CH512863A - Circuit arrangement for maintaining the symmetry of supply circuits for subscriber stations in telecommunications systems - Google Patents

Circuit arrangement for maintaining the symmetry of supply circuits for subscriber stations in telecommunications systems

Info

Publication number
CH512863A
CH512863A CH684770A CH684770A CH512863A CH 512863 A CH512863 A CH 512863A CH 684770 A CH684770 A CH 684770A CH 684770 A CH684770 A CH 684770A CH 512863 A CH512863 A CH 512863A
Authority
CH
Switzerland
Prior art keywords
symmetry
maintaining
circuit arrangement
supply circuits
subscriber stations
Prior art date
Application number
CH684770A
Other languages
German (de)
Inventor
Beszedics Geza
Loreck Heinz
Original Assignee
Int Standard Electric Corp
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 Int Standard Electric Corp filed Critical Int Standard Electric Corp
Publication of CH512863A publication Critical patent/CH512863A/en

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Measurement Of Current Or Voltage (AREA)
CH684770A 1969-05-09 1970-05-08 Circuit arrangement for maintaining the symmetry of supply circuits for subscriber stations in telecommunications systems CH512863A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT449669A AT291356B (en) 1969-05-09 1969-05-09 Circuit arrangement for the automatic maintenance of the symmetry of supply circuits for subscriber stations in telecommunication systems using transistors

Publications (1)

Publication Number Publication Date
CH512863A true CH512863A (en) 1971-09-15

Family

ID=3564787

Family Applications (1)

Application Number Title Priority Date Filing Date
CH684770A CH512863A (en) 1969-05-09 1970-05-08 Circuit arrangement for maintaining the symmetry of supply circuits for subscriber stations in telecommunications systems

Country Status (6)

Country Link
AT (1) AT291356B (en)
BE (1) BE750104A (en)
CH (1) CH512863A (en)
DE (1) DE2020527A1 (en)
FR (1) FR2047455A5 (en)
GB (1) GB1239537A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2372554A1 (en) * 1976-11-25 1978-06-23 Jeumont Schneider SUBSCRIBER LINE EQUIPMENT FOR TELEPHONE CENTRAL
DE2838038A1 (en) * 1978-08-31 1980-03-13 Siemens Ag Input circuit for telephone wire connection - has transistors, connected via collectors, to two wire and via transformer to four wire cable with supply to base and emitters
FR2442557A1 (en) * 1978-11-22 1980-06-20 Labo Cent Telecommunicat Automatic telephone line asymmetrical signal balancing - using synthetic centre tap on power supply and regulation of supply transistors
DE3032970C2 (en) * 1980-09-02 1987-04-16 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Circuit arrangement for symmetrizing the operating points of electronically DC-fed connecting lines in telecommunications systems, in particular telephone exchanges
JPS60157369A (en) * 1984-01-26 1985-08-17 Iwatsu Electric Co Ltd Speech current supply circuit

Also Published As

Publication number Publication date
BE750104A (en) 1970-11-09
FR2047455A5 (en) 1971-03-12
GB1239537A (en) 1971-07-14
AT291356B (en) 1971-07-12
DE2020527A1 (en) 1970-12-23

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Legal Events

Date Code Title Description
PL Patent ceased