FR2430153A1 - Telephone line and exchange connecting connecting circuit - forms current which is equal to weighted sum of current in wires with equal weighting coefficients - Google Patents

Telephone line and exchange connecting connecting circuit - forms current which is equal to weighted sum of current in wires with equal weighting coefficients

Info

Publication number
FR2430153A1
FR2430153A1 FR7818960A FR7818960A FR2430153A1 FR 2430153 A1 FR2430153 A1 FR 2430153A1 FR 7818960 A FR7818960 A FR 7818960A FR 7818960 A FR7818960 A FR 7818960A FR 2430153 A1 FR2430153 A1 FR 2430153A1
Authority
FR
France
Prior art keywords
equal
current
telephone line
wires
weighted sum
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
FR7818960A
Other languages
French (fr)
Other versions
FR2430153B1 (en
Inventor
Gilbert Ferrieu
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.)
Telecommunications Radioelectriques et Telephoniques SA TRT
Original Assignee
Telecommunications Radioelectriques et Telephoniques SA TRT
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 Telecommunications Radioelectriques et Telephoniques SA TRT filed Critical Telecommunications Radioelectriques et Telephoniques SA TRT
Priority to FR7818960A priority Critical patent/FR2430153A1/en
Priority to FR7827762A priority patent/FR2437757A2/en
Priority to SE7905480A priority patent/SE437320B/en
Priority to CA000330330A priority patent/CA1137666A/en
Priority to DE2925000A priority patent/DE2925000C2/en
Priority to US06/051,084 priority patent/US4275277A/en
Priority to GB7921834A priority patent/GB2024564B/en
Priority to CH5877/79A priority patent/CH648170A5/en
Priority to JP54080070A priority patent/JPS6030468B2/en
Priority to AU48358/79A priority patent/AU521488B2/en
Priority to BE0/195949A priority patent/BE877247A/en
Publication of FR2430153A1 publication Critical patent/FR2430153A1/en
Application granted granted Critical
Publication of FR2430153B1 publication Critical patent/FR2430153B1/fr
Granted legal-status Critical Current

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)

Abstract

The circuit is for connecting a telephone line to a telephone exchange. The connecting circuit is made up of a push-pull amplifiers, which consists of two identical amplifiers, which is fed by a d.c. supply source, and the output of which are connected to the wires of the telephone line. It comprises a device for forming a sum current which is equal to the weighted sum of the current flowing to one of the wires of the telephone line and the current flowing from the other wire with equal weighing coefficients. A device forms two equal voltages of opposite polarities and proportional to the sum current. A device supplies these two voltages, via a feedback arrangement, to the two inputs of the push-pull amplifier.
FR7818960A 1978-06-26 1978-06-26 Telephone line and exchange connecting connecting circuit - forms current which is equal to weighted sum of current in wires with equal weighting coefficients Granted FR2430153A1 (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
FR7818960A FR2430153A1 (en) 1978-06-26 1978-06-26 Telephone line and exchange connecting connecting circuit - forms current which is equal to weighted sum of current in wires with equal weighting coefficients
FR7827762A FR2437757A2 (en) 1978-06-26 1978-09-28 SUBSCRIBER TRUNK FOR ENSURING TWO-WIRE OR FOUR-WIRE COUPLING WITH A TELEPHONE CENTRAL
CA000330330A CA1137666A (en) 1978-06-26 1979-06-21 Connecting circuit for a telephone line
DE2925000A DE2925000C2 (en) 1978-06-26 1979-06-21 Subscriber circuit
SE7905480A SE437320B (en) 1978-06-26 1979-06-21 SUBSCRIPTION CONNECTION FOR CONNECTING A TELEPHONE LINE TO A TELEPHONE SWITCH
GB7921834A GB2024564B (en) 1978-06-26 1979-06-22 Connecting circuit for a telephone line
US06/051,084 US4275277A (en) 1978-06-26 1979-06-22 Subscriber line interface circuit for a telephone line
CH5877/79A CH648170A5 (en) 1978-06-26 1979-06-22 TELEPHONE LINE CIRCUIT.
JP54080070A JPS6030468B2 (en) 1978-06-26 1979-06-25 subscriber circuit
AU48358/79A AU521488B2 (en) 1978-06-26 1979-06-25 Connecting circuit for telephone line
BE0/195949A BE877247A (en) 1978-06-26 1979-06-25 AANSLUITSCHAKELING VOOR EEN TELEFOONLIJN

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7818960A FR2430153A1 (en) 1978-06-26 1978-06-26 Telephone line and exchange connecting connecting circuit - forms current which is equal to weighted sum of current in wires with equal weighting coefficients

Publications (2)

Publication Number Publication Date
FR2430153A1 true FR2430153A1 (en) 1980-01-25
FR2430153B1 FR2430153B1 (en) 1982-03-05

Family

ID=9209964

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7818960A Granted FR2430153A1 (en) 1978-06-26 1978-06-26 Telephone line and exchange connecting connecting circuit - forms current which is equal to weighted sum of current in wires with equal weighting coefficients

Country Status (1)

Country Link
FR (1) FR2430153A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2556157A1 (en) * 1975-12-11 1977-06-16 Deutsche Telephonwerk Kabel Subscriber electronic supply circuit - is for telephone PBX with loop current monitoring and ringing signal connection
DE2649351A1 (en) * 1975-05-09 1978-05-03 Frank Stuart Boxall DIRECTLY COUPLED, TRANSFORMERLESS FORK GEAR

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2649351A1 (en) * 1975-05-09 1978-05-03 Frank Stuart Boxall DIRECTLY COUPLED, TRANSFORMERLESS FORK GEAR
DE2556157A1 (en) * 1975-12-11 1977-06-16 Deutsche Telephonwerk Kabel Subscriber electronic supply circuit - is for telephone PBX with loop current monitoring and ringing signal connection

Also Published As

Publication number Publication date
FR2430153B1 (en) 1982-03-05

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Legal Events

Date Code Title Description
TP Transmission of property
TP Transmission of property
TP Transmission of property
ST Notification of lapse
ST Notification of lapse