FR2452207A1 - Device coupling transmitter to transmission line - includes transformer secondary whose impedance is reduced from high to low value by short circuiting primary when transmitter is active - Google Patents

Device coupling transmitter to transmission line - includes transformer secondary whose impedance is reduced from high to low value by short circuiting primary when transmitter is active

Info

Publication number
FR2452207A1
FR2452207A1 FR7907042A FR7907042A FR2452207A1 FR 2452207 A1 FR2452207 A1 FR 2452207A1 FR 7907042 A FR7907042 A FR 7907042A FR 7907042 A FR7907042 A FR 7907042A FR 2452207 A1 FR2452207 A1 FR 2452207A1
Authority
FR
France
Prior art keywords
transmitter
primary
line
transmission line
active
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
FR7907042A
Other languages
French (fr)
Other versions
FR2452207B1 (en
Inventor
Andre Martin
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.)
Societe des Telephones Ericsson SA
Original Assignee
Societe des Telephones Ericsson 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 Societe des Telephones Ericsson SA filed Critical Societe des Telephones Ericsson SA
Priority to FR7907042A priority Critical patent/FR2452207A1/en
Publication of FR2452207A1 publication Critical patent/FR2452207A1/en
Application granted granted Critical
Publication of FR2452207B1 publication Critical patent/FR2452207B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/40006—Architecture of a communication node
    • H04L12/40032—Details regarding a bus interface enhancer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/10—Current supply arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks

Abstract

An information transmission line has a number of transmitters and receivers connected for transmitting and receiving coded information along the line at frequencies between several hundred Hertz and several MHz. Each transmitter applies pulse code signals through two lines (D,D) to respective AND gates which are opened by a control signal on a control line (23) to apply the code signals through V-MOS transistors and a pulse transformer (17) to the transmission line. The connection of the pulse transformer to the line includes a control transformer secondary (18) above primary can be short circuited by two transistors (27,28) controlled by the control signal. When the transmitter is active the control transformer primary is short circuited to present negligible impedence,while when the transmitter is inactive the primary is open circuited to present a high impedence to the line and present the transmitter connection affecting the line.
FR7907042A 1979-03-20 1979-03-20 Device coupling transmitter to transmission line - includes transformer secondary whose impedance is reduced from high to low value by short circuiting primary when transmitter is active Granted FR2452207A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7907042A FR2452207A1 (en) 1979-03-20 1979-03-20 Device coupling transmitter to transmission line - includes transformer secondary whose impedance is reduced from high to low value by short circuiting primary when transmitter is active

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7907042A FR2452207A1 (en) 1979-03-20 1979-03-20 Device coupling transmitter to transmission line - includes transformer secondary whose impedance is reduced from high to low value by short circuiting primary when transmitter is active

Publications (2)

Publication Number Publication Date
FR2452207A1 true FR2452207A1 (en) 1980-10-17
FR2452207B1 FR2452207B1 (en) 1984-05-25

Family

ID=9223348

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7907042A Granted FR2452207A1 (en) 1979-03-20 1979-03-20 Device coupling transmitter to transmission line - includes transformer secondary whose impedance is reduced from high to low value by short circuiting primary when transmitter is active

Country Status (1)

Country Link
FR (1) FR2452207A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4775864A (en) * 1986-08-07 1988-10-04 Standard Microsystems Corporation Local area network with multiple node bus topology
EP0289525A1 (en) * 1986-08-22 1988-11-09 Farallon Computing Local area network interconnecting computer products via long telephone lines
US4901342A (en) * 1986-08-22 1990-02-13 Jones Reese M Local area network connecting computer products via long telephone lines
US4985903A (en) * 1988-10-18 1991-01-15 Ant Nachrichtentechnik Gmbh Bus coupling circuit
WO2003085826A2 (en) * 2002-04-04 2003-10-16 Triquint Semiconductor, Inc. Switched transformer for adjusting power amplifier loading

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2544486A1 (en) * 1975-10-04 1977-04-07 Dornier System Gmbh CIRCUIT ARRANGEMENT FOR COUPLING SEVERAL SPATIAL DISTRIBUTED TRANSMITTERS TO A COMMON SIGNAL LINE

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2544486A1 (en) * 1975-10-04 1977-04-07 Dornier System Gmbh CIRCUIT ARRANGEMENT FOR COUPLING SEVERAL SPATIAL DISTRIBUTED TRANSMITTERS TO A COMMON SIGNAL LINE

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4775864A (en) * 1986-08-07 1988-10-04 Standard Microsystems Corporation Local area network with multiple node bus topology
EP0289525A1 (en) * 1986-08-22 1988-11-09 Farallon Computing Local area network interconnecting computer products via long telephone lines
EP0289525A4 (en) * 1986-08-22 1989-04-24 Farallon Computing Local area network interconnecting computer products via long telephone lines.
US4901342A (en) * 1986-08-22 1990-02-13 Jones Reese M Local area network connecting computer products via long telephone lines
US4985903A (en) * 1988-10-18 1991-01-15 Ant Nachrichtentechnik Gmbh Bus coupling circuit
WO2003085826A2 (en) * 2002-04-04 2003-10-16 Triquint Semiconductor, Inc. Switched transformer for adjusting power amplifier loading
WO2003085826A3 (en) * 2002-04-04 2004-10-28 Triquint Semiconductor Inc Switched transformer for adjusting power amplifier loading
US7102464B1 (en) 2002-04-04 2006-09-05 Triquint Semiconductor, Inc. Switched transformer for adjusting power amplifier loading

Also Published As

Publication number Publication date
FR2452207B1 (en) 1984-05-25

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Legal Events

Date Code Title Description
ST Notification of lapse