GB1486655A - Decoding of digital information from a tape - Google Patents

Decoding of digital information from a tape

Info

Publication number
GB1486655A
GB1486655A GB36895/75A GB3689575A GB1486655A GB 1486655 A GB1486655 A GB 1486655A GB 36895/75 A GB36895/75 A GB 36895/75A GB 3689575 A GB3689575 A GB 3689575A GB 1486655 A GB1486655 A GB 1486655A
Authority
GB
United Kingdom
Prior art keywords
switch
voltage
output
tape
comparator
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
Application number
GB36895/75A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HP Inc
Original Assignee
Hewlett Packard Co
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 Hewlett Packard Co filed Critical Hewlett Packard Co
Publication of GB1486655A publication Critical patent/GB1486655A/en
Expired legal-status Critical Current

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

Landscapes

  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Dc Digital Transmission (AREA)
GB36895/75A 1974-09-30 1975-09-08 Decoding of digital information from a tape Expired GB1486655A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/510,852 US3974523A (en) 1974-09-30 1974-09-30 Speed invariant decoding of digital information from a magnetic tape

Publications (1)

Publication Number Publication Date
GB1486655A true GB1486655A (en) 1977-09-21

Family

ID=24032466

Family Applications (1)

Application Number Title Priority Date Filing Date
GB36895/75A Expired GB1486655A (en) 1974-09-30 1975-09-08 Decoding of digital information from a tape

Country Status (7)

Country Link
US (1) US3974523A (enExample)
JP (2) JPS5159612A (enExample)
AU (1) AU8525475A (enExample)
CA (1) CA1068814A (enExample)
DE (1) DE2541345A1 (enExample)
FR (1) FR2286553A1 (enExample)
GB (1) GB1486655A (enExample)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4297729A (en) * 1977-11-24 1981-10-27 Emi Limited Encoding and decoding of digital recordings
US4426667A (en) 1978-05-17 1984-01-17 Savin Corporation Pulse width modulation system
US4222080A (en) * 1978-12-21 1980-09-09 International Business Machines Corporation Velocity tolerant decoding technique
AT375486B (de) * 1982-12-07 1984-08-10 Philips Nv System zum aufzeichnen und/oder auswerten von zwei markiersignalen
US4780772A (en) * 1985-09-13 1988-10-25 Hitachi, Ltd. Apparatus for reproducing digital signals from a digital audio recording medium
US5229894A (en) * 1988-02-16 1993-07-20 M.R. Sensors Limited Method and apparatus for reading and decoding information using a magnetoresistive sensor

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3235855A (en) * 1961-10-02 1966-02-15 Honeywell Inc Binary magnetic recording apparatus
NL6700438A (enExample) * 1966-02-21 1967-08-22
US3646534A (en) * 1969-05-05 1972-02-29 Wendell S Miller High-density data processing
BE755662A (fr) * 1969-09-17 1971-02-15 Burroughs Corp Procede et appareil d'enregistrement et de detection magnetiques par modulation de frequence
US3711843A (en) * 1970-04-27 1973-01-16 Olivetti & Co Spa Self-adapting synchronization system for reading information from a moving support
US3644910A (en) * 1970-09-16 1972-02-22 Computer Mate Inc Readout circuitry with compensation for speed variations
US3720927A (en) * 1971-01-25 1973-03-13 Redactron Corp Speed insensitive reading and writing apparatus for digital information
US3763353A (en) * 1971-09-27 1973-10-02 E Nassimbene Retrospective pulse modulation decoding apparatus
US3727202A (en) * 1972-01-10 1973-04-10 Telex Computer Products Application of an automatic pulse width controlled, monostable multivibrator for detecting phase encoded information on magnetic tape
US3862400A (en) * 1972-03-31 1975-01-21 Electronics Corp America Sensing system for bar patterns

Also Published As

Publication number Publication date
DE2541345A1 (de) 1976-04-15
JPS5159612A (enExample) 1976-05-24
FR2286553A1 (fr) 1976-04-23
JPS562120U (enExample) 1981-01-09
FR2286553B3 (enExample) 1977-10-21
AU8525475A (en) 1977-04-07
CA1068814A (en) 1979-12-25
US3974523A (en) 1976-08-10

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years

Effective date: 19950907