IT1185412B - Tseparatore digitale di dati - Google Patents
Tseparatore digitale di datiInfo
- Publication number
- IT1185412B IT1185412B IT22431/85A IT2243185A IT1185412B IT 1185412 B IT1185412 B IT 1185412B IT 22431/85 A IT22431/85 A IT 22431/85A IT 2243185 A IT2243185 A IT 2243185A IT 1185412 B IT1185412 B IT 1185412B
- Authority
- IT
- Italy
- Prior art keywords
- digital data
- data separator
- separator
- digital
- data
- Prior art date
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
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT22431/85A IT1185412B (it) | 1985-10-10 | 1985-10-10 | Tseparatore digitale di dati |
US06/911,022 US4742403A (en) | 1985-10-10 | 1986-09-23 | Digital data separator |
EP86113528A EP0222132B1 (en) | 1985-10-10 | 1986-10-01 | Digital data separator |
DE8686113528T DE3672004D1 (de) | 1985-10-10 | 1986-10-01 | Trennschaltung fuer digitale daten. |
KR1019860008569A KR920009640B1 (ko) | 1985-10-10 | 1986-10-10 | 디지틀 데이타 분리장치 |
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 (2)
Publication Number | Publication Date |
---|---|
IT8522431A0 IT8522431A0 (it) | 1985-10-10 |
IT1185412B true IT1185412B (it) | 1987-11-12 |
Family
ID=11196219
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT22431/85A IT1185412B (it) | 1985-10-10 | 1985-10-10 | Tseparatore digitale di dati |
Country Status (5)
Country | Link |
---|---|
US (1) | US4742403A (it) |
EP (1) | EP0222132B1 (it) |
KR (1) | KR920009640B1 (it) |
DE (1) | DE3672004D1 (it) |
IT (1) | IT1185412B (it) |
Families Citing this family (7)
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 |
US5553100A (en) * | 1994-04-01 | 1996-09-03 | National Semiconductor Corporation | Fully digital data separator and frequency multiplier |
US5438300A (en) * | 1994-04-01 | 1995-08-01 | National Semiconductor Corporation | Digital frequency multiplier utilizing digital controlled oscillator |
EP1126398A3 (en) | 2000-01-24 | 2002-08-21 | Kabushiki Kaisha Sankyo Seiki Seisakusho | Magnetic card reader and reproduction and demodulation method |
Family Cites Families (8)
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 |
-
1985
- 1985-10-10 IT IT22431/85A patent/IT1185412B/it active
-
1986
- 1986-09-23 US US06/911,022 patent/US4742403A/en not_active Expired - Fee Related
- 1986-10-01 DE DE8686113528T patent/DE3672004D1/de not_active Expired - Lifetime
- 1986-10-01 EP EP86113528A patent/EP0222132B1/en not_active Expired - Lifetime
- 1986-10-10 KR KR1019860008569A patent/KR920009640B1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR920009640B1 (ko) | 1992-10-22 |
US4742403A (en) | 1988-05-03 |
DE3672004D1 (de) | 1990-07-19 |
IT8522431A0 (it) | 1985-10-10 |
EP0222132A2 (en) | 1987-05-20 |
EP0222132A3 (en) | 1988-10-26 |
KR870004374A (ko) | 1987-05-09 |
EP0222132B1 (en) | 1990-06-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19931029 |