IT8021869A0 - Circuito di collegamento per una linea telefonica. - Google Patents

Circuito di collegamento per una linea telefonica.

Info

Publication number
IT8021869A0
IT8021869A0 IT8021869A IT2186980A IT8021869A0 IT 8021869 A0 IT8021869 A0 IT 8021869A0 IT 8021869 A IT8021869 A IT 8021869A IT 2186980 A IT2186980 A IT 2186980A IT 8021869 A0 IT8021869 A0 IT 8021869A0
Authority
IT
Italy
Prior art keywords
telephone line
connection circuit
circuit
connection
telephone
Prior art date
Application number
IT8021869A
Other languages
English (en)
Other versions
IT1131454B (it
Inventor
Nijman Aloysius Jozef
Schoofs Franciscus Adria Maria
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 IT8021869A0 publication Critical patent/IT8021869A0/it
Application granted granted Critical
Publication of IT1131454B publication Critical patent/IT1131454B/it

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)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
IT21869/80A 1979-05-10 1980-05-07 Circuito di collegamento per una linea telefonica IT1131454B (it)

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 (2)

Publication Number Publication Date
IT8021869A0 true IT8021869A0 (it) 1980-05-07
IT1131454B IT1131454B (it) 1986-06-25

Family

ID=19833140

Family Applications (1)

Application Number Title Priority Date Filing Date
IT21869/80A IT1131454B (it) 1979-05-10 1980-05-07 Circuito di collegamento per una linea telefonica

Country Status (11)

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

Families Citing this family (7)

* 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
SE501975C2 (sv) * 1993-11-09 1995-07-03 Ericsson Telefon Ab L M Gränssnittskrets mellan fyrtrådsledning och tvåtrådsledning

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
US4203009A (en) * 1977-08-17 1980-05-13 The 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

Also Published As

Publication number Publication date
FR2456432B1 (fr) 1986-05-09
JPS55150660A (en) 1980-11-22
SE446579B (sv) 1986-09-22
GB2050114A (en) 1980-12-31
NL7903665A (nl) 1980-11-12
AU5812080A (en) 1980-11-13
SE8003400L (sv) 1980-11-11
FR2456432A1 (fr) 1980-12-05
DE3017646C2 (de) 1984-04-26
AU532852B2 (en) 1983-10-13
US4313034A (en) 1982-01-26
DE3017646A1 (de) 1980-11-13
IT1131454B (it) 1986-06-25
CA1143493A (en) 1983-03-22
BE883196A (fr) 1980-11-10
GB2050114B (en) 1983-03-16
JPH0232829B2 (it) 1990-07-24

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