FR2354665B3 - - Google Patents

Info

Publication number
FR2354665B3
FR2354665B3 FR7717393A FR7717393A FR2354665B3 FR 2354665 B3 FR2354665 B3 FR 2354665B3 FR 7717393 A FR7717393 A FR 7717393A FR 7717393 A FR7717393 A FR 7717393A FR 2354665 B3 FR2354665 B3 FR 2354665B3
Authority
FR
France
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
FR7717393A
Other versions
FR2354665A1 (fr
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 Standard Electric Corp
Original Assignee
International 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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of FR2354665A1 publication Critical patent/FR2354665A1/fr
Application granted granted Critical
Publication of FR2354665B3 publication Critical patent/FR2354665B3/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • 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)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
FR7717393A 1976-06-07 1977-06-07 Differentiel de couplage sans transformateur de circuits deux fils et quatre fils Granted FR2354665A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/694,027 US4041252A (en) 1976-06-07 1976-06-07 Transformerless two-wire/four-wire hybrid with DC sourcing capability

Publications (2)

Publication Number Publication Date
FR2354665A1 FR2354665A1 (fr) 1978-01-06
FR2354665B3 true FR2354665B3 (fr) 1980-03-07

Family

ID=24787114

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7717393A Granted FR2354665A1 (fr) 1976-06-07 1977-06-07 Differentiel de couplage sans transformateur de circuits deux fils et quatre fils

Country Status (3)

Country Link
US (1) US4041252A (fr)
CA (1) CA1084185A (fr)
FR (1) FR2354665A1 (fr)

Families Citing this family (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4064377A (en) * 1976-03-11 1977-12-20 Wescom Switching, Inc. Electronic hybrid and hybrid repeater
US4203012A (en) * 1977-07-14 1980-05-13 Boxall Frank S Hybrid circuit using current mirror circuits
US4203009A (en) * 1977-08-17 1980-05-13 The 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
US4142075A (en) * 1977-10-11 1979-02-27 Burr-Brown Research Corporation Interface circuit and method for telephone extension lines
FR2437757A2 (fr) * 1978-06-26 1980-04-25 Trt Telecom Radio Electr Joncteur d'abonne destine a assurer un couplage en deux fils ou quatre fils avec un central telephonique
FR2437116A1 (fr) * 1978-09-19 1980-04-18 Thomson Ericsson Telephones So Dispositif de separation et d'equilibrage pour autocommutateurs telephoniques
NL7810086A (nl) * 1978-10-06 1980-04-09 Philips Nv Voedingsbrug voor een abonneestroomloop.
US4278847A (en) * 1979-02-26 1981-07-14 Tii Corporation Transformerless hybrid circuits
US4433215A (en) * 1979-02-26 1984-02-21 Tii Corporation Solid state hybrid circuits
US4272656A (en) * 1979-04-05 1981-06-09 Precision Monolithics, Inc. Quasi-resistive battery feed for telephone circuits
NL7903664A (nl) * 1979-05-10 1980-11-12 Philips Nv Lijncircuit.
NL7903662A (nl) * 1979-05-10 1980-11-12 Philips Nv Lijncircuit.
NL7904159A (nl) * 1979-05-28 1980-12-02 Philips Nv Inrichting voor het toevoeren van signalen aan een telefoonlijn.
US4375015A (en) * 1979-06-04 1983-02-22 Tellabs, Inc. Improved electronic hybrid circuit
US4331842A (en) * 1980-02-11 1982-05-25 Reliance Electric Company Voice frequency repeater and term sets and other circuits therefor
FR2478908B1 (fr) * 1980-03-21 1984-08-03 Thomson Csf Mat Tel
DE3108647C2 (de) * 1980-04-04 1983-01-20 Siemens AG, 1000 Berlin und 8000 München Übertragerlose Gabelschaltung für die Teilnehmerschaltung einer Fernmelde-, insbesondere Fernsprechvermittlungsanlage
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
US4322586A (en) * 1980-11-13 1982-03-30 Northern Telecom Limited Transformerless line interface circuit
CA1154185A (fr) * 1981-01-23 1983-09-20 Patrick R. Beirne Circuit d'interface pour ligne d'abonne
DE3142201C2 (de) * 1981-01-23 1984-02-23 Mitel Corp., Kanata, Ontario Gabelschaltung für eine Fernmelde-, insbesondere Fernsprechanlage
US4388500A (en) * 1981-02-27 1983-06-14 Wescom, Inc. Electronic hybrid
CA1177985A (fr) * 1981-09-24 1984-11-13 Don W. Zobel Circuit de raccordement electronique
US4431874A (en) * 1981-09-24 1984-02-14 Motorola, Inc. Balanced current multiplier circuit for a subscriber loop interface circuit
US4445002A (en) * 1981-12-28 1984-04-24 Mostek Corporation Sidetone circuit
US4554416A (en) * 1983-03-08 1985-11-19 The United States Of America As Represented By The Secretary Of The Air Force Low voltage two wire to four wire telephone circuit converter apparatus
US4558186A (en) * 1983-09-06 1985-12-10 Gte Automatic Electric Incorporated Single power supply battery feed circuit
FR2564678B1 (fr) * 1984-05-18 1986-09-12 Thomson Csf Mat Tel Interface de liaison de circuit d'abonne pour autocommutateur telephonique
JP2912388B2 (ja) * 1989-08-15 1999-06-28 沖電気工業株式会社 加入者回路
US5953412A (en) * 1996-09-04 1999-09-14 Teltrend, Inc. Method and apparatus for controlling line conditioner equalizer
US6111949A (en) * 1996-09-04 2000-08-29 Teltrend, Inc. Method of rapid automatic hybrid balancing
US5974137A (en) * 1996-09-04 1999-10-26 Teltrend, Inc. AGC amplifier for two-wire line conditioner
US5963638A (en) 1996-09-04 1999-10-05 Teltrend, Inc. Adjustable hybrid having improved biasing configuration
FI104134B (fi) * 1997-07-31 1999-11-15 Nokia Networks Oy Datan- ja virransyötön toteuttava kaapeliliitäntä
DE19807074A1 (de) 1998-02-20 1999-09-02 Philips Patentverwaltung Gabelverstärker
US6792105B1 (en) * 2000-10-31 2004-09-14 3Com Corporation Current-mode differential active hybrid circuit
US8385538B2 (en) * 2008-12-10 2013-02-26 Utc Fire & Security Americas Corporation, Inc. Method, system, and apparatus for a differential transformer-free hybrid circuit
US8742814B2 (en) 2009-07-15 2014-06-03 Yehuda Binder Sequentially operated modules

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2157150A5 (fr) * 1971-10-20 1973-06-01 Labo Cent Telecommunicat
FR2160308B1 (fr) * 1971-11-19 1977-01-28 Labo Cent Telecommunicat
US3973089A (en) * 1973-10-29 1976-08-03 General Electric Company Adaptive hybrid circuit
US3970805A (en) * 1974-02-22 1976-07-20 Gte Automatic Electric (Canada) Limited Active hybrid circuit

Also Published As

Publication number Publication date
US4041252A (en) 1977-08-09
CA1084185A (fr) 1980-08-19
FR2354665A1 (fr) 1978-01-06

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Legal Events

Date Code Title Description
TP Transmission of property