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

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
US4431874A (en) * 1981-09-24 1984-02-14 Motorola, Inc. Balanced current multiplier circuit for a subscriber loop interface circuit
CA1177985A (en) * 1981-09-24 1984-11-13 Don W. Zobel Electronic terminator 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 (ja) * 1968-04-19 1969-12-05
NL7208148A (ja) * 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
FR2437757A2 (fr) 1980-04-25
JPS6030468B2 (ja) 1985-07-16
DE2925000C2 (de) 1984-03-22
GB2024564B (en) 1982-06-09
AU521488B2 (en) 1982-04-01
FR2437757B2 (ja) 1984-01-06
BE877247A (fr) 1979-12-27
US4275277A (en) 1981-06-23
CA1137666A (en) 1982-12-14
DE2925000A1 (de) 1980-01-10
CH648170A5 (de) 1985-02-28
SE7905480L (sv) 1979-12-27
AU4835879A (en) 1980-01-03
GB2024564A (en) 1980-01-09
JPS555595A (en) 1980-01-16

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