IT1206332B - Apparato digitale per sistema di recupero di informazioni binarie registrate su supporti magnetici. - Google Patents

Apparato digitale per sistema di recupero di informazioni binarie registrate su supporti magnetici.

Info

Publication number
IT1206332B
IT1206332B IT8323411A IT2341183A IT1206332B IT 1206332 B IT1206332 B IT 1206332B IT 8323411 A IT8323411 A IT 8323411A IT 2341183 A IT2341183 A IT 2341183A IT 1206332 B IT1206332 B IT 1206332B
Authority
IT
Italy
Prior art keywords
information recorded
recovery system
magnetic media
binary information
digital apparatus
Prior art date
Application number
IT8323411A
Other languages
English (en)
Other versions
IT8323411A0 (it
Inventor
Bonifacio Troletti
Original Assignee
Honeywell Inf Systems
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 Honeywell Inf Systems filed Critical Honeywell Inf Systems
Priority to IT8323411A priority Critical patent/IT1206332B/it
Publication of IT8323411A0 publication Critical patent/IT8323411A0/it
Priority to EP84107390A priority patent/EP0141028B1/en
Priority to DE8484107390T priority patent/DE3482431D1/de
Priority to US06/659,112 priority patent/US4672482A/en
Priority to JP59225063A priority patent/JPS60253064A/ja
Priority to KR1019840006640A priority patent/KR920003520B1/ko
Application granted granted Critical
Publication of IT1206332B publication Critical patent/IT1206332B/it

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
    • 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)
IT8323411A 1983-10-25 1983-10-25 Apparato digitale per sistema di recupero di informazioni binarie registrate su supporti magnetici. IT1206332B (it)

Priority Applications (6)

Application Number Priority Date Filing Date Title
IT8323411A IT1206332B (it) 1983-10-25 1983-10-25 Apparato digitale per sistema di recupero di informazioni binarie registrate su supporti magnetici.
EP84107390A EP0141028B1 (en) 1983-10-25 1984-06-27 Digital apparatus for magnetic media data recovery system
DE8484107390T DE3482431D1 (de) 1983-10-25 1984-06-27 Digitale anordnung fuer ein daten-lesesystem von einem magnetischen traeger.
US06/659,112 US4672482A (en) 1983-10-25 1984-10-09 Digital apparatus for magnetic media data recovery system
JP59225063A JPS60253064A (ja) 1983-10-25 1984-10-25 磁気媒体デ−タ再生システム用デジタル装置
KR1019840006640A KR920003520B1 (ko) 1983-10-25 1984-10-25 자성 매개 데이타 재생 시스템용 디지탈 장치

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT8323411A IT1206332B (it) 1983-10-25 1983-10-25 Apparato digitale per sistema di recupero di informazioni binarie registrate su supporti magnetici.

Publications (2)

Publication Number Publication Date
IT8323411A0 IT8323411A0 (it) 1983-10-25
IT1206332B true IT1206332B (it) 1989-04-14

Family

ID=11206854

Family Applications (1)

Application Number Title Priority Date Filing Date
IT8323411A IT1206332B (it) 1983-10-25 1983-10-25 Apparato digitale per sistema di recupero di informazioni binarie registrate su supporti magnetici.

Country Status (6)

Country Link
US (1) US4672482A (it)
EP (1) EP0141028B1 (it)
JP (1) JPS60253064A (it)
KR (1) KR920003520B1 (it)
DE (1) DE3482431D1 (it)
IT (1) IT1206332B (it)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1185412B (it) * 1985-10-10 1987-11-12 Honeywell Inf Systems Tseparatore digitale di dati
IT1185411B (it) * 1985-10-10 1987-11-12 Honeywell Inf Systems Separatore digitale di dati
JP2540805B2 (ja) * 1986-04-12 1996-10-09 ソニー株式会社 ディジタル信号の伝送装置
US4734900A (en) * 1986-04-25 1988-03-29 International Business Machines Corporation Restoring and clocking pulse width modulated data
US4780844A (en) * 1986-07-18 1988-10-25 Commodore-Amiga, Inc. Data input circuit with digital phase locked loop
JPS6352307A (ja) * 1986-08-20 1988-03-05 Toshiba Corp 磁気デイスク装置
US4851932A (en) * 1988-01-29 1989-07-25 Storage Technology Corporation Adaptive compensation circuit for moving data storage media
JP2554719B2 (ja) * 1988-09-30 1996-11-13 株式会社東芝 記録データ読取り方式
US5025457A (en) * 1989-04-21 1991-06-18 Codex Corporation Synchronizing continuous bit stream oriented terminals in a communications network
US5543975A (en) * 1993-11-12 1996-08-06 Hewlett-Packard Company Removal of precompensation in a write data signal from a flexible disk controller
JP3345515B2 (ja) * 1994-08-31 2002-11-18 アイワ株式会社 ピークシフト補正回路およびそれを使用した磁気記録媒体再生装置
US6419554B2 (en) 1999-06-24 2002-07-16 Micron Technology, Inc. Fixed abrasive chemical-mechanical planarization of titanium nitride

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2234203A1 (de) * 1972-07-12 1974-01-31 Licentia Gmbh Verfahren und vorrichtung zum empfang seriell ankommender, digitaler, phasenkodierter signale
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
US3864735A (en) * 1973-09-12 1975-02-04 Burroughs Corp Read/write system for high density magnetic recording
US4222080A (en) * 1978-12-21 1980-09-09 International Business Machines Corporation Velocity tolerant decoding technique
US4344039A (en) * 1979-03-13 1982-08-10 Sanyo Electric Co., Ltd. Demodulating circuit for self-clocking-information
US4298956A (en) * 1979-05-14 1981-11-03 Honeywell Information Systems Inc. Digital read recovery with variable frequency compensation using read only memories
US4393458A (en) * 1980-02-06 1983-07-12 Sperry Corporation Data recovery method and apparatus using variable window
JPS5720052A (en) * 1980-07-11 1982-02-02 Toshiba Corp Input data synchronizing circuit
JPS5744233A (en) * 1980-08-28 1982-03-12 Matsushita Electric Ind Co Ltd Recorder and reproducer of digital signal
JPS5763957A (en) * 1980-10-06 1982-04-17 Hitachi Ltd Mfm demodulating circuit
US4547890A (en) * 1982-09-28 1985-10-15 Abraham M. Gindi Apparatus and method for forming d.c. free codes

Also Published As

Publication number Publication date
KR850003022A (ko) 1985-05-28
EP0141028A3 (en) 1987-12-09
KR920003520B1 (ko) 1992-05-02
EP0141028A2 (en) 1985-05-15
DE3482431D1 (de) 1990-07-12
JPH0566676B2 (it) 1993-09-22
EP0141028B1 (en) 1990-06-06
US4672482A (en) 1987-06-09
IT8323411A0 (it) 1983-10-25
JPS60253064A (ja) 1985-12-13

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