CA1208385A - Battery feed circuit for telephone subscriber line - Google Patents

Battery feed circuit for telephone subscriber line

Info

Publication number
CA1208385A
CA1208385A CA000444408A CA444408A CA1208385A CA 1208385 A CA1208385 A CA 1208385A CA 000444408 A CA000444408 A CA 000444408A CA 444408 A CA444408 A CA 444408A CA 1208385 A CA1208385 A CA 1208385A
Authority
CA
Canada
Prior art keywords
voltage
output
feed circuit
battery feed
amplifier
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
CA000444408A
Other languages
English (en)
French (fr)
Inventor
Kiyoshi Shibuya
Mitsutoshi Ayano
Shin-Ichi Itou
Kenji Takatou
Toshiro Tojo
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Application granted granted Critical
Publication of CA1208385A publication Critical patent/CA1208385A/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
    • H04M19/008—Using DC/DC converters
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
CA000444408A 1982-12-30 1983-12-29 Battery feed circuit for telephone subscriber line Expired CA1208385A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP57-233825 1982-12-30
JP57233825A JPS59125157A (ja) 1982-12-30 1982-12-30 給電回路

Publications (1)

Publication Number Publication Date
CA1208385A true CA1208385A (en) 1986-07-22

Family

ID=16961148

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000444408A Expired CA1208385A (en) 1982-12-30 1983-12-29 Battery feed circuit for telephone subscriber line

Country Status (5)

Country Link
US (1) US4588860A (en, 2012)
EP (1) EP0116767B1 (en, 2012)
JP (1) JPS59125157A (en, 2012)
CA (1) CA1208385A (en, 2012)
DE (1) DE3377968D1 (en, 2012)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE433284B (sv) * 1982-09-17 1984-05-14 Ericsson Telefon Ab L M Anordning for strommatning av en abonnentapparat
JPS61154347A (ja) * 1984-12-27 1986-07-14 Fujitsu Ltd 交換機の給電回路
EP0303091A3 (de) * 1987-08-13 1991-05-29 Siemens Aktiengesellschaft Schaltungsanordnung für eine als Baueinheit vorliegende Teilnehmeranschlussschaltung eines digitalen Zeitmultiplex-Fernmeldenetzes
US5329585A (en) * 1992-11-30 1994-07-12 Motorola, Inc. Subscriber line interface circuit for controlling AC and DC output impedance
US5528688A (en) * 1994-09-28 1996-06-18 At&T Corp. Telephone battery feed circuit including noise reduction circuit
DE19636954B4 (de) * 1996-09-11 2005-08-18 Infineon Technologies Ag Teilnehmerschaltung
US6157716A (en) * 1998-05-08 2000-12-05 Bell Atlantic Corporation Power feed circuit providing both on-hook and off-hook power for telephone subscriber loop

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1563802A (en) * 1975-11-10 1980-04-02 Post Office Electronic current feed circuit
US4007335A (en) * 1975-11-12 1977-02-08 Bell Telephone Laboratories, Incorporated Telephone line battery feed circuit
US4130735A (en) * 1977-04-11 1978-12-19 Lorain Products Corporation Loop extender
US4272656A (en) * 1979-04-05 1981-06-09 Precision Monolithics, Inc. Quasi-resistive battery feed for telephone circuits
NL7903662A (nl) * 1979-05-10 1980-11-12 Philips Nv Lijncircuit.
US4292478A (en) * 1979-05-25 1981-09-29 Plessey Canada Limited Interface circuits
US4283604A (en) * 1979-06-04 1981-08-11 Tellabs, Inc. Current source circuits with common mode noise rejection
US4315106A (en) * 1979-11-28 1982-02-09 International Telephone And Telegraph Corporation Apparatus for regulating current supplied to a telephone line signal of the type employed in digital telephone systems
GB2071461B (en) * 1980-02-14 1984-01-25 Standard Telephones Cables Ltd Telephone line feed
US4315207A (en) * 1980-06-20 1982-02-09 Advanced Micro Devices, Inc. Current controlled battery feed circuit
US4359609A (en) * 1980-06-20 1982-11-16 Advanced Micro Devices, Inc. Circuit with feedback for controlling the impedance thereof
US4387273A (en) * 1980-08-25 1983-06-07 International Telephone And Telegraph Corporation Subscriber line interface circuit with impedance synthesizer
US4317963A (en) * 1980-09-22 1982-03-02 International Telephone And Telegraph Corporation Subscriber line interface circuit utilizing impedance synthesizer and shared voltage source for loop current regulation control
EP0057009B1 (en) * 1981-01-28 1985-07-03 Hitachi, Ltd. Current supply circuit
US4476350A (en) * 1981-02-17 1984-10-09 Bell Telephone Laboratories, Incorporated Battery feed circuit
US4388500A (en) * 1981-02-27 1983-06-14 Wescom, Inc. Electronic hybrid
US4431868A (en) * 1981-07-09 1984-02-14 International Telephone And Telegraph Corporation Solid state telephone line interface circuit with ringing capability

Also Published As

Publication number Publication date
JPH0468818B2 (en, 2012) 1992-11-04
DE3377968D1 (en) 1988-10-13
JPS59125157A (ja) 1984-07-19
EP0116767A3 (en) 1986-05-14
EP0116767B1 (en) 1988-09-07
US4588860A (en) 1986-05-13
EP0116767A2 (en) 1984-08-29

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Legal Events

Date Code Title Description
MKEX Expiry