FR2254064A1 - Digital data transmission system - has central station which transmits composite signal conveying data and phasing-in signals for peripheral stations - Google Patents

Digital data transmission system - has central station which transmits composite signal conveying data and phasing-in signals for peripheral stations

Info

Publication number
FR2254064A1
FR2254064A1 FR7439729A FR7439729A FR2254064A1 FR 2254064 A1 FR2254064 A1 FR 2254064A1 FR 7439729 A FR7439729 A FR 7439729A FR 7439729 A FR7439729 A FR 7439729A FR 2254064 A1 FR2254064 A1 FR 2254064A1
Authority
FR
France
Prior art keywords
central station
composite signal
transmission system
signals
phasing
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.)
Granted
Application number
FR7439729A
Other languages
French (fr)
Other versions
FR2254064B1 (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.)
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
Publication of FR2254064A1 publication Critical patent/FR2254064A1/en
Application granted granted Critical
Publication of FR2254064B1 publication Critical patent/FR2254064B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/04—Speed or phase control by synchronisation signals
    • H04L7/06—Speed or phase control by synchronisation signals the synchronisation signals differing from the information signals in amplitude, polarity or frequency or length
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
    • G06F13/4204—Bus transfer protocol, e.g. handshake; Synchronisation on a parallel bus
    • G06F13/4208—Bus transfer protocol, e.g. handshake; Synchronisation on a parallel bus being a system bus, e.g. VME bus, Futurebus, Multibus
    • G06F13/4213—Bus transfer protocol, e.g. handshake; Synchronisation on a parallel bus being a system bus, e.g. VME bus, Futurebus, Multibus with asynchronous protocol

Abstract

A digital data transmission system, has a central station and one or more peripheral stations, in which the central station can send out over a channel a composite signal having at least three characteristic combinations of polarity and level, permitting the simultaneous conveyance of clock information and useful data to the sub-stations. Each substation has a clock generator which can be phased in by a specific combination of central station signals as well as circuits for the separation of data according to phase, to derive useful data from the composite signal which is transmitted periodically at a specific phase position of the composite signal; the sub-station can also transmit data block to the central station at appropriate phase positions.
FR7439729A 1973-12-08 1974-10-16 Digital data transmission system - has central station which transmits composite signal conveying data and phasing-in signals for peripheral stations Granted FR2254064A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5698973 1973-12-08

Publications (2)

Publication Number Publication Date
FR2254064A1 true FR2254064A1 (en) 1975-07-04
FR2254064B1 FR2254064B1 (en) 1977-03-25

Family

ID=10478060

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7439729A Granted FR2254064A1 (en) 1973-12-08 1974-10-16 Digital data transmission system - has central station which transmits composite signal conveying data and phasing-in signals for peripheral stations

Country Status (3)

Country Link
JP (1) JPS5091202A (en)
DE (1) DE2443869A1 (en)
FR (1) FR2254064A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987005135A1 (en) * 1986-02-20 1987-08-27 Deutsche Thomson-Brandt Gmbh Method for data exchange between a first and a second processor

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2316674A1 (en) * 1975-07-04 1977-01-28 Cit Alcatel MULTIPLE PULSATION SIMULTANEOUS TRANSMISSION SYSTEM
JPH0769925B2 (en) * 1987-05-29 1995-07-31 日本電気株式会社 Information collection system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987005135A1 (en) * 1986-02-20 1987-08-27 Deutsche Thomson-Brandt Gmbh Method for data exchange between a first and a second processor
EP0239155A1 (en) * 1986-02-20 1987-09-30 Deutsche Thomson-Brandt GmbH Data transfer method between a first and a second processor

Also Published As

Publication number Publication date
FR2254064B1 (en) 1977-03-25
DE2443869A1 (en) 1975-06-12
JPS5091202A (en) 1975-07-21

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Legal Events

Date Code Title Description
ST Notification of lapse