AU2568484A - Terminal set circuit - Google Patents

Terminal set circuit

Info

Publication number
AU2568484A
AU2568484A AU25684/84A AU2568484A AU2568484A AU 2568484 A AU2568484 A AU 2568484A AU 25684/84 A AU25684/84 A AU 25684/84A AU 2568484 A AU2568484 A AU 2568484A AU 2568484 A AU2568484 A AU 2568484A
Authority
AU
Australia
Prior art keywords
microphone
receiver
resistor
terminal set
junction point
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
AU25684/84A
Other versions
AU547258B2 (en
Inventor
Hermann Ritz
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of AU2568484A publication Critical patent/AU2568484A/en
Application granted granted Critical
Publication of AU547258B2 publication Critical patent/AU547258B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/58—Anti-side-tone circuits
    • H04M1/585—Anti-side-tone circuits implemented without inductive element

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Amplifiers (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

1. A hybrid circuit for a subscriber station, centrally fed via the a/b-wire of a telecommunications system, in particular a telephone system, comprising a microphone, a receiver and a balancing dummy line, characterized in that a first resistor (R1 ) and a capacitive receiver (F) are connected in series between the a/b-wires, that a microphone (M) and a transistor choke (TD) are connected in parallel therewith, the junction point between the first resistor (R1 ) and the receiver (F) and the junction point between the microphone (M) and the transistor choke being connected to one another by a further resistor (R2 ) and that a balancing dummy line network is connected parallel to the transistor choke.
AU25684/84A 1983-03-18 1984-03-16 Terminal set circuit Ceased AU547258B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3309822 1983-03-18
DE3309822A DE3309822C2 (en) 1983-03-18 1983-03-18 Hybrid circuit for a centrally fed subscriber station

Publications (2)

Publication Number Publication Date
AU2568484A true AU2568484A (en) 1984-09-20
AU547258B2 AU547258B2 (en) 1985-10-10

Family

ID=6193919

Family Applications (1)

Application Number Title Priority Date Filing Date
AU25684/84A Ceased AU547258B2 (en) 1983-03-18 1984-03-16 Terminal set circuit

Country Status (4)

Country Link
EP (1) EP0119601B1 (en)
AT (1) ATE27880T1 (en)
AU (1) AU547258B2 (en)
DE (2) DE3309822C2 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1762058B2 (en) * 1968-03-29 1970-12-03 Siemens AG, 1000 Berlin u. 8000 München Circuit arrangement for centrally fed subscriber stations with speech circuits containing a resistor bridge
BE789514A (en) * 1971-09-30 1973-03-29 Siemens Ag INTEGRABLE MONOLITHIC CIRCUIT FOR TELEPHONE CONNECTION OF SUBSCRIBER STATIONS TO CENTRAL POWER SUPPLY
US3955053A (en) * 1971-09-30 1976-05-04 Siemens Aktiengesellschaft Integrated circuit arrangement for a telephone subscriber station
IT1024529B (en) * 1974-03-21 1978-07-20 Sits Soc It Telecom Siemens SYMMETRIC TELEPHONE FORK
DE2811065C3 (en) * 1978-03-14 1983-06-16 Willi Studer, Fabrik für elektronische Apparate, Regensdorf Telephone hybrid circuit

Also Published As

Publication number Publication date
EP0119601A1 (en) 1984-09-26
EP0119601B1 (en) 1987-06-16
DE3309822C2 (en) 1985-11-14
DE3464309D1 (en) 1987-07-23
DE3309822A1 (en) 1984-09-27
ATE27880T1 (en) 1987-07-15
AU547258B2 (en) 1985-10-10

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