FR1384265A - Système de lecture à modulation de phase - Google Patents

Système de lecture à modulation de phase

Info

Publication number
FR1384265A
FR1384265A FR959789A FR959789A FR1384265A FR 1384265 A FR1384265 A FR 1384265A FR 959789 A FR959789 A FR 959789A FR 959789 A FR959789 A FR 959789A FR 1384265 A FR1384265 A FR 1384265A
Authority
FR
France
Prior art keywords
phase modulation
reading system
modulation reading
phase
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
Application number
FR959789A
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.)
Sperry Corp
Original Assignee
Sperry Rand 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
Priority claimed from US253381A external-priority patent/US3159793A/en
Application filed by Sperry Rand Corp filed Critical Sperry Rand Corp
Priority to FR959789A priority Critical patent/FR1384265A/fr
Application granted granted Critical
Publication of FR1384265A publication Critical patent/FR1384265A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/02—Details
    • 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)
FR959789A 1963-01-23 1964-01-09 Système de lecture à modulation de phase Expired FR1384265A (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR959789A FR1384265A (fr) 1963-01-23 1964-01-09 Système de lecture à modulation de phase

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US253381A US3159793A (en) 1963-01-23 1963-01-23 Phase modulation reading system employing controlled gating for inhibiting spurious outputs occurring between information pulses
FR959789A FR1384265A (fr) 1963-01-23 1964-01-09 Système de lecture à modulation de phase

Publications (1)

Publication Number Publication Date
FR1384265A true FR1384265A (fr) 1965-01-04

Family

ID=26205278

Family Applications (1)

Application Number Title Priority Date Filing Date
FR959789A Expired FR1384265A (fr) 1963-01-23 1964-01-09 Système de lecture à modulation de phase

Country Status (1)

Country Link
FR (1) FR1384265A (fr)

Similar Documents

Publication Publication Date Title
BE611136A (fr) Système de lecture à modulation de phase
CH433440A (fr) Système de transmission de données
FR1381895A (fr) Système amplificateur
FR1443419A (fr) Système démodulateur à modulation de fréquence
FR1394485A (fr) Système de transmission de données
CH418414A (fr) Système radar
CH452944A (fr) Système de lecture de caractères
FR1500473A (fr) Système de lecture de caractères
FR1384265A (fr) Système de lecture à modulation de phase
FR1547812A (fr) Système de lecture magnéto-optique à modulation
FR89883E (fr) Système de verrouillage de données
FR1420792A (fr) Système de lecture de caractères
FR1398999A (fr) Système de transmission à modulation de phase
FR1415415A (fr) Système à modulation de fréquence
FR1412494A (fr) Système de lecture de caractères
FR1358795A (fr) Système de lentilles perfectionné
FR1417480A (fr) Système de transmission de données
FR1404071A (fr) Système de transmission de données
FR1368846A (fr) Système de reproduction magnétique
FR1331656A (fr) Système de transmission à modulation de phase
ES100964Y (es) Armario archivador de planos
FR1394290A (fr) Système diviseur de voies télégraphiques
FR1420040A (fr) Système de sélection de fréquences
FR1338620A (fr) Système à données de position
FR1414612A (fr) Lecture de données codées en phase