DE3783348T2 - Leitungsspeiseschaltung mit aktiver impedanz. - Google Patents

Leitungsspeiseschaltung mit aktiver impedanz.

Info

Publication number
DE3783348T2
DE3783348T2 DE8787310286T DE3783348T DE3783348T2 DE 3783348 T2 DE3783348 T2 DE 3783348T2 DE 8787310286 T DE8787310286 T DE 8787310286T DE 3783348 T DE3783348 T DE 3783348T DE 3783348 T2 DE3783348 T2 DE 3783348T2
Authority
DE
Germany
Prior art keywords
tip
ring
amplifier
voltage taps
active impedance
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 - Fee Related
Application number
DE8787310286T
Other languages
English (en)
Other versions
DE3783348D1 (de
Inventor
Reinhard Rosch
Stanley Daniel Rosebaum
Calvin Plett
Zdenek Holy
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
Application granted granted Critical
Publication of DE3783348D1 publication Critical patent/DE3783348D1/de
Publication of DE3783348T2 publication Critical patent/DE3783348T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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)
  • Networks Using Active Elements (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Amplifiers (AREA)
  • Devices For Supply Of Signal Current (AREA)
DE8787310286T 1986-12-24 1987-11-20 Leitungsspeiseschaltung mit aktiver impedanz. Expired - Fee Related DE3783348T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA000526332A CA1258930A (en) 1986-12-24 1986-12-24 Active impedance line feed circuit

Publications (2)

Publication Number Publication Date
DE3783348D1 DE3783348D1 (de) 1993-02-11
DE3783348T2 true DE3783348T2 (de) 1993-04-22

Family

ID=4134644

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8787310286T Expired - Fee Related DE3783348T2 (de) 1986-12-24 1987-11-20 Leitungsspeiseschaltung mit aktiver impedanz.

Country Status (7)

Country Link
US (1) US4764956A (de)
EP (1) EP0272800B1 (de)
JP (1) JPS63169865A (de)
CN (1) CN1009897B (de)
AT (1) ATE84178T1 (de)
CA (1) CA1258930A (de)
DE (1) DE3783348T2 (de)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0671295B2 (ja) * 1987-04-06 1994-09-07 沖電気工業株式会社 加入者線給電回路
US4941063A (en) * 1988-03-04 1990-07-10 Oneac Corporation Telephone lines overvoltage protection apparatus
US5052039A (en) * 1990-01-16 1991-09-24 Northern Telecom Limited Line interface circuit
DE69024947T2 (de) * 1990-05-11 1996-08-08 Alcatel Nv Impedanz-Synthese durch vielfache Schleife, die filternde Mittel verwendet
US5586181A (en) * 1990-09-04 1996-12-17 Tollgrade Communications, Inc. Metallic channel unit network
US5202919A (en) * 1990-09-04 1993-04-13 Tollgrade Communications, Inc. Metallic channel unit network
US5457743A (en) * 1990-09-04 1995-10-10 Tollgrade Communications, Inc. Metallic channel unit network
US5103387A (en) * 1991-01-31 1992-04-07 Northern Telecom Limited High voltage converter
US5661794A (en) * 1992-04-16 1997-08-26 Northern Telecom Limited Telephone line interface circuit with voltage control
JP3322889B2 (ja) * 1991-03-19 2002-09-09 株式会社東芝 給電伝送システム
US5359655A (en) * 1991-06-06 1994-10-25 U.S. Philips Corporation Supply circuit for a telecommunication line, providing highly symmetrical and rapid response to line voltage disturbances
US5258713A (en) * 1992-04-16 1993-11-02 Northern Telecom Limited Impedance generator for a telephone line interface circuit
US5274702A (en) * 1992-04-16 1993-12-28 Northern Telecom Limited Wideband telephone line interface circuit
US5329585A (en) * 1992-11-30 1994-07-12 Motorola, Inc. Subscriber line interface circuit for controlling AC and DC output impedance
EP0620649B1 (de) * 1993-03-18 1997-09-10 NCR International, Inc. Übertragungsempfängerschaltkreis für eine integrierte Schaltung
SE501975C2 (sv) * 1993-11-09 1995-07-03 Ericsson Telefon Ab L M Gränssnittskrets mellan fyrtrådsledning och tvåtrådsledning
US5528688A (en) * 1994-09-28 1996-06-18 At&T Corp. Telephone battery feed circuit including noise reduction circuit
CA2289397A1 (en) 1999-11-12 2001-05-12 Jonathan Kwan A low insertion loss current sense circuit for line cards
US6489755B1 (en) * 2000-09-18 2002-12-03 Adtran, Inc. Active ripple and noise filter for telecommunication equipment powering
US6678132B1 (en) * 2002-09-06 2004-01-13 Bae Systems Controls, Inc. Ground fault detection system
US7249676B2 (en) * 2003-08-07 2007-07-31 Tg Tools United Company Packaging, storage and display apparatus and system
US8319466B2 (en) * 2011-02-21 2012-11-27 Rockwell Automation Technologies, Inc. Modular line-to-ground fault identification
US8710825B2 (en) * 2011-02-23 2014-04-29 General Electric Company Method and system of a sensor interface having dynamic automatic gain control
US9860392B2 (en) 2015-06-05 2018-01-02 Silicon Laboratories Inc. Direct-current to alternating-current power conversion

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4476350A (en) * 1981-02-17 1984-10-09 Bell Telephone Laboratories, Incorporated Battery feed circuit
CA1182230A (en) * 1982-12-17 1985-02-05 Patrick R. Beirne Subscriber line interface circuit
US4571460A (en) * 1984-03-12 1986-02-18 Northern Telecom Limited Active impedance line feed circuit with improved ground fault protection
US4612417A (en) * 1984-07-27 1986-09-16 At&T Bell Laboratories Electronic battery feed circuit for telephone systems

Also Published As

Publication number Publication date
ATE84178T1 (de) 1993-01-15
EP0272800B1 (de) 1992-12-30
US4764956A (en) 1988-08-16
JPS63169865A (ja) 1988-07-13
CN87101278A (zh) 1988-07-06
DE3783348D1 (de) 1993-02-11
CA1258930A (en) 1989-08-29
EP0272800A2 (de) 1988-06-29
EP0272800A3 (en) 1990-03-28
CN1009897B (zh) 1990-10-03

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee