FR2416600A1 - Circuit de ligne telephonique - Google Patents

Circuit de ligne telephonique

Info

Publication number
FR2416600A1
FR2416600A1 FR7822336A FR7822336A FR2416600A1 FR 2416600 A1 FR2416600 A1 FR 2416600A1 FR 7822336 A FR7822336 A FR 7822336A FR 7822336 A FR7822336 A FR 7822336A FR 2416600 A1 FR2416600 A1 FR 2416600A1
Authority
FR
France
Prior art keywords
output
wire
nape
tip
inputs
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
FR7822336A
Other languages
English (en)
Other versions
FR2416600B1 (fr
Inventor
Michael C J Cowpland
Patrick R Beirne
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.)
Microsemi Semiconductor ULC
Original Assignee
Mitel 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
Priority claimed from CA296,137A external-priority patent/CA1105162A/fr
Application filed by Mitel Corp filed Critical Mitel Corp
Publication of FR2416600A1 publication Critical patent/FR2416600A1/fr
Application granted granted Critical
Publication of FR2416600B1 publication Critical patent/FR2416600B1/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/005—Interface circuits for subscriber lines
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Amplifiers (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

Le circuit de ligne téléphonique comprend une ligne équilibrée à fils de pointe et nuque à relier à un poste téléphonique, et un fil de ligne de sortie non équilibré. Une premier amplificateur différentiel 10 a ses entrées reliées par des résistances égales aux fils de pointe et nuque. Ces résistances valent dix fois l'impédance du poste décroché. Un amplificateur intermédiaire 17 a son entrée reliée par un premier trajet à la sortie de 10 et sa sortie reliée par un deuxième trajet au fil de ligne de sortie. Un amplificateur différentiel 34 a ses entrées reliées aux premier et deuxième trajets. La sortie de 34 est reliée au fil de pointe et l'entrée de 10 reliée au fil de nuque par une résistance dont la valeur est choisie pour obtenir une compensation. 34 a des gains différents pour les signaux appliqués à ses entrées.
FR7822336A 1978-02-01 1978-07-24 Circuit de ligne telephonique Expired FR2416600B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA296,137A CA1105162A (fr) 1979-06-23 1978-02-01 Circuit telephonique

Publications (2)

Publication Number Publication Date
FR2416600A1 true FR2416600A1 (fr) 1979-08-31
FR2416600B1 FR2416600B1 (fr) 1986-06-13

Family

ID=4110680

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7822336A Expired FR2416600B1 (fr) 1978-02-01 1978-07-24 Circuit de ligne telephonique

Country Status (5)

Country Link
US (1) US4178485A (fr)
JP (2) JPS5921237B2 (fr)
DE (1) DE2824468C2 (fr)
FR (1) FR2416600B1 (fr)
GB (1) GB2014398B (fr)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4281219A (en) * 1978-02-01 1981-07-28 Mitel Corporation Telephone line circuit
NL7807706A (nl) * 1978-07-19 1980-01-22 Philips Nv Voedingsbrug met d.c.-compensatie voor beide richtin- gen van de voedingstroom.
JPS5680993A (en) * 1979-12-05 1981-07-02 Fujitsu Ltd State monitor system
EP0037518B1 (fr) * 1980-04-04 1984-02-15 Siemens Aktiengesellschaft Circuit hybride sans transformateur
US4485277A (en) * 1980-04-04 1984-11-27 Siemens Corporation Apparatus for transmitting and/or receiving balanced signals on a two-wire telecommunication line
US4682356A (en) * 1980-04-04 1987-07-21 Siemens Corporation Apparatus for transmitting and/or receiving balanced signals on a two-wire telecommunication line
JPS5758495A (en) * 1980-09-25 1982-04-08 Nec Corp Subscriber circuit device
JPS5773589A (en) * 1980-10-27 1982-05-08 Oki Electric Ind Co Ltd Subscriber's circuit
US4322586A (en) * 1980-11-13 1982-03-30 Northern Telecom Limited Transformerless line interface circuit
FR2501940B1 (fr) * 1981-03-11 1985-07-19 Trt Telecom Radio Electr Detecteur de boucle peu sensible aux tensions longitudinales
GB2120498B (en) * 1982-04-29 1985-11-20 Motorola Inc Regulator circuit
US4524246A (en) * 1982-07-07 1985-06-18 Harris Corporation SLIC II--common-mode current rejection
CA1182230A (fr) * 1982-12-17 1985-02-05 Patrick R. Beirne Circuit d'interface pour ligne d'abonne
US4567328A (en) * 1984-05-23 1986-01-28 Burroughs Corp. Energy detection circuit for a facsimile system controller
JPS61142575U (fr) * 1985-02-25 1986-09-03
CA1231480A (fr) * 1985-03-15 1988-01-12 John A. Barsellotti Circuit de ligne a courant constant
US4866768A (en) * 1985-06-26 1989-09-12 Siemens Corporate Research & Support, Inc. Station line interface circuit for a telecommunication network
US5172409A (en) * 1990-07-02 1992-12-15 Motorola, Inc. Precision FET control loop
US6735657B1 (en) * 2000-06-30 2004-05-11 Cisco Technology, Inc. Method and apparatus for connecting two-wire serial interface and single-wire serial interface with high transmission speed
DE10142612A1 (de) * 2001-08-31 2003-04-03 Siemens Ag Verfahren und Vorrichtung zur einadrigen, lokalen Übertragung von PCM-Signalen ohne Übertrager
EP1802088A1 (fr) * 2005-12-23 2007-06-27 BRITISH TELECOMMUNICATIONS public limited company Interface de télécommunications pour sonnerie non équilibrée
US8246384B1 (en) * 2008-07-25 2012-08-21 Wallace Henry B Variable capacitance audio cable

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3824344A (en) * 1973-03-22 1974-07-16 Bell Telephone Labor Inc Conference bridge circuit
US3889072A (en) * 1973-10-19 1975-06-10 Itt Bi-directional amplification apparatus
FR2312145A1 (fr) * 1975-05-23 1976-12-17 Western Electric Co Circuit pour servir d'interface entre deux parties d'une voie de communication
US4064377A (en) * 1976-03-11 1977-12-20 Wescom Switching, Inc. Electronic hybrid and hybrid repeater

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1461207A (en) * 1975-04-01 1977-01-13 Standard Telephones Cables Ltd Electrical circuit for indicating the presence and direction of flow of an electrical current
US4007335A (en) * 1975-11-12 1977-02-08 Bell Telephone Laboratories, Incorporated Telephone line battery feed circuit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3824344A (en) * 1973-03-22 1974-07-16 Bell Telephone Labor Inc Conference bridge circuit
US3889072A (en) * 1973-10-19 1975-06-10 Itt Bi-directional amplification apparatus
FR2312145A1 (fr) * 1975-05-23 1976-12-17 Western Electric Co Circuit pour servir d'interface entre deux parties d'une voie de communication
US4064377A (en) * 1976-03-11 1977-12-20 Wescom Switching, Inc. Electronic hybrid and hybrid repeater

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/75 *

Also Published As

Publication number Publication date
JPS5844853A (ja) 1983-03-15
FR2416600B1 (fr) 1986-06-13
US4178485A (en) 1979-12-11
GB2014398B (en) 1983-01-12
DE2824468A1 (de) 1979-08-02
DE2824468C2 (de) 1984-07-12
JPS54104712A (en) 1979-08-17
JPS5921237B2 (ja) 1984-05-18
JPS5853556B2 (ja) 1983-11-30
GB2014398A (en) 1979-08-22

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Legal Events

Date Code Title Description
ST Notification of lapse