AU554389B2 - Control and filter circuit - Google Patents

Control and filter circuit

Info

Publication number
AU554389B2
AU554389B2 AU88332/82A AU8833282A AU554389B2 AU 554389 B2 AU554389 B2 AU 554389B2 AU 88332/82 A AU88332/82 A AU 88332/82A AU 8833282 A AU8833282 A AU 8833282A AU 554389 B2 AU554389 B2 AU 554389B2
Authority
AU
Australia
Prior art keywords
control
filter circuit
filter
circuit
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.)
Ceased
Application number
AU88332/82A
Other versions
AU8833282A (en
Inventor
Johan Maurits Raphael Danneels
Auguste Jozef Louis Kumps
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.)
Alcatel Lucent NV
Original Assignee
International 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
Priority claimed from BE2/59364A external-priority patent/BE890401A/en
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of AU8833282A publication Critical patent/AU8833282A/en
Application granted granted Critical
Publication of AU554389B2 publication Critical patent/AU554389B2/en
Anticipated expiration legal-status Critical
Ceased 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
    • H04M19/005—Feeding arrangements without the use of line transformers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Networks Using Active Elements (AREA)
AU88332/82A 1981-09-18 1982-09-13 Control and filter circuit Ceased AU554389B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE2/59364A BE890401A (en) 1981-09-18 1981-09-18 HANDLEBAR AND FILTER CHAIN
BE259364 1981-09-18

Publications (2)

Publication Number Publication Date
AU8833282A AU8833282A (en) 1983-03-24
AU554389B2 true AU554389B2 (en) 1986-08-21

Family

ID=3865567

Family Applications (1)

Application Number Title Priority Date Filing Date
AU88332/82A Ceased AU554389B2 (en) 1981-09-18 1982-09-13 Control and filter circuit

Country Status (2)

Country Link
AU (1) AU554389B2 (en)
DE (1) DE3234329A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4027323A1 (en) * 1990-08-29 1992-03-05 Siemens Ag Call and feed voltage supply for PBX telephone appts. - feeds DC potential in rest and call states to subscriber line pair via different paths, under microprocessor control
US5661794A (en) * 1992-04-16 1997-08-26 Northern Telecom Limited Telephone line interface circuit with voltage control

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2828441C2 (en) * 1978-06-28 1980-07-03 Siemens Ag, 1000 Berlin Und 8000 Muenchen Method for coil, relay contact and transformer-free ringing current and loop current feed in telecommunications, especially PCM switching systems
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

Also Published As

Publication number Publication date
DE3234329C2 (en) 1989-02-09
DE3234329A1 (en) 1983-04-07
AU8833282A (en) 1983-03-24

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