BE790216A - Circuit de conversion deux fils - quatre fils totalement electronique - Google Patents

Circuit de conversion deux fils - quatre fils totalement electronique

Info

Publication number
BE790216A
BE790216A BE790216A BE790216A BE790216A BE 790216 A BE790216 A BE 790216A BE 790216 A BE790216 A BE 790216A BE 790216 A BE790216 A BE 790216A BE 790216 A BE790216 A BE 790216A
Authority
BE
Belgium
Prior art keywords
wire
conversion circuit
fully electronic
circuit fully
electronic
Prior art date
Application number
BE790216A
Other languages
English (en)
French (fr)
Inventor
J S Colardelle
P Girard
C P H Lerouge
Original Assignee
Int Standard Electric 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 Int Standard Electric Corp filed Critical Int Standard Electric Corp
Publication of BE790216A publication Critical patent/BE790216A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • H04Q3/52—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements
    • H04Q3/521—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements using semiconductors in the switching stages
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/54—Circuits using the same frequency for two directions of communication
    • H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
    • H04B1/586—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa using an electronic circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/20—Repeater circuits; Relay circuits
    • H04L25/22—Repeaters for converting two wires to four wires; Repeaters for converting single current to double current
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/001—Current supply source at the exchanger providing current to substations
    • H04M19/005—Feeding arrangements without the use of line transformers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Emergency Protection Circuit Devices (AREA)
BE790216A 1971-10-20 1972-10-18 Circuit de conversion deux fils - quatre fils totalement electronique BE790216A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7137599A FR2157150A5 (xx) 1971-10-20 1971-10-20

Publications (1)

Publication Number Publication Date
BE790216A true BE790216A (fr) 1973-04-18

Family

ID=9084622

Family Applications (1)

Application Number Title Priority Date Filing Date
BE790216A BE790216A (fr) 1971-10-20 1972-10-18 Circuit de conversion deux fils - quatre fils totalement electronique

Country Status (6)

Country Link
US (1) US3886322A (xx)
AU (1) AU474545B2 (xx)
BE (1) BE790216A (xx)
DE (1) DE2250859C2 (xx)
FR (1) FR2157150A5 (xx)
GB (1) GB1389559A (xx)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH599731A5 (xx) * 1976-03-02 1978-05-31 Ibm
US4041252A (en) * 1976-06-07 1977-08-09 North Electric Company Transformerless two-wire/four-wire hybrid with DC sourcing capability
ZA784547B (en) * 1977-08-17 1979-08-29 Post Office Unbalanced/balanced converter circuits
FR2404344A1 (fr) * 1977-09-27 1979-04-20 Jeumont Schneider Equipement electronique d'abonne, a circuit de conversion deux fils-quatre fils, pour central telephonique
US4241239A (en) * 1978-02-24 1980-12-23 International Telephone And Telegraph Corporation Fluxbucking line transformer with electronic equivalent line terminating impedance
US4214130A (en) * 1978-03-10 1980-07-22 Teltone Corporation Signal coupler
US4292478A (en) * 1979-05-25 1981-09-29 Plessey Canada Limited Interface circuits
DE3014187C2 (de) * 1980-04-14 1983-11-17 Nixdorf Computer Ag, 4790 Paderborn Schaltungsanordnung zum zweidrähtigen Anschluß eines Fernsprechteilnehmers an je eine Leitung für angehende und ankommende Signale
FR2577367B1 (fr) * 1985-02-13 1988-03-11 Alsatel Radio Telecommunicatio Dispositif de communication radiotelephonique

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3530260A (en) * 1966-12-23 1970-09-22 Bell Telephone Labor Inc Transistor hybrid circuit
GB1190521A (en) * 1967-02-25 1970-05-06 Nippon Telegraph & Telephone Improvements in or relating to Telephone Circuits
FR2063475A5 (xx) * 1969-10-17 1971-07-09 Labo Cent Telecommunicat
NL7000395A (xx) * 1970-01-13 1971-07-15
JPS5211166B1 (xx) * 1970-07-23 1977-03-29

Also Published As

Publication number Publication date
AU4739172A (en) 1974-04-11
DE2250859C2 (de) 1984-05-24
FR2157150A5 (xx) 1973-06-01
US3886322A (en) 1975-05-27
AU474545B2 (en) 1976-07-29
GB1389559A (en) 1975-04-03
DE2250859A1 (de) 1973-04-26

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