DE3482431D1 - Digitale anordnung fuer ein daten-lesesystem von einem magnetischen traeger. - Google Patents
Digitale anordnung fuer ein daten-lesesystem von einem magnetischen traeger.Info
- Publication number
- DE3482431D1 DE3482431D1 DE8484107390T DE3482431T DE3482431D1 DE 3482431 D1 DE3482431 D1 DE 3482431D1 DE 8484107390 T DE8484107390 T DE 8484107390T DE 3482431 T DE3482431 T DE 3482431T DE 3482431 D1 DE3482431 D1 DE 3482431D1
- Authority
- DE
- Germany
- Prior art keywords
- data reading
- reading system
- magnetic carrier
- digital arrangement
- digital
- 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
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
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 (1)
| Publication Number | Publication Date |
|---|---|
| DE3482431D1 true DE3482431D1 (de) | 1990-07-12 |
Family
ID=11206854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE8484107390T Expired - Lifetime DE3482431D1 (de) | 1983-10-25 | 1984-06-27 | Digitale anordnung fuer ein daten-lesesystem von einem magnetischen traeger. |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4672482A (de) |
| EP (1) | EP0141028B1 (de) |
| JP (1) | JPS60253064A (de) |
| KR (1) | KR920003520B1 (de) |
| DE (1) | DE3482431D1 (de) |
| IT (1) | IT1206332B (de) |
Families Citing this family (12)
| 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)
| 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 |
-
1983
- 1983-10-25 IT IT8323411A patent/IT1206332B/it active
-
1984
- 1984-06-27 EP EP84107390A patent/EP0141028B1/de not_active Expired - Lifetime
- 1984-06-27 DE DE8484107390T patent/DE3482431D1/de not_active Expired - Lifetime
- 1984-10-09 US US06/659,112 patent/US4672482A/en not_active Expired - Fee Related
- 1984-10-25 KR KR1019840006640A patent/KR920003520B1/ko not_active IP Right Cessation
- 1984-10-25 JP JP59225063A patent/JPS60253064A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| IT8323411A0 (it) | 1983-10-25 |
| US4672482A (en) | 1987-06-09 |
| EP0141028A2 (de) | 1985-05-15 |
| JPS60253064A (ja) | 1985-12-13 |
| JPH0566676B2 (de) | 1993-09-22 |
| KR920003520B1 (ko) | 1992-05-02 |
| KR850003022A (ko) | 1985-05-28 |
| IT1206332B (it) | 1989-04-14 |
| EP0141028A3 (en) | 1987-12-09 |
| EP0141028B1 (de) | 1990-06-06 |
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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 |