CA1172766A - Codeur de donnees mfm avec precompensation d'ecriture - Google Patents

Codeur de donnees mfm avec precompensation d'ecriture

Info

Publication number
CA1172766A
CA1172766A CA000323397A CA323397A CA1172766A CA 1172766 A CA1172766 A CA 1172766A CA 000323397 A CA000323397 A CA 000323397A CA 323397 A CA323397 A CA 323397A CA 1172766 A CA1172766 A CA 1172766A
Authority
CA
Canada
Prior art keywords
bit
serial
encoded
parallel
input
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
CA000323397A
Other languages
English (en)
Inventor
John G. Theus
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.)
Tektronix Inc
Original Assignee
Tektronix Inc
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 Tektronix Inc filed Critical Tektronix Inc
Application granted granted Critical
Publication of CA1172766A publication Critical patent/CA1172766A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
    • G11B20/10194—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter using predistortion during writing

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Digital Magnetic Recording (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Dc Digital Transmission (AREA)
CA000323397A 1978-03-16 1979-03-14 Codeur de donnees mfm avec precompensation d'ecriture Expired CA1172766A (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US88740378A 1978-03-16 1978-03-16
US887,403 1978-03-16

Publications (1)

Publication Number Publication Date
CA1172766A true CA1172766A (fr) 1984-08-14

Family

ID=25391063

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000323397A Expired CA1172766A (fr) 1978-03-16 1979-03-14 Codeur de donnees mfm avec precompensation d'ecriture

Country Status (6)

Country Link
JP (1) JPS59888B2 (fr)
CA (1) CA1172766A (fr)
DE (1) DE2909822C2 (fr)
FR (1) FR2420250A1 (fr)
GB (1) GB2016762B (fr)
NL (1) NL7902070A (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4245263A (en) * 1979-05-14 1981-01-13 Honeywell Information Systems Inc. Write precompensation and write encoding for FM and MFM recording
DE3326912A1 (de) * 1983-07-26 1985-02-07 Siemens AG, 1000 Berlin und 8000 München Einrichtung zur codeumsetzung
US4756008A (en) * 1986-03-03 1988-07-05 Hitachi, Ltd. Digitized quadrature phase shift keying modulator

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3067422A (en) * 1958-12-24 1962-12-04 Ibm Phase distortion correction for high density magnetic recording
US3482228A (en) * 1965-10-21 1969-12-02 Sperry Rand Corp Write circuit for a phase modulation system
US3685033A (en) * 1970-08-24 1972-08-15 Honeywell Inc Block encoding for magnetic recording systems
US3879342A (en) * 1973-12-28 1975-04-22 Honeywell Inf Systems Pre-recorded digital data compensation system
US4000513A (en) * 1975-07-28 1976-12-28 Computer Peripherals, Inc. Apparatus and method for data recording with peak shift compensation

Also Published As

Publication number Publication date
DE2909822C2 (de) 1982-06-03
NL7902070A (nl) 1979-09-18
JPS54133019A (en) 1979-10-16
FR2420250A1 (fr) 1979-10-12
GB2016762B (en) 1982-08-25
FR2420250B1 (fr) 1983-08-12
DE2909822A1 (de) 1979-09-20
JPS59888B2 (ja) 1984-01-09
GB2016762A (en) 1979-09-26

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Legal Events

Date Code Title Description
MKEX Expiry