FR1387879A - Arrangement de commande d'écriture en modulation de phase - Google Patents

Arrangement de commande d'écriture en modulation de phase

Info

Publication number
FR1387879A
FR1387879A FR952688A FR952688A FR1387879A FR 1387879 A FR1387879 A FR 1387879A FR 952688 A FR952688 A FR 952688A FR 952688 A FR952688 A FR 952688A FR 1387879 A FR1387879 A FR 1387879A
Authority
FR
France
Prior art keywords
phase modulation
write control
control arrangement
modulation write
arrangement
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
FR952688A
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.)
Compagnie des Machines Bull SA
Original Assignee
Compagnie des Machines Bull SA
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 Compagnie des Machines Bull SA filed Critical Compagnie des Machines Bull SA
Priority to FR952688A priority Critical patent/FR1387879A/fr
Priority to US406525A priority patent/US3345638A/en
Priority to BE654875D priority patent/BE654875A/xx
Application granted granted Critical
Publication of FR1387879A publication Critical patent/FR1387879A/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
    • G11B20/14—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)
  • Digital Magnetic Recording (AREA)
FR952688A 1963-11-05 1963-11-05 Arrangement de commande d'écriture en modulation de phase Expired FR1387879A (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR952688A FR1387879A (fr) 1963-11-05 1963-11-05 Arrangement de commande d'écriture en modulation de phase
US406525A US3345638A (en) 1963-11-05 1964-10-26 Phase modulation binary recording system
BE654875D BE654875A (fr) 1963-11-05 1964-10-27

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR952688A FR1387879A (fr) 1963-11-05 1963-11-05 Arrangement de commande d'écriture en modulation de phase

Publications (1)

Publication Number Publication Date
FR1387879A true FR1387879A (fr) 1965-02-05

Family

ID=8815812

Family Applications (1)

Application Number Title Priority Date Filing Date
FR952688A Expired FR1387879A (fr) 1963-11-05 1963-11-05 Arrangement de commande d'écriture en modulation de phase

Country Status (3)

Country Link
US (1) US3345638A (fr)
BE (1) BE654875A (fr)
FR (1) FR1387879A (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3482228A (en) * 1965-10-21 1969-12-02 Sperry Rand Corp Write circuit for a phase modulation system
US3518648A (en) * 1966-11-07 1970-06-30 Subscription Television Inc High density record and reproduce system
GB1143694A (fr) * 1966-11-14
US3631429A (en) * 1968-11-19 1971-12-28 Pacific Micronetics Inc System for reproducibly storing digital data
US3879342A (en) * 1973-12-28 1975-04-22 Honeywell Inf Systems Pre-recorded digital data compensation system
US4218770A (en) * 1978-09-08 1980-08-19 Bell Telephone Laboratories, Incorporated Delay modulation data transmission system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3159840A (en) * 1960-11-14 1964-12-01 Honeywell Inc Pattern sensitivity compensation in high pulse density recording
US3235855A (en) * 1961-10-02 1966-02-15 Honeywell Inc Binary magnetic recording apparatus
US3237176A (en) * 1962-01-26 1966-02-22 Rca Corp Binary recording system
US3299414A (en) * 1964-02-03 1967-01-17 Anelex Corp Phase modulated binary magnetic recording and reproducing system

Also Published As

Publication number Publication date
US3345638A (en) 1967-10-03
BE654875A (fr) 1965-02-15

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