 1979-07-17 1979-07-17 Track passing pulse generating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9064179A JPS5616966A (en) 1979-07-17 1979-07-17 Track passing pulse generating circuit

Publications (1)

Publication Number Publication Date
JPS5616966A true JPS5616966A (en) 1981-02-18

Family

ID=14004121

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9064179A Pending JPS5616966A (en) 1979-07-17 1979-07-17 Track passing pulse generating circuit

Country Status (1)

Country Link
JP (1) JPS5616966A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4575775A (en) * 1984-08-27 1986-03-11 International Business Machines Corporation Magnetic recording disk having a sector servo pattern for use with a multiple element head
US4695989A (en) * 1982-08-31 1987-09-22 Tokyo Shibaura Denki Kabushiki Kaisha Optical disc apparatus with selective track accessing using a correction scale value
EP0289143A2 (en) * 1987-04-30 1988-11-02 Mitsubishi Denki Kabushiki Kaisha Optical disk drive apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4695989A (en) * 1982-08-31 1987-09-22 Tokyo Shibaura Denki Kabushiki Kaisha Optical disc apparatus with selective track accessing using a correction scale value
US4575775A (en) * 1984-08-27 1986-03-11 International Business Machines Corporation Magnetic recording disk having a sector servo pattern for use with a multiple element head
EP0289143A2 (en) * 1987-04-30 1988-11-02 Mitsubishi Denki Kabushiki Kaisha Optical disk drive apparatus

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