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AU518635B2 - Subscriber circuit with symmetrical amplifier - Google Patents
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AU518635B2 - Subscriber circuit with symmetrical amplifier - Google Patents

Subscriber circuit with symmetrical amplifier

Info

Publication number
AU518635B2
AU518635B2 AU40755/78A AU4075578A AU518635B2 AU 518635 B2 AU518635 B2 AU 518635B2 AU 40755/78 A AU40755/78 A AU 40755/78A AU 4075578 A AU4075578 A AU 4075578A AU 518635 B2 AU518635 B2 AU 518635B2
Authority
AU
Australia
Prior art keywords
subscriber circuit
symmetrical amplifier
amplifier
symmetrical
subscriber
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.)
Expired
Application number
AU40755/78A
Other versions
AU4075578A (en
Inventor
G. M. M Terrien
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.)
T.R.T.
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
Publication of AU4075578A publication Critical patent/AU4075578A/en
Application granted granted Critical
Publication of AU518635B2 publication Critical patent/AU518635B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/023—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone by reversing the polarity of the current at the exchange
    • 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
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
AU40755/78A 1977-10-17 1978-10-16 Subscriber circuit with symmetrical amplifier Expired AU518635B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FRFR7731145 1977-10-17
FR7731145A FR2406357A1 (en) 1977-10-17 1977-10-17 Circuit connecting subscriber line to telephone exchange - has balanced amplifier whose input is connected to one or other of two supply points (BE 17.4.79)

Publications (2)

Publication Number Publication Date
AU4075578A AU4075578A (en) 1980-04-24
AU518635B2 true AU518635B2 (en) 1981-10-08

Family

ID=9196577

Family Applications (1)

Application Number Title Priority Date Filing Date
AU40755/78A Expired AU518635B2 (en) 1977-10-17 1978-10-16 Subscriber circuit with symmetrical amplifier

Country Status (3)

Country Link
AU (1) AU518635B2 (en)
BE (1) BE871299A (en)
FR (1) FR2406357A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7903663A (en) * 1979-05-10 1980-11-12 Philips Nv AMPLIFIER FOR APPLICATION IN A LINE CIRCUIT.
EP0029823B1 (en) * 1979-06-25 1984-03-14 Telecommunications Radioelectriques Et Telephoniques T.R.T. Current weighting circuit

Also Published As

Publication number Publication date
BE871299A (en) 1979-04-17
FR2406357A1 (en) 1979-05-11
AU4075578A (en) 1980-04-24
FR2406357B1 (en) 1980-04-04

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