DE3170211D1 - Systems for reading magnetic recordings - Google Patents
Systems for reading magnetic recordingsInfo
- Publication number
- DE3170211D1 DE3170211D1 DE8181110576T DE3170211T DE3170211D1 DE 3170211 D1 DE3170211 D1 DE 3170211D1 DE 8181110576 T DE8181110576 T DE 8181110576T DE 3170211 T DE3170211 T DE 3170211T DE 3170211 D1 DE3170211 D1 DE 3170211D1
- Authority
- DE
- Germany
- Prior art keywords
- systems
- reading magnetic
- magnetic recordings
- recordings
- reading
- 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
- G11B20/1426—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code conversion to or from block codes or representations thereof
-
- 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
- G11B5/027—Analogue recording
- G11B5/035—Equalising
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Digital Magnetic Recording (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Manipulation Of Pulses (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/234,519 US4346411A (en) | 1981-02-17 | 1981-02-17 | Amplitude sensitive three-level detector for derivative read back channel of magnetic storage device |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3170211D1 true DE3170211D1 (en) | 1985-05-30 |
Family
ID=22881696
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8181110576T Expired DE3170211D1 (en) | 1981-02-17 | 1981-12-18 | Systems for reading magnetic recordings |
Country Status (4)
Country | Link |
---|---|
US (1) | US4346411A (de) |
EP (1) | EP0058253B1 (de) |
JP (1) | JPS57138016A (de) |
DE (1) | DE3170211D1 (de) |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4467374A (en) * | 1982-04-05 | 1984-08-21 | Hewlett Packard Company | Method and means for direct-current polarity restoration in magnetic recording |
JPH067402B2 (ja) * | 1982-04-16 | 1994-01-26 | 株式会社日立製作所 | 信号再生方法及びこれに用いる波形等化回路 |
US4495529A (en) * | 1982-05-07 | 1985-01-22 | Digital Equipment Corporation | Qualifier circuit |
JPH065593B2 (ja) * | 1982-09-28 | 1994-01-19 | 株式会社東芝 | 磁気ディスク装置のパルス回路 |
EP0110105B1 (de) * | 1982-12-01 | 1987-03-18 | International Business Machines Corporation | System zum Lesen magnetischer Aufzeichnungen |
EP0131823A3 (de) * | 1983-06-29 | 1985-11-06 | Norbert Dr.-Ing. Bauer | Einrichtung zur Aufzeichnung und Rückgewinnung binärer Signale auf einem magnetischen Informationsträger |
US4626933A (en) * | 1983-08-18 | 1986-12-02 | Amcodyne Incorporated | Method and apparatus for qualifying data |
US4688113A (en) * | 1985-10-01 | 1987-08-18 | Telex Computer Products, Inc. | Apparatus for calibrating tape drive read system |
US4772964A (en) * | 1985-11-30 | 1988-09-20 | Kabushiki Kaisha Toshiba | Recorded data reproducing apparatus capable of performing auto-gain adjustment |
EP0269756B1 (de) * | 1986-08-05 | 1991-01-09 | International Business Machines Corporation | Verstärkungssteuerungsschaltung für ein Wiedergabegerät in einem magnetischen Aufzeichnungssystem, welches ein Verfahren mit partieller Wiedergabe und höchster Wahrscheinlichkeit verwendet |
US4789838A (en) * | 1987-03-23 | 1988-12-06 | Cheng Jyi Min | Pulse detection circuit using amplitude and time qualification |
JPH02166670A (ja) * | 1988-12-20 | 1990-06-27 | Tokico Ltd | 磁気ディスク装置 |
DE4020875A1 (de) * | 1990-06-29 | 1992-01-02 | Digital Equipment Int | Verfahren und schaltungsanordnung zum umwandeln von analogen lesesignalen in digitale signale |
DE4104645A1 (de) * | 1991-02-15 | 1992-08-20 | Thomson Brandt Gmbh | Schaltung zum erzeugen eines binaersignals aus einem ternaeren signal |
JPH0512735A (ja) * | 1991-07-05 | 1993-01-22 | Pioneer Electron Corp | 光磁気記録媒体の欠陥検査方法 |
JPH05101312A (ja) * | 1991-10-11 | 1993-04-23 | Sony Corp | データ再生装置 |
US5357150A (en) * | 1992-11-06 | 1994-10-18 | International Business Machines Corporation | Defect tolerant envelope follower |
US5373400A (en) * | 1993-12-01 | 1994-12-13 | Analog Devices, Inc. | Dynamic threshold updating circuit for a maximum likelihood detector using both positive and negative comparators |
US6975678B1 (en) * | 2001-03-30 | 2005-12-13 | Vuong Kim Le | Apparatus and averaging method for equalizing signals |
US20080061842A1 (en) * | 2006-09-07 | 2008-03-13 | Micron Technology, Inc. | Circuit and method for detecting timed amplitude reduction of a signal relative to a threshold voltage |
US7560959B2 (en) * | 2006-09-18 | 2009-07-14 | Micron Technology, Inc. | Absolute value peak differential voltage detector circuit and method |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3581297A (en) * | 1967-09-18 | 1971-05-25 | Burroughs Corp | Binary data handling system |
US3821716A (en) * | 1973-03-05 | 1974-06-28 | Honeywell Inf Systems | Method and apparatus for recovering data in an nrzi recording system |
US4081756A (en) * | 1976-12-30 | 1978-03-28 | Sperry Rand Corporation | Dual channel signal detector circuit |
US4298898A (en) * | 1979-04-19 | 1981-11-03 | Compagnie Internationale Pour L'informatique Cii Honeywell Bull | Method of and apparatus for reading data from reference zones of a memory |
CA1165825A (en) * | 1979-10-26 | 1984-04-17 | Masato Tanaka | Data extracting circuit |
JPS56136065A (en) * | 1980-03-27 | 1981-10-23 | Victor Co Of Japan Ltd | Data regenerator |
-
1981
- 1981-02-17 US US06/234,519 patent/US4346411A/en not_active Expired - Lifetime
- 1981-12-18 JP JP56203796A patent/JPS57138016A/ja active Granted
- 1981-12-18 EP EP81110576A patent/EP0058253B1/de not_active Expired
- 1981-12-18 DE DE8181110576T patent/DE3170211D1/de not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS57138016A (en) | 1982-08-26 |
JPH0241801B2 (de) | 1990-09-19 |
US4346411A (en) | 1982-08-24 |
EP0058253A3 (en) | 1983-02-16 |
EP0058253A2 (de) | 1982-08-25 |
EP0058253B1 (de) | 1985-04-24 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8339 | Ceased/non-payment of the annual fee |