AT291356B - Circuit arrangement for the automatic maintenance of the symmetry of supply circuits for subscriber stations in telecommunication systems using transistors - Google Patents

Circuit arrangement for the automatic maintenance of the symmetry of supply circuits for subscriber stations in telecommunication systems using transistors

Info

Publication number
AT291356B
AT291356B AT449669A AT449669A AT291356B AT 291356 B AT291356 B AT 291356B AT 449669 A AT449669 A AT 449669A AT 449669 A AT449669 A AT 449669A AT 291356 B AT291356 B AT 291356B
Authority
AT
Austria
Prior art keywords
transistors
symmetry
circuit arrangement
supply circuits
subscriber stations
Prior art date
Application number
AT449669A
Other languages
German (de)
Inventor
Geza Ing Beszedics
Heinz Loreck
Original Assignee
Itt Austria
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 Itt Austria filed Critical Itt Austria
Priority to AT449669A priority Critical patent/AT291356B/en
Priority to DE19702020527 priority patent/DE2020527A1/en
Priority to GB1239537D priority patent/GB1239537A/en
Priority to CH684770A priority patent/CH512863A/en
Priority to BE750104D priority patent/BE750104A/en
Priority to FR7016727A priority patent/FR2047455A5/fr
Application granted granted Critical
Publication of AT291356B publication Critical patent/AT291356B/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
AT449669A 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 AT291356B (en)

Priority Applications (6)

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
DE19702020527 DE2020527A1 (en) 1969-05-09 1970-04-27 Circuit arrangement for the automatic maintenance of the symmetry of supply circuits for subscriber stations in telecommunications systems using solid components
GB1239537D GB1239537A (en) 1969-05-09 1970-05-05
CH684770A CH512863A (en) 1969-05-09 1970-05-08 Circuit arrangement for maintaining the symmetry of supply circuits for subscriber stations in telecommunications systems
BE750104D BE750104A (en) 1969-05-09 1970-05-08 TELEPHONE STATION POWER SUPPLY
FR7016727A FR2047455A5 (en) 1969-05-09 1970-05-08

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
AT291356B true AT291356B (en) 1971-07-12

Family

ID=3564787

Family Applications (1)

Application Number Title Priority Date Filing Date
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

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
DE3032970A1 (en) * 1980-09-02 1982-04-15 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Balanced signal derived from telephone line - has operational amplifier between constant current generators with input connection to potential divider
JPS60157369A (en) * 1984-01-26 1985-08-17 Iwatsu Electric Co Ltd Speech current supply circuit

Also Published As

Publication number Publication date
DE2020527A1 (en) 1970-12-23
BE750104A (en) 1970-11-09
CH512863A (en) 1971-09-15
FR2047455A5 (en) 1971-03-12
GB1239537A (en) 1971-07-14

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Legal Events

Date Code Title Description
EFA Change in the company name
EFA Change in the company name
ELJ Ceased due to non-payment of the annual fee