SE437320B - Abonnentkoppling for anslutning av en telefonledning till en telefonvexel - Google Patents

Abonnentkoppling for anslutning av en telefonledning till en telefonvexel

Info

Publication number
SE437320B
SE437320B SE7905480A SE7905480A SE437320B SE 437320 B SE437320 B SE 437320B SE 7905480 A SE7905480 A SE 7905480A SE 7905480 A SE7905480 A SE 7905480A SE 437320 B SE437320 B SE 437320B
Authority
SE
Sweden
Prior art keywords
current
impedance
value
sum
load impedance
Prior art date
Application number
SE7905480A
Other languages
English (en)
Swedish (sv)
Other versions
SE7905480L (sv
Inventor
G M M Ferrieu
Original Assignee
Trt Telecom Radio Electr
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 FR7818960A external-priority patent/FR2430153A1/fr
Application filed by Trt Telecom Radio Electr filed Critical Trt Telecom Radio Electr
Publication of SE7905480L publication Critical patent/SE7905480L/
Publication of SE437320B publication Critical patent/SE437320B/sv

Links

Classifications

    • 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)
  • Power Engineering (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
SE7905480A 1978-06-26 1979-06-21 Abonnentkoppling for anslutning av en telefonledning till en telefonvexel SE437320B (sv)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7818960A FR2430153A1 (fr) 1978-06-26 1978-06-26 Joncteur d'abonne destine a assurer sans transformateur un couplage deux fils-quatre fils
FR7827762A FR2437757A2 (fr) 1978-06-26 1978-09-28 Joncteur d'abonne destine a assurer un couplage en deux fils ou quatre fils avec un central telephonique

Publications (2)

Publication Number Publication Date
SE7905480L SE7905480L (sv) 1979-12-27
SE437320B true SE437320B (sv) 1985-02-18

Family

ID=26220644

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7905480A SE437320B (sv) 1978-06-26 1979-06-21 Abonnentkoppling for anslutning av en telefonledning till en telefonvexel

Country Status (10)

Country Link
US (1) US4275277A ( )
JP (1) JPS6030468B2 ( )
AU (1) AU521488B2 ( )
BE (1) BE877247A ( )
CA (1) CA1137666A ( )
CH (1) CH648170A5 ( )
DE (1) DE2925000C2 ( )
FR (1) FR2437757A2 ( )
GB (1) GB2024564B ( )
SE (1) SE437320B ( )

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2460078B1 (fr) * 1979-06-25 1986-12-12 Trt Telecom Radio Electr Joncteur d'abonne electronique
US4359609A (en) * 1980-06-20 1982-11-16 Advanced Micro Devices, Inc. Circuit with feedback for controlling the impedance thereof
NL8004970A (nl) * 1980-09-02 1982-04-01 Philips Nv Inrichting voor het uitwisselen van signalen tussen gescheiden schakelinginrichtingen.
NL8100242A (nl) * 1981-01-20 1982-08-16 Philips Nv Overspanningsbeveiliging van een lijncircuit.
IT1211072B (it) * 1981-06-30 1989-09-29 Ates Componenti Elettron Circuito raddrizzatore a ponte di transistori per uso telefonico.
GB2104330A (en) * 1981-08-19 1983-03-02 Texas Instruments Ltd Improvements in or relating to amplifiers
CA1177985A (en) * 1981-09-24 1984-11-13 Don W. Zobel Electronic terminator circuit
US4431874A (en) * 1981-09-24 1984-02-14 Motorola, Inc. Balanced current multiplier circuit for a subscriber loop interface circuit
US4524246A (en) * 1982-07-07 1985-06-18 Harris Corporation SLIC II--common-mode current rejection
US4665547A (en) * 1984-11-02 1987-05-12 At&T Company Limiting amplifier for common mode feedback in telephone line feed circuits
IT1215254B (it) * 1985-03-20 1990-01-31 Ates Componenti Elettron Circuito, integrabile monoliticamente, per la misura di correnti longitudinali e trasversali in una linea ditrasmissione bifilare.
IT1214603B (it) * 1985-04-30 1990-01-18 Ates Componenti Elettron Circuito telefonico, integrabile monoliticamente, perl'alimentazione di una linea telefonica d'utente.
AU574277B2 (en) * 1985-08-20 1988-06-30 Fujitsu Limited Subscriber line interface circuit
JPH0618396B2 (ja) * 1989-07-03 1994-03-09 ローム株式会社 電話機用電源回路
US5175764A (en) * 1990-10-18 1992-12-29 Ag Communication Systems Corporation Enhanced high voltage line interface circuit

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1583825A ( ) * 1968-04-19 1969-12-05
NL7208148A ( ) * 1972-06-15 1973-12-18
US4004109A (en) * 1975-05-09 1977-01-18 Boxall Frank S Hybrid circuit
DE2556157C3 (de) * 1975-12-11 1979-01-18 Deutsche Telephonwerke Und Kabelindustrie Ag, 1000 Berlin Schaltungsanordnung für eine elektronische Teilnehmerspeisung
US4064377A (en) * 1976-03-11 1977-12-20 Wescom Switching, Inc. Electronic hybrid and hybrid repeater
US4041252A (en) * 1976-06-07 1977-08-09 North Electric Company Transformerless two-wire/four-wire hybrid with DC sourcing capability
US4142075A (en) * 1977-10-11 1979-02-27 Burr-Brown Research Corporation Interface circuit and method for telephone extension lines

Also Published As

Publication number Publication date
BE877247A (fr) 1979-12-27
FR2437757A2 (fr) 1980-04-25
JPS555595A (en) 1980-01-16
DE2925000C2 (de) 1984-03-22
GB2024564A (en) 1980-01-09
JPS6030468B2 (ja) 1985-07-16
FR2437757B2 ( ) 1984-01-06
DE2925000A1 (de) 1980-01-10
SE7905480L (sv) 1979-12-27
US4275277A (en) 1981-06-23
AU521488B2 (en) 1982-04-01
CA1137666A (en) 1982-12-14
CH648170A5 (de) 1985-02-28
AU4835879A (en) 1980-01-03
GB2024564B (en) 1982-06-09

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