NL8006307A - Lijnvoedingsschakeling. - Google Patents

Lijnvoedingsschakeling. Download PDF

Info

Publication number
NL8006307A
NL8006307A NL8006307A NL8006307A NL8006307A NL 8006307 A NL8006307 A NL 8006307A NL 8006307 A NL8006307 A NL 8006307A NL 8006307 A NL8006307 A NL 8006307A NL 8006307 A NL8006307 A NL 8006307A
Authority
NL
Netherlands
Prior art keywords
circuit
line
operational amplifier
speech
current
Prior art date
Application number
NL8006307A
Other languages
English (en)
Dutch (nl)
Original Assignee
Standard Telephones Cables 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 Standard Telephones Cables Ltd filed Critical Standard Telephones Cables Ltd
Publication of NL8006307A publication Critical patent/NL8006307A/nl

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
NL8006307A 1979-11-29 1980-11-19 Lijnvoedingsschakeling. NL8006307A (nl)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7941245 1979-11-29
GB7941245A GB2064915B (en) 1979-11-29 1979-11-29 Telephone line feed circuit

Publications (1)

Publication Number Publication Date
NL8006307A true NL8006307A (nl) 1981-07-01

Family

ID=10509491

Family Applications (1)

Application Number Title Priority Date Filing Date
NL8006307A NL8006307A (nl) 1979-11-29 1980-11-19 Lijnvoedingsschakeling.

Country Status (13)

Country Link
US (1) US4345117A (it)
JP (1) JPS5690671A (it)
AU (1) AU535131B2 (it)
BE (1) BE890402A (it)
FR (1) FR2471100B1 (it)
GB (1) GB2064915B (it)
IE (1) IE50881B1 (it)
IT (1) IT1134498B (it)
NL (1) NL8006307A (it)
NZ (1) NZ195574A (it)
PT (1) PT72123B (it)
SE (1) SE8008104L (it)
ZA (1) ZA807308B (it)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2066023B (en) * 1979-12-13 1983-11-09 Standard Telephones Cables Ltd Telephone line interface
EP0057009B1 (en) * 1981-01-28 1985-07-03 Hitachi, Ltd. Current supply circuit
JPS57154965A (en) * 1981-03-19 1982-09-24 Fujitsu Ltd Constant current source type filter having self-bias function
SE431704B (sv) * 1982-07-06 1984-02-20 Ericsson Telefon Ab L M Forfarande vid strommatning av en abonnentapparat fran en telefonvexel
SE433285B (sv) * 1982-09-22 1984-05-14 Ericsson Telefon Ab L M Anordning for strommatning av en abonnentapparat
US4577064A (en) * 1983-04-29 1986-03-18 Gte Lenkurt Incorporated Auto-balance circuit for battery feed in a telephone circuit
SE465799B (sv) * 1990-03-15 1991-10-28 Ericsson Telefon Ab L M Anordning foer reducerad effektmatning till en abonnentlinje

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3870896A (en) * 1972-10-30 1975-03-11 Lorain Prod Corp Controllable current source
FR2279287A1 (fr) * 1974-07-16 1976-02-13 Cit Alcatel Unite d'alimentation a intensite constante
US4037066A (en) * 1975-03-20 1977-07-19 Lorain Products Corporation Repeater for transmission lines
US4048552A (en) * 1976-02-12 1977-09-13 Bell Telephone Laboratories, Incorporated Digitally regulated inverter
US4142075A (en) * 1977-10-11 1979-02-27 Burr-Brown Research Corporation Interface circuit and method for telephone extension lines
US4268723A (en) * 1979-09-04 1981-05-19 Western Electric Company Circuits and methods for initializing the loop current of a telephone set

Also Published As

Publication number Publication date
PT72123A (en) 1980-12-01
NZ195574A (en) 1984-04-27
IE802484L (en) 1981-05-29
BE890402A (fr) 1982-01-18
ZA807308B (en) 1981-11-25
AU6462480A (en) 1981-06-04
IT1134498B (it) 1986-08-13
FR2471100B1 (fr) 1985-06-28
GB2064915B (en) 1984-03-21
FR2471100A1 (fr) 1981-06-12
GB2064915A (en) 1981-06-17
IE50881B1 (en) 1986-08-06
SE8008104L (sv) 1981-05-30
IT8026297A0 (it) 1980-11-28
PT72123B (en) 1981-11-02
AU535131B2 (en) 1984-03-01
US4345117A (en) 1982-08-17
JPS5690671A (en) 1981-07-22

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Legal Events

Date Code Title Description
A85 Still pending on 85-01-01
BV The patent application has lapsed