JPS5644168A - Signal discrimination system - Google Patents

Signal discrimination system

Info

Publication number
JPS5644168A
JPS5644168A JP11900579A JP11900579A JPS5644168A JP S5644168 A JPS5644168 A JP S5644168A JP 11900579 A JP11900579 A JP 11900579A JP 11900579 A JP11900579 A JP 11900579A JP S5644168 A JPS5644168 A JP S5644168A
Authority
JP
Japan
Prior art keywords
pulse
index
sgp
constitute
sector pattern
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
JP11900579A
Other languages
Japanese (ja)
Inventor
Masateru Sasaki
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 JP11900579A priority Critical patent/JPS5644168A/en
Publication of JPS5644168A publication Critical patent/JPS5644168A/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
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
    • G11B27/30—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording
    • G11B27/3027—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording used signal is digitally coded

Landscapes

  • Moving Of Head For Track Selection And Changing (AREA)
  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)

Abstract

PURPOSE:To constitute an index pattern and sector pattern by adding a pulse or no pulse in position pulses of a servo information signal used for the positioning of a magnetic disk unit. CONSTITUTION:Among position pulses POSP, part SGP that has no signal pulse normally is provided and in the index or sector pattern area, additional pulse ADP is generated in part SGP to constitute the index or sector pattern. Therefore, since clock pulses reside at any time, the reliability of the synchronous operation of the whole unit never deteriorates and in seek mode, the position signal does not cause the malfunction of the counting of the number of tracks.
JP11900579A 1979-09-17 1979-09-17 Signal discrimination system Pending JPS5644168A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11900579A JPS5644168A (en) 1979-09-17 1979-09-17 Signal discrimination system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11900579A JPS5644168A (en) 1979-09-17 1979-09-17 Signal discrimination system

Publications (1)

Publication Number Publication Date
JPS5644168A true JPS5644168A (en) 1981-04-23

Family

ID=14750629

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11900579A Pending JPS5644168A (en) 1979-09-17 1979-09-17 Signal discrimination system

Country Status (1)

Country Link
JP (1) JPS5644168A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0240745A2 (en) * 1983-08-31 1987-10-14 Memorex Corporation Disk drive servo techniques

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0240745A2 (en) * 1983-08-31 1987-10-14 Memorex Corporation Disk drive servo techniques
EP0240745A3 (en) * 1983-08-31 1987-11-19 Memorex Corporation Disk drive servo techniques

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