FR1290172A - Frequency change autosynchronization system - Google Patents

Frequency change autosynchronization system

Info

Publication number
FR1290172A
FR1290172A FR850324A FR850324A FR1290172A FR 1290172 A FR1290172 A FR 1290172A FR 850324 A FR850324 A FR 850324A FR 850324 A FR850324 A FR 850324A FR 1290172 A FR1290172 A FR 1290172A
Authority
FR
France
Prior art keywords
autosynchronization
frequency change
frequency
change
change autosynchronization
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
FR850324A
Other languages
French (fr)
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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 US23460A external-priority patent/US3029389A/en
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Priority to FR850324A priority Critical patent/FR1290172A/en
Application granted granted Critical
Publication of FR1290172A publication Critical patent/FR1290172A/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
    • 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)
FR850324A 1960-04-20 1961-01-20 Frequency change autosynchronization system Expired FR1290172A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR850324A FR1290172A (en) 1960-04-20 1961-01-20 Frequency change autosynchronization system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US23460A US3029389A (en) 1960-04-20 1960-04-20 Frequency shifting self-synchronizing clock
FR850324A FR1290172A (en) 1960-04-20 1961-01-20 Frequency change autosynchronization system

Publications (1)

Publication Number Publication Date
FR1290172A true FR1290172A (en) 1962-04-13

Family

ID=26189000

Family Applications (1)

Application Number Title Priority Date Filing Date
FR850324A Expired FR1290172A (en) 1960-04-20 1961-01-20 Frequency change autosynchronization system

Country Status (1)

Country Link
FR (1) FR1290172A (en)

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