CA1179078A - Active impedance line feed circuit - Google Patents

Active impedance line feed circuit

Info

Publication number
CA1179078A
CA1179078A CA000404502A CA404502A CA1179078A CA 1179078 A CA1179078 A CA 1179078A CA 000404502 A CA000404502 A CA 000404502A CA 404502 A CA404502 A CA 404502A CA 1179078 A CA1179078 A CA 1179078A
Authority
CA
Canada
Prior art keywords
voltage
tip
ring
line
feed
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
CA000404502A
Other languages
English (en)
French (fr)
Inventor
Stanley D. Rosenbaum
Martin R. Handforth
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.)
Nortel Networks Ltd
Original Assignee
Northern Telecom Ltd
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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Priority to CA000404502A priority Critical patent/CA1179078A/en
Priority to DE8383302686T priority patent/DE3365424D1/de
Priority to AT83302686T priority patent/ATE21603T1/de
Priority to EP83302686A priority patent/EP0096473B1/en
Priority to JP58098156A priority patent/JPS58222626A/ja
Application granted granted Critical
Publication of CA1179078A publication Critical patent/CA1179078A/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
    • H04M19/001—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)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Networks Using Active Elements (AREA)
CA000404502A 1982-06-04 1982-06-04 Active impedance line feed circuit Expired CA1179078A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CA000404502A CA1179078A (en) 1982-06-04 1982-06-04 Active impedance line feed circuit
DE8383302686T DE3365424D1 (en) 1982-06-04 1983-05-11 Active impedance line feed circuit
AT83302686T ATE21603T1 (de) 1982-06-04 1983-05-11 Leitungsspeiseschaltung aktiver impedanz.
EP83302686A EP0096473B1 (en) 1982-06-04 1983-05-11 Active impedance line feed circuit
JP58098156A JPS58222626A (ja) 1982-06-04 1983-06-03 有効インピ−ダンス回線給電回路

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA000404502A CA1179078A (en) 1982-06-04 1982-06-04 Active impedance line feed circuit

Publications (1)

Publication Number Publication Date
CA1179078A true CA1179078A (en) 1984-12-04

Family

ID=4122932

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000404502A Expired CA1179078A (en) 1982-06-04 1982-06-04 Active impedance line feed circuit

Country Status (5)

Country Link
EP (1) EP0096473B1 (en, 2012)
JP (1) JPS58222626A (en, 2012)
AT (1) ATE21603T1 (en, 2012)
CA (1) CA1179078A (en, 2012)
DE (1) DE3365424D1 (en, 2012)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4709296A (en) * 1985-06-18 1987-11-24 Northern Telecom Limited Protection arrangement for a telephone subscriber line interface circuit

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1178386A (en) * 1982-06-07 1984-11-20 Stanley D. Rosenbaum Active impedance transformer assisted line feed circuit
DE3367059D1 (en) * 1983-06-30 1986-11-20 Ibm D.c. powering circuit for a line interface circuit
CA1200335A (en) * 1984-02-13 1986-02-04 Stanley D. Rosenbaum Active impedance line feed circuit
CA1231480A (en) * 1985-03-15 1988-01-12 John A. Barsellotti Constant current line circuit
CA1255026A (en) * 1986-12-24 1989-05-30 Mitel Corporation Dc control circuit
CA1268873A (en) * 1987-09-22 1990-05-08 Mihail Stefan Augustin Traian Moisin Line interface circuit

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2462070A1 (fr) * 1979-07-17 1981-02-06 Cit Alcatel Dispositif d'alimentation d'un poste d'abonne
US4387273A (en) * 1980-08-25 1983-06-07 International Telephone And Telegraph Corporation Subscriber line interface circuit with impedance synthesizer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4709296A (en) * 1985-06-18 1987-11-24 Northern Telecom Limited Protection arrangement for a telephone subscriber line interface circuit

Also Published As

Publication number Publication date
EP0096473B1 (en) 1986-08-20
JPH0262970B2 (en, 2012) 1990-12-27
DE3365424D1 (en) 1986-09-25
ATE21603T1 (de) 1986-09-15
JPS58222626A (ja) 1983-12-24
EP0096473A1 (en) 1983-12-21

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Legal Events

Date Code Title Description
MKEC Expiry (correction)
MKEX Expiry