CA1037570A - Demodulateur pour impulsions modulees en frequence - Google Patents

Demodulateur pour impulsions modulees en frequence

Info

Publication number
CA1037570A
CA1037570A CA179,117A CA179117A CA1037570A CA 1037570 A CA1037570 A CA 1037570A CA 179117 A CA179117 A CA 179117A CA 1037570 A CA1037570 A CA 1037570A
Authority
CA
Canada
Prior art keywords
circuitry
circuit
manifestations
data
comparing
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
CA179,117A
Other languages
English (en)
Other versions
CA179117S (en
Inventor
William A. Boothroyd
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
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Application granted granted Critical
Publication of CA1037570A publication Critical patent/CA1037570A/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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K9/00—Demodulating pulses which have been modulated with a continuously-variable signal
    • H03K9/06—Demodulating pulses which have been modulated with a continuously-variable signal of frequency- or rate-modulated pulses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/4902—Pulse width modulation; Pulse position modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/4904—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using self-synchronising codes, e.g. split-phase codes

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Manipulation Of Pulses (AREA)
  • Analogue/Digital Conversion (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Dc Digital Transmission (AREA)
  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
CA179,117A 1972-09-07 1973-08-16 Demodulateur pour impulsions modulees en frequence Expired CA1037570A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US28713272A 1972-09-07 1972-09-07

Publications (1)

Publication Number Publication Date
CA1037570A true CA1037570A (fr) 1978-08-29

Family

ID=23101591

Family Applications (1)

Application Number Title Priority Date Filing Date
CA179,117A Expired CA1037570A (fr) 1972-09-07 1973-08-16 Demodulateur pour impulsions modulees en frequence

Country Status (9)

Country Link
JP (1) JPS4966116A (fr)
BE (1) BE804062A (fr)
CA (1) CA1037570A (fr)
CH (1) CH573691A5 (fr)
FR (1) FR2199231B1 (fr)
GB (1) GB1442444A (fr)
IT (1) IT992697B (fr)
NL (1) NL7311473A (fr)
SE (1) SE392551B (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5789769A (en) * 1980-11-26 1982-06-04 Nippon Denso Co Ltd Controller for copying machine group
CN114090482B (zh) * 2021-09-28 2024-06-07 荣湃半导体（上海）有限公司 一种传输数据的延迟抵消方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3631422A (en) * 1969-02-03 1971-12-28 Ibm System for detection of data time interval measurement
US3711843A (en) * 1970-04-27 1973-01-16 Olivetti & Co Spa Self-adapting synchronization system for reading information from a moving support
US3708748A (en) * 1970-04-27 1973-01-02 Ibm Retrospective pulse modulation and apparatus therefor
US3720927A (en) * 1971-01-25 1973-03-13 Redactron Corp Speed insensitive reading and writing apparatus for digital information
FR2136906B1 (fr) * 1971-05-07 1975-07-04 Automatisme Cie Gle
JPS4861122A (fr) * 1971-12-02 1973-08-27

Also Published As

Publication number Publication date
BE804062A (fr) 1973-12-17
IT992697B (it) 1975-09-30
DE2343472A1 (de) 1974-03-28
SE392551B (sv) 1977-03-28
FR2199231A1 (fr) 1974-04-05
CH573691A5 (fr) 1976-03-15
NL7311473A (fr) 1974-03-11
JPS4966116A (fr) 1974-06-26
DE2343472B2 (de) 1975-08-21
GB1442444A (en) 1976-07-14
FR2199231B1 (fr) 1976-05-07

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