DE3267145D1 - A method of and apparatus for, generating a unique index mark from the commutation signal of a d.c. brushless motor - Google Patents

A method of and apparatus for, generating a unique index mark from the commutation signal of a d.c. brushless motor

Info

Publication number
DE3267145D1
DE3267145D1 DE8282303263T DE3267145T DE3267145D1 DE 3267145 D1 DE3267145 D1 DE 3267145D1 DE 8282303263 T DE8282303263 T DE 8282303263T DE 3267145 T DE3267145 T DE 3267145T DE 3267145 D1 DE3267145 D1 DE 3267145D1
Authority
DE
Germany
Prior art keywords
disk
synchronizing signal
output
flip
flop
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.)
Expired
Application number
DE8282303263T
Other languages
English (en)
Inventor
David Scott Ruxton
Alec Donald Stewart
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.)
Rodime PLC
Original Assignee
Rodime PLC
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 Rodime PLC filed Critical Rodime PLC
Application granted granted Critical
Publication of DE3267145D1 publication Critical patent/DE3267145D1/de
Expired 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
    • G11B27/11—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information not detectable on the record carrier
    • G11B27/13—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information not detectable on the record carrier the information being derived from movement of the record carrier, e.g. using tachometer
    • 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
    • G11B27/32—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 separate auxiliary tracks of the same or an auxiliary record carrier

Landscapes

  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
DE8282303263T 1981-06-30 1982-06-22 A method of and apparatus for, generating a unique index mark from the commutation signal of a d.c. brushless motor Expired DE3267145D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8120092 1981-06-30

Publications (1)

Publication Number Publication Date
DE3267145D1 true DE3267145D1 (en) 1985-12-05

Family

ID=10522889

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8282303263T Expired DE3267145D1 (en) 1981-06-30 1982-06-22 A method of and apparatus for, generating a unique index mark from the commutation signal of a d.c. brushless motor

Country Status (8)

Country Link
US (1) US4392095A (de)
EP (1) EP0068803B1 (de)
JP (1) JPS58170395A (de)
AT (1) ATE16324T1 (de)
CA (1) CA1180050A (de)
DE (1) DE3267145D1 (de)
HK (1) HK71986A (de)
IE (1) IE53346B1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0210630A3 (de) * 1985-07-29 1987-11-11 Xebec Verfahren zur Signalverarbeitung von Datenspeicherplatten
EP0220812A3 (de) * 1985-09-06 1988-11-09 Rodime PLC Plattengerät mit hoher Kapazität
US4812929A (en) * 1985-11-19 1989-03-14 Rodime Plc Head positioning mechanism for rotating disk data storage system
US6067202A (en) * 1996-12-18 2000-05-23 International Business Machines Corporation Method and apparatus for controlling spindle motor commutation switching times in a disk drive
US7194099B2 (en) * 2003-06-10 2007-03-20 Motorola, Inc. Handheld electronics devices with multiple user sensory transducers and methods

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL266571A (de) * 1960-06-30
US3177476A (en) * 1961-05-29 1965-04-06 Rca Corp Information storage apparatus utilizing a record of internally reflective, light conducting material
US3851116A (en) * 1969-12-24 1974-11-26 Ibm Automatic magnetic tape information retrieval system with speed and position tape drive control
DE2132783B2 (de) * 1971-07-01 1972-10-05 Siemens Ag Anordnung zur erzeugung des taktes fuer die aufzeichnung von digitaler information auf einem datentraeger, insbesondere einem magnetband
GB1499071A (en) * 1976-02-10 1978-01-25 Price Bros & Co Ltd Bed unit
US4135217A (en) * 1976-11-02 1979-01-16 Xerox Corporation Utilization of stored run-out information in a track following servo system

Also Published As

Publication number Publication date
CA1180050A (en) 1984-12-27
JPS58170395A (ja) 1983-10-06
IE53346B1 (en) 1988-10-26
EP0068803A1 (de) 1983-01-05
ATE16324T1 (de) 1985-11-15
US4392095A (en) 1983-07-05
IE821463L (en) 1982-12-30
HK71986A (en) 1986-10-03
EP0068803B1 (de) 1985-10-30

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee