DE3672004D1 - Trennschaltung fuer digitale daten. - Google Patents

Trennschaltung fuer digitale daten.

Info

Publication number
DE3672004D1
DE3672004D1 DE8686113528T DE3672004T DE3672004D1 DE 3672004 D1 DE3672004 D1 DE 3672004D1 DE 8686113528 T DE8686113528 T DE 8686113528T DE 3672004 T DE3672004 T DE 3672004T DE 3672004 D1 DE3672004 D1 DE 3672004D1
Authority
DE
Germany
Prior art keywords
isolation
digital data
digital
data
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 - Lifetime
Application number
DE8686113528T
Other languages
English (en)
Inventor
Bonifacio Troletti
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.)
Bull HN Information Systems Italia SpA
Bull HN Information Systems Inc
Original Assignee
Bull HN Information Systems Italia SpA
Bull HN Information Systems 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 Bull HN Information Systems Italia SpA, Bull HN Information Systems Inc filed Critical Bull HN Information Systems Italia SpA
Application granted granted Critical
Publication of DE3672004D1 publication Critical patent/DE3672004D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • G11B5/09—Digital recording
    • 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
    • G11B20/10212—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter compensation for data shift, e.g. pulse-crowding effects
    • 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
    • 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
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
    • G11B20/1407—Digital recording or reproducing using self-clocking codes characterised by the use of two levels code representation depending on a single bit, i.e. where a one is always represented by a first code symbol while a zero is always represented by a second code symbol
    • G11B20/1419—Digital recording or reproducing using self-clocking codes characterised by the use of two levels code representation depending on a single bit, i.e. where a one is always represented by a first code symbol while a zero is always represented by a second code symbol to or from biphase level coding, i.e. to or from codes where a one is coded as a transition from a high to a low level during the middle of a bit cell and a zero is encoded as a transition from a low to a high level during the middle of a bit cell or vice versa, e.g. split phase code, Manchester code conversion to or from biphase space or mark coding, i.e. to or from codes where there is a transition at the beginning of every bit cell and a one has no second transition and a zero has a second transition one half of a bit period later or vice versa, e.g. double frequency code, FM code
    • 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
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
    • G11B20/1423—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
DE8686113528T 1985-10-10 1986-10-01 Trennschaltung fuer digitale daten. Expired - Lifetime DE3672004D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT22431/85A IT1185412B (it) 1985-10-10 1985-10-10 Tseparatore digitale di dati

Publications (1)

Publication Number Publication Date
DE3672004D1 true DE3672004D1 (de) 1990-07-19

Family

ID=11196219

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8686113528T Expired - Lifetime DE3672004D1 (de) 1985-10-10 1986-10-01 Trennschaltung fuer digitale daten.

Country Status (5)

Country Link
US (1) US4742403A (de)
EP (1) EP0222132B1 (de)
KR (1) KR920009640B1 (de)
DE (1) DE3672004D1 (de)
IT (1) IT1185412B (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4006426C2 (de) * 1990-03-01 1993-11-18 Siemens Nixdorf Inf Syst Verfahren zum Auswerten binärer Informationen einer Magnetspeicherkarte
JPH0528659A (ja) * 1991-05-16 1993-02-05 Olympus Optical Co Ltd デイジタル信号再生装置
US5276666A (en) * 1992-03-04 1994-01-04 Storage Technology Corporation Bit shift post-compensation using sampled data prequalifier
GB9209535D0 (en) * 1992-05-01 1992-06-17 Questech Ltd Data signal decoding device
US5438300A (en) * 1994-04-01 1995-08-01 National Semiconductor Corporation Digital frequency multiplier utilizing digital controlled oscillator
US5553100A (en) * 1994-04-01 1996-09-03 National Semiconductor Corporation Fully digital data separator and frequency multiplier
EP1605389B1 (de) 2000-01-24 2009-03-18 Nidec Sankyo Corporation Magnetkartenleser sowie Wiedergabe- und Demodulationsverfahren

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3238462A (en) * 1963-09-18 1966-03-01 Telemetrics Inc Synchronous clock pulse generator
US3624521A (en) * 1970-06-19 1971-11-30 Honeywell Inc Synchronous read clock apparatus
US3810234A (en) * 1972-08-21 1974-05-07 Memorex Corp Data recovery circuit
IT1007175B (it) * 1973-02-08 1976-10-30 Siemens Ag Circuito correttore digitale per correggere le sequenze di impulsi di lettura fornite da una memoria a strato magnetico
US4245264A (en) * 1979-07-19 1981-01-13 Control Systems, Inc. Apparatus and method for digitally synchronizing the timing of a sequence of electrical output pulses in accordance with a selectable, permissably non-linear function of the timing of a sequence of electrical input pulses
JPS5720052A (en) * 1980-07-11 1982-02-02 Toshiba Corp Input data synchronizing circuit
IT1206332B (it) * 1983-10-25 1989-04-14 Honeywell Inf Systems Apparato digitale per sistema di recupero di informazioni binarie registrate su supporti magnetici.
IT1200426B (it) * 1985-03-21 1989-01-18 Honeywell Inf Systems Apparato digitale per sistema di recupero di informazioni binarie registrate su supporti magnetici

Also Published As

Publication number Publication date
EP0222132B1 (de) 1990-06-13
IT1185412B (it) 1987-11-12
EP0222132A3 (en) 1988-10-26
US4742403A (en) 1988-05-03
IT8522431A0 (it) 1985-10-10
KR870004374A (ko) 1987-05-09
KR920009640B1 (ko) 1992-10-22
EP0222132A2 (de) 1987-05-20

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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