FR1561522A - - Google Patents

Info

Publication number
FR1561522A
FR1561522A FR1561522DA FR1561522A FR 1561522 A FR1561522 A FR 1561522A FR 1561522D A FR1561522D A FR 1561522DA FR 1561522 A FR1561522 A FR 1561522A
Authority
FR
France
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
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 filed Critical
Application granted granted Critical
Publication of FR1561522A publication Critical patent/FR1561522A/fr
Expired legal-status Critical Current

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
    • G11B20/10009—Improvement or modification of read or write signals
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Digital Magnetic Recording (AREA)
FR1561522D 1967-03-09 1968-03-07 Expired FR1561522A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US62184367A 1967-03-09 1967-03-09

Publications (1)

Publication Number Publication Date
FR1561522A true FR1561522A (fr) 1969-03-28

Family

ID=24491877

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1561522D Expired FR1561522A (fr) 1967-03-09 1968-03-07

Country Status (5)

Country Link
US (1) US3505537A (fr)
JP (1) JPS4539864B1 (fr)
DE (1) DE1616547A1 (fr)
FR (1) FR1561522A (fr)
GB (1) GB1177192A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2376582A1 (fr) * 1976-12-30 1978-07-28 Sperry Rand Corp Circuits detecteurs de signal du type a canal double
FR2447554A1 (fr) * 1979-01-25 1980-08-22 Enertec Detecteur de seuil pour le controle d'une grandeur alternative

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3573637A (en) * 1969-07-22 1971-04-06 Stromberg Datagraphix Inc Timing system with output representing predetermined and constant phase displacement from variable requency input
US3600688A (en) * 1970-04-21 1971-08-17 Bethlehem Steel Corp Signal discriminator circuit
DE2021456B2 (de) * 1970-05-02 1972-07-20 Philips Patentverwaltung Gmbh, 2000 Hamburg Schaltungsanordnung zur digitalen abtast-dreipunktregelung
BE788895A (fr) * 1971-09-17 1973-03-15 Siemens Ag Montage pour identifier sans defaut les passages par le zero des signaux de lecture de memoires a couches magnetiques
DE2229493C2 (de) * 1972-06-16 1974-06-12 Siemens Ag, 1000 Berlin Und 8000 Muenchen Schaltungsanordnung zur Unterdrückung von Störimpulsen
US3863160A (en) * 1973-05-07 1975-01-28 Edward Neal Doty Method and apparatus for finding the center amplitude of each pulse of a train of random amplitude asymmetric pulses
US4080574A (en) * 1974-01-31 1978-03-21 United Kingdom Atomic Energy Authority Apparatus for providing time reference signals
GB1495389A (en) * 1974-01-31 1977-12-14 Atomic Energy Authority Uk Apparatus for providing time reference signals
US3944936A (en) * 1974-08-07 1976-03-16 Rca Corporation Zero crossover detector
DE2537264C3 (de) * 1975-08-21 1978-10-05 Siemens Ag, 1000 Berlin Und 8000 Muenchen Schaltungsanordnung zum Erkennen der Null-Durchgänge von Signalen
US4165491A (en) * 1976-11-08 1979-08-21 Sperry Rand Corporation Circuit for detecting zero crossing points for data signal
JPS5394756A (en) * 1976-12-28 1978-08-19 Torio Kk Pulse shaping circuit
US4306194A (en) * 1979-10-11 1981-12-15 International Business Machines Corporation Data signal detection circuit
US4336467A (en) * 1980-01-31 1982-06-22 Bell Telephone Laboratories, Incorporated Voltage detector
US4611126A (en) * 1984-10-04 1986-09-09 Werkzeugmaschinenfabrik Oerlikon-Buehrle Ag Power on/off reset generator
US4922757A (en) * 1988-06-13 1990-05-08 Westinghouse Electric Corp. Apparatus for precise detection of blade passing times in a steam turbine
US5120985A (en) * 1989-01-31 1992-06-09 Fujitsu Limited Data reproducing circuit for correcting amplitude variation and peak shift

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3041475A (en) * 1958-03-13 1962-06-26 Gen Dynamics Corp Electronic polar relay
US3277311A (en) * 1963-06-10 1966-10-04 Barnes Eng Co Pulse width discriminator scanner circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2376582A1 (fr) * 1976-12-30 1978-07-28 Sperry Rand Corp Circuits detecteurs de signal du type a canal double
FR2447554A1 (fr) * 1979-01-25 1980-08-22 Enertec Detecteur de seuil pour le controle d'une grandeur alternative

Also Published As

Publication number Publication date
US3505537A (en) 1970-04-07
JPS4539864B1 (fr) 1970-12-15
DE1616547A1 (de) 1972-03-02
GB1177192A (en) 1970-01-07

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Legal Events

Date Code Title Description
ST Notification of lapse