FR2254168A1 - Telephone line supply device - is an active electronic device acting as resistance for direct current and high impedance for A.C. - Google Patents

Telephone line supply device - is an active electronic device acting as resistance for direct current and high impedance for A.C.

Info

Publication number
FR2254168A1
FR2254168A1 FR7344124A FR7344124A FR2254168A1 FR 2254168 A1 FR2254168 A1 FR 2254168A1 FR 7344124 A FR7344124 A FR 7344124A FR 7344124 A FR7344124 A FR 7344124A FR 2254168 A1 FR2254168 A1 FR 2254168A1
Authority
FR
France
Prior art keywords
resistance
high impedance
telephone line
active electronic
supply device
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
FR7344124A
Other languages
French (fr)
Other versions
FR2254168B1 (en
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.)
Association des Ouvriers en Instruments de Precision
Original Assignee
Association des Ouvriers en Instruments de Precision
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 Association des Ouvriers en Instruments de Precision filed Critical Association des Ouvriers en Instruments de Precision
Priority to FR7344124A priority Critical patent/FR2254168A1/en
Publication of FR2254168A1 publication Critical patent/FR2254168A1/en
Application granted granted Critical
Publication of FR2254168B1 publication Critical patent/FR2254168B1/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
    • 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)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

Supply device, from a continuous voltage source, for a telephone line connected to telephone switching circuits by a transformer (T). Has between each pole of the supply source and the connection of the line associated with this pole, an active electronic circuit (A, B) acting as a resistance for continuous current and presenting a high impedance to alternating currents in the line. Both the electronic circuits in the lines being identical. Each electronic circuit has two terminals one connected to a pole of the supply source and the other to the corresponding line. Transistors are connected as a Darlington pair, and a resistance bridge interconnects terminals and has intermediate points connected to the electrodes of the transistors and a capacitor connected between one of the terminals and the base of the second transistor.
FR7344124A 1973-12-11 1973-12-11 Telephone line supply device - is an active electronic device acting as resistance for direct current and high impedance for A.C. Granted FR2254168A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7344124A FR2254168A1 (en) 1973-12-11 1973-12-11 Telephone line supply device - is an active electronic device acting as resistance for direct current and high impedance for A.C.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7344124A FR2254168A1 (en) 1973-12-11 1973-12-11 Telephone line supply device - is an active electronic device acting as resistance for direct current and high impedance for A.C.

Publications (2)

Publication Number Publication Date
FR2254168A1 true FR2254168A1 (en) 1975-07-04
FR2254168B1 FR2254168B1 (en) 1978-12-08

Family

ID=9129021

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7344124A Granted FR2254168A1 (en) 1973-12-11 1973-12-11 Telephone line supply device - is an active electronic device acting as resistance for direct current and high impedance for A.C.

Country Status (1)

Country Link
FR (1) FR2254168A1 (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4046969A (en) * 1976-08-05 1977-09-06 Bell Telephone Laboratories, Incorporated Dial pulse repeating line circuit using miniature line transformer
US4046967A (en) * 1976-08-05 1977-09-06 Bell Telephone Laboratories, Incorporated Line circuit using miniature line transformer
US4087647A (en) * 1977-05-25 1978-05-02 Bell Telephone Laboratories, Incorporated Circuit for supplying direct current to telephone station sets
US4135062A (en) * 1976-12-10 1979-01-16 U.S. Philips Corporation Electric network for use in a subscriber's loop
US4167654A (en) * 1977-03-02 1979-09-11 International Standard Electric Corporation Telephone line feeding circuit including a protective device
FR2427751A1 (en) * 1978-06-02 1979-12-28 Cselt Centro Studi Lab Telecom ELECTRONIC TELEPHONE CIRCUIT FOR SUBSCRIBER LINE
US4203009A (en) * 1977-08-17 1980-05-13 The Post Office Unbalanced/balanced converter circuits
US4241239A (en) * 1978-02-24 1980-12-23 International Telephone And Telegraph Corporation Fluxbucking line transformer with electronic equivalent line terminating impedance
US4267408A (en) * 1978-07-13 1981-05-12 U.S. Philips Corporation Arrangement for applying a signal to a transmission line
FR2546351A1 (en) * 1983-05-18 1984-11-23 Telecommunications Sa LINE CIRCUIT FOR NETWORK JUMPER
US4608461A (en) * 1982-11-12 1986-08-26 U.S. Philips Corporation Subscriber circuit for a telephone network
WO1988002527A1 (en) * 1986-09-29 1988-04-07 Shepherd Intelligence Systems, Inc. Aircraft security system
US5063371A (en) * 1986-09-29 1991-11-05 Oyer Michael W Aircraft security system
BE1007208A3 (en) * 1993-06-07 1995-04-25 Philips Electronics Nv Telecommunications system equipped with a supply switch for a telecommunication line and a supply switch for a telecommunication line suitable for application in the telecommunication system
WO1998010582A1 (en) * 1996-09-03 1998-03-12 Philips Electronics N.V. Electronic impedance supply circuit

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4046969A (en) * 1976-08-05 1977-09-06 Bell Telephone Laboratories, Incorporated Dial pulse repeating line circuit using miniature line transformer
US4046967A (en) * 1976-08-05 1977-09-06 Bell Telephone Laboratories, Incorporated Line circuit using miniature line transformer
US4135062A (en) * 1976-12-10 1979-01-16 U.S. Philips Corporation Electric network for use in a subscriber's loop
US4167654A (en) * 1977-03-02 1979-09-11 International Standard Electric Corporation Telephone line feeding circuit including a protective device
US4087647A (en) * 1977-05-25 1978-05-02 Bell Telephone Laboratories, Incorporated Circuit for supplying direct current to telephone station sets
US4203009A (en) * 1977-08-17 1980-05-13 The Post Office Unbalanced/balanced converter circuits
US4241239A (en) * 1978-02-24 1980-12-23 International Telephone And Telegraph Corporation Fluxbucking line transformer with electronic equivalent line terminating impedance
FR2427751A1 (en) * 1978-06-02 1979-12-28 Cselt Centro Studi Lab Telecom ELECTRONIC TELEPHONE CIRCUIT FOR SUBSCRIBER LINE
US4267408A (en) * 1978-07-13 1981-05-12 U.S. Philips Corporation Arrangement for applying a signal to a transmission line
US4608461A (en) * 1982-11-12 1986-08-26 U.S. Philips Corporation Subscriber circuit for a telephone network
FR2546351A1 (en) * 1983-05-18 1984-11-23 Telecommunications Sa LINE CIRCUIT FOR NETWORK JUMPER
EP0127517A1 (en) * 1983-05-18 1984-12-05 Societe Anonyme De Telecommunications (S.A.T.) Junction circuit for an exchange trunk
WO1988002527A1 (en) * 1986-09-29 1988-04-07 Shepherd Intelligence Systems, Inc. Aircraft security system
US4933668A (en) * 1986-09-29 1990-06-12 Shepherd Intelligence Systems, Inc. Aircraft security system
US5063371A (en) * 1986-09-29 1991-11-05 Oyer Michael W Aircraft security system
BE1007208A3 (en) * 1993-06-07 1995-04-25 Philips Electronics Nv Telecommunications system equipped with a supply switch for a telecommunication line and a supply switch for a telecommunication line suitable for application in the telecommunication system
WO1998010582A1 (en) * 1996-09-03 1998-03-12 Philips Electronics N.V. Electronic impedance supply circuit
US6134323A (en) * 1996-09-03 2000-10-17 U.S. Philips Corporation Telecommunications system, an automatic branch exchange, a line card, a supply circuit for a telecommunications line, and a telecommunications subscriber device

Also Published As

Publication number Publication date
FR2254168B1 (en) 1978-12-08

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Legal Events

Date Code Title Description
ST Notification of lapse