SE446579B - Kopplingskrets for en telefonledning - Google Patents

Kopplingskrets for en telefonledning

Info

Publication number
SE446579B
SE446579B SE8003400A SE8003400A SE446579B SE 446579 B SE446579 B SE 446579B SE 8003400 A SE8003400 A SE 8003400A SE 8003400 A SE8003400 A SE 8003400A SE 446579 B SE446579 B SE 446579B
Authority
SE
Sweden
Prior art keywords
output
current
amplifier
telephone line
switching circuit
Prior art date
Application number
SE8003400A
Other languages
English (en)
Swedish (sv)
Inventor
A J Nijman
F A C M Schoofs
Original Assignee
Philips Nv
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 Philips Nv filed Critical Philips Nv
Publication of SE446579B publication Critical patent/SE446579B/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
    • 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
    • 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)
  • Devices For Supply Of Signal Current (AREA)
SE8003400A 1979-05-10 1980-05-07 Kopplingskrets for en telefonledning SE446579B (sv)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7903665A NL7903665A (nl) 1979-05-10 1979-05-10 Aansluitschakeling voor een telefoonlijn.

Publications (1)

Publication Number Publication Date
SE446579B true SE446579B (sv) 1986-09-22

Family

ID=19833140

Family Applications (2)

Application Number Title Priority Date Filing Date
SE8003400A SE446579B (sv) 1979-05-10 1980-05-07 Kopplingskrets for en telefonledning
SE8003400D SE8003400L (sv) 1979-05-10 1980-05-07 Kopplingskrets for en telefonledning

Family Applications After (1)

Application Number Title Priority Date Filing Date
SE8003400D SE8003400L (sv) 1979-05-10 1980-05-07 Kopplingskrets for en telefonledning

Country Status (11)

Country Link
US (1) US4313034A (cs)
JP (1) JPS55150660A (cs)
AU (1) AU532852B2 (cs)
BE (1) BE883196A (cs)
CA (1) CA1143493A (cs)
DE (1) DE3017646C2 (cs)
FR (1) FR2456432B1 (cs)
GB (1) GB2050114B (cs)
IT (1) IT1131454B (cs)
NL (1) NL7903665A (cs)
SE (2) SE446579B (cs)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5526425A (en) * 1993-11-09 1996-06-11 Telefonaktiebolaget Lm Ericsson Interface circuit between a four wire line and a two wire line

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE452385B (sv) * 1981-02-17 1987-11-23 Western Electric Co Batterimatningskrets
FR2527404B1 (fr) * 1982-05-19 1987-10-23 Cit Alcatel Joncteur d'abonne electronique
US4524246A (en) * 1982-07-07 1985-06-18 Harris Corporation SLIC II--common-mode current rejection
SE433285B (sv) * 1982-09-22 1984-05-14 Ericsson Telefon Ab L M Anordning for strommatning av en abonnentapparat
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.
IT1252125B (it) * 1991-10-23 1995-06-05 Sgs Thomson Microelectronics Metodo e dispositivo circuitale per misurare in condizioni di esercizio parametri operativi di un circuito di interfaccia e di una linea telefonica d'utente ad esse collegata

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4004109A (en) * 1975-05-09 1977-01-18 Boxall Frank S Hybrid circuit
FR2366756A1 (fr) * 1976-09-30 1978-04-28 Labo Cent Telecommunicat Circuit electronique d'injection de sonnerie
NL7700719A (nl) * 1977-01-25 1978-07-27 Philips Nv Storingsongevoelig lijnsupervisiecircuit.
US4087646A (en) * 1977-01-28 1978-05-02 Bell Telephone Laboratories, Incorporated Dual mode telephone subscriber loop current detector
US4099032A (en) * 1977-03-25 1978-07-04 Wescom, Inc. Loop current detector
US4203012A (en) * 1977-07-14 1980-05-13 Boxall Frank S Hybrid circuit using current mirror circuits
ZA784547B (en) * 1977-08-17 1979-08-29 Post Office Unbalanced/balanced converter circuits
US4192974A (en) * 1978-03-20 1980-03-11 Lorain Products Corporation Multi-section apparatus for improving signal transmission through telephone transmission lines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5526425A (en) * 1993-11-09 1996-06-11 Telefonaktiebolaget Lm Ericsson Interface circuit between a four wire line and a two wire line

Also Published As

Publication number Publication date
GB2050114B (en) 1983-03-16
JPH0232829B2 (cs) 1990-07-24
FR2456432B1 (fr) 1986-05-09
AU5812080A (en) 1980-11-13
IT8021869A0 (it) 1980-05-07
DE3017646A1 (de) 1980-11-13
GB2050114A (en) 1980-12-31
FR2456432A1 (fr) 1980-12-05
IT1131454B (it) 1986-06-25
AU532852B2 (en) 1983-10-13
BE883196A (fr) 1980-11-10
CA1143493A (en) 1983-03-22
SE8003400L (sv) 1980-11-11
NL7903665A (nl) 1980-11-12
DE3017646C2 (de) 1984-04-26
JPS55150660A (en) 1980-11-22
US4313034A (en) 1982-01-26

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Legal Events

Date Code Title Description
NUG Patent has lapsed

Ref document number: 8003400-2

Effective date: 19931210