CA1082803A - Constant wavelength magnetic recording - Google Patents

Constant wavelength magnetic recording

Info

Publication number
CA1082803A
CA1082803A CA291,111A CA291111A CA1082803A CA 1082803 A CA1082803 A CA 1082803A CA 291111 A CA291111 A CA 291111A CA 1082803 A CA1082803 A CA 1082803A
Authority
CA
Canada
Prior art keywords
signal
frequency
phase
generating
recording
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
CA291,111A
Other languages
English (en)
French (fr)
Inventor
Thomas M. Frey
Stephen F. Pond
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.)
Xerox Corp
Original Assignee
Xerox Corp
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 Xerox Corp filed Critical Xerox Corp
Application granted granted Critical
Publication of CA1082803A publication Critical patent/CA1082803A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G19/00—Processes using magnetic patterns; Apparatus therefor, i.e. magnetography
    • 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
    • G11B20/02—Analogue recording or reproducing
    • G11B20/06—Angle-modulation recording or reproducing
    • 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
    • G11B5/86—Re-recording, i.e. transcribing information from one magnetisable record carrier on to one or more similar or dissimilar record carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40—Picture signal circuits
    • H04N1/40025—Circuits exciting or modulating particular heads for reproducing continuous tone value scales

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Control Of Electric Motors In General (AREA)
CA291,111A 1976-12-03 1977-11-17 Constant wavelength magnetic recording Expired CA1082803A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/747,284 US4115786A (en) 1976-12-03 1976-12-03 Constant wavelength magnetic recording
US747,284 1976-12-03

Publications (1)

Publication Number Publication Date
CA1082803A true CA1082803A (en) 1980-07-29

Family

ID=25004441

Family Applications (1)

Application Number Title Priority Date Filing Date
CA291,111A Expired CA1082803A (en) 1976-12-03 1977-11-17 Constant wavelength magnetic recording

Country Status (3)

Country Link
US (1) US4115786A (show.php)
CA (1) CA1082803A (show.php)
FR (1) FR2373086A1 (show.php)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57118444A (en) * 1981-01-14 1982-07-23 Toshiba Corp Processor of transmitted signal
US4387407A (en) * 1981-08-27 1983-06-07 Rca Corporation Video disc player having auxiliary vertical synchronizing generator
TWI383599B (zh) * 2008-06-02 2013-01-21 Univ Nat Taiwan 雙二位元式收發器

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3441687A (en) * 1964-04-01 1969-04-29 Victor Company Of Japan Channel mixing system for multiple rotating heads
GB1060147A (en) * 1964-08-04 1967-03-01 Rank Bush Murphy Ltd Transducer head switching arrangements
US3499997A (en) * 1965-03-19 1970-03-10 Victor Company Of Japan System for controlling the levels of magnetically recorded and reproduced signals in a video tape recorder
US3465349A (en) * 1965-10-22 1969-09-02 Potter Instrument Co Inc Incremental stepper for tape transports
GB1259985A (en) * 1968-01-22 1972-01-12 Iwatsu Electric Co Ltd Frequency converting system
US3749833A (en) * 1972-02-14 1973-07-31 Pelorex Corp Facsimile transmission system
US4004205A (en) * 1973-12-06 1977-01-18 Hitachi Electronics, Ltd. Hybrid servo control system

Also Published As

Publication number Publication date
FR2373086B1 (show.php) 1983-03-18
US4115786A (en) 1978-09-19
FR2373086A1 (fr) 1978-06-30

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Legal Events

Date Code Title Description
MKEX Expiry