CA1001297A - Digital data retrieval system with dynamic window skew - Google Patents
Digital data retrieval system with dynamic window skewInfo
- Publication number
- CA1001297A CA1001297A CA183,146A CA183146A CA1001297A CA 1001297 A CA1001297 A CA 1001297A CA 183146 A CA183146 A CA 183146A CA 1001297 A CA1001297 A CA 1001297A
- Authority
- CA
- Canada
- Prior art keywords
- digital data
- retrieval system
- data retrieval
- dynamic window
- window skew
- 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
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
- G11B20/14—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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
- H04L25/40—Transmitting circuits; Receiving circuits
- H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
- H04L25/4904—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using self-synchronising codes, e.g. split-phase codes
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00302914A US3827078A (en) | 1972-11-01 | 1972-11-01 | Digital data retrieval system with dynamic window skew |
Publications (1)
Publication Number | Publication Date |
---|---|
CA1001297A true CA1001297A (en) | 1976-12-07 |
Family
ID=23169764
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA183,146A Expired CA1001297A (en) | 1972-11-01 | 1973-10-11 | Digital data retrieval system with dynamic window skew |
Country Status (11)
Country | Link |
---|---|
US (1) | US3827078A (pt) |
JP (1) | JPS4978525A (pt) |
BE (1) | BE806099A (pt) |
BR (1) | BR7307685D0 (pt) |
CA (1) | CA1001297A (pt) |
DE (1) | DE2350713A1 (pt) |
FR (1) | FR2205232A5 (pt) |
GB (1) | GB1424268A (pt) |
IT (1) | IT995934B (pt) |
NL (1) | NL182033C (pt) |
SE (1) | SE396664B (pt) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3962726A (en) * | 1975-02-21 | 1976-06-08 | Mag-Tek, Inc. | Self-clocking magnetic record sensing system |
US4037257A (en) * | 1976-02-02 | 1977-07-19 | Xerox Corporation | Data clock separator with missing clock detect |
US4021853A (en) * | 1976-03-30 | 1977-05-03 | Sperry Rand Corporation | Method and apparatus for the magnetic storage of digital data |
US4393458A (en) * | 1980-02-06 | 1983-07-12 | Sperry Corporation | Data recovery method and apparatus using variable window |
US4532559A (en) * | 1983-02-14 | 1985-07-30 | Prime Computer, Inc. | Apparatus for decoding phase encoded data |
US4580176A (en) * | 1983-11-21 | 1986-04-01 | International Business Machines Corporation | Adaptive equalization circuit for magnetic recording channels utilizing signal timing |
JPS6117273A (ja) * | 1984-07-04 | 1986-01-25 | Nec Corp | 回転形磁気記録装置 |
US4808884A (en) * | 1985-12-02 | 1989-02-28 | Western Digital Corporation | High order digital phase-locked loop system |
GB2205467B (en) * | 1987-05-28 | 1992-02-12 | Apple Computer | Disk drive controller |
US5151985A (en) * | 1987-05-28 | 1992-09-29 | Apple Computer, Inc. | Disk drive controller |
US5414722A (en) * | 1992-07-14 | 1995-05-09 | Wangtek, Inc. | Selective data synchronizer |
US20070201596A1 (en) * | 2006-02-28 | 2007-08-30 | Flowers John P | Clock synchronization using early clock |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3636536A (en) * | 1968-03-21 | 1972-01-18 | Leach Corp | Derived clock circuit in a phase modulated digital data handling system |
US3609560A (en) * | 1970-01-09 | 1971-09-28 | Bedford Associates Inc | Data separation circuit for magnetic recorder memories |
US3689903A (en) * | 1970-10-16 | 1972-09-05 | Honeywell Inc | Voltage controlled oscillator with constrained period of frequency change |
US3656149A (en) * | 1970-11-23 | 1972-04-11 | Honeywell Inf Systems | Three frequency data separator |
US3684967A (en) * | 1971-01-08 | 1972-08-15 | Cogar Corp | Automatic control of position and width of a tracking window in a data recovery system |
US3737895A (en) * | 1971-08-02 | 1973-06-05 | Edmac Ass Inc | Bi-phase data recorder |
JPS5146604B2 (pt) * | 1971-09-17 | 1976-12-10 |
-
1972
- 1972-11-01 US US00302914A patent/US3827078A/en not_active Expired - Lifetime
-
1973
- 1973-07-23 GB GB3509073A patent/GB1424268A/en not_active Expired
- 1973-10-03 BR BR7685/73A patent/BR7307685D0/pt unknown
- 1973-10-05 JP JP48111576A patent/JPS4978525A/ja active Pending
- 1973-10-10 DE DE19732350713 patent/DE2350713A1/de not_active Withdrawn
- 1973-10-11 CA CA183,146A patent/CA1001297A/en not_active Expired
- 1973-10-12 NL NLAANVRAGE7314046,A patent/NL182033C/xx not_active IP Right Cessation
- 1973-10-15 BE BE136709A patent/BE806099A/xx not_active IP Right Cessation
- 1973-10-15 SE SE7313955A patent/SE396664B/xx unknown
- 1973-10-16 FR FR7336881A patent/FR2205232A5/fr not_active Expired
- 1973-10-17 IT IT30215/73A patent/IT995934B/it active
Also Published As
Publication number | Publication date |
---|---|
BE806099A (fr) | 1974-02-01 |
NL7314046A (pt) | 1974-05-03 |
IT995934B (it) | 1975-11-20 |
US3827078A (en) | 1974-07-30 |
GB1424268A (en) | 1976-02-11 |
NL182033B (nl) | 1987-07-16 |
NL182033C (nl) | 1987-12-16 |
SE396664B (sv) | 1977-09-26 |
FR2205232A5 (pt) | 1974-05-24 |
JPS4978525A (pt) | 1974-07-29 |
BR7307685D0 (pt) | 1974-11-12 |
DE2350713A1 (de) | 1974-05-09 |
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