SE7807289L - Matningsanordning for en linjekrets - Google Patents

Matningsanordning for en linjekrets

Info

Publication number
SE7807289L
SE7807289L SE7807289A SE7807289A SE7807289L SE 7807289 L SE7807289 L SE 7807289L SE 7807289 A SE7807289 A SE 7807289A SE 7807289 A SE7807289 A SE 7807289A SE 7807289 L SE7807289 L SE 7807289L
Authority
SE
Sweden
Prior art keywords
line circuit
supply device
subscriber
voltages
mark
Prior art date
Application number
SE7807289A
Other languages
English (en)
Swedish (sv)
Other versions
SE436314B (sv
Inventor
K-D K Brockmann
Original Assignee
Philips Nv
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 Philips Nv filed Critical Philips Nv
Publication of SE7807289L publication Critical patent/SE7807289L/
Publication of SE436314B publication Critical patent/SE436314B/sv

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
SE7807289A 1978-03-06 1978-06-28 Matningsanordning for en linjekrets SE436314B (sv)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7802423A NL7802423A (nl) 1978-03-06 1978-03-06 Voedingsinrichting voor een lijnstroomloop.

Publications (2)

Publication Number Publication Date
SE7807289L true SE7807289L (sv) 1979-09-07
SE436314B SE436314B (sv) 1984-11-26

Family

ID=19830442

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7807289A SE436314B (sv) 1978-03-06 1978-06-28 Matningsanordning for en linjekrets

Country Status (10)

Country Link
US (1) US4192975A ( )
JP (1) JPS5945316B2 ( )
AU (1) AU512886B2 ( )
BE (1) BE868519A ( )
CA (1) CA1109171A ( )
DE (1) DE2826762C2 ( )
FR (1) FR2419627B1 ( )
GB (1) GB1557149A ( )
NL (1) NL7802423A ( )
SE (1) SE436314B ( )

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7802422A (nl) * 1978-03-06 1979-09-10 Philips Nv Inrichting voor het meten van de lijnconditie van een abonneelijnstroomloop met behulp van een meetweerstand.
WO1981000658A1 (en) * 1979-08-31 1981-03-05 Electro Med Eng Pty Ltd Telephone line data isolator
GB2064268B (en) * 1979-09-17 1983-10-26 Philips Nv Electronic signalling device for connection to a signal transmission line
GB2065418B (en) * 1979-12-06 1984-02-15 Standard Telephones Cables Ltd Telephone line feed
US4354062A (en) * 1980-01-31 1982-10-12 Bell Telephone Laboratories, Incorporated Communication system signaling circuit
NL8000859A (nl) * 1980-02-12 1981-09-01 Philips Nv Inrichting voor het toevoeren van een wekspanning aan een abonneelijn.
GB2071461B (en) * 1980-02-14 1984-01-25 Standard Telephones Cables Ltd Telephone line feed
SE426761B (sv) * 1980-12-09 1983-02-07 Ellemtel Utvecklings Ab Pulsbreddsmodulerad spenningsomvandlare for omvandling av en likspenning till en lagfrekvent och foretredesvis sinusformad vexelspenning
SE455978B (sv) * 1980-12-19 1988-08-22 Ellemtel Utvecklings Ab Pulsbreddsmodulerad effektforsterkare for att i beroende av en styrande insignal omvandla en likspenning till en lagfrekvent utsignal
AT384337B (de) * 1982-07-22 1987-10-27 Alcatel Austria Ag Schnittstellenschaltung mit zweidraht-vierdraht- umsetzung fuer fernsprechvermittlungsanlagen
JPS61120558A (ja) * 1984-11-15 1986-06-07 Nitsuko Ltd 呼出し信号送出回路
JPS61179647A (ja) * 1984-12-29 1986-08-12 Fujitsu Ltd サ−ビス表示用ランプの点灯方法
AU593951B2 (en) * 1986-10-20 1990-02-22 Fujitsu Limited An integrated ringing circuit and a ring trip circuit for the same
AT408935B (de) * 1993-08-02 2002-04-25 Schrack Telecom Ag Vorfeldeinrichtung
US5960075A (en) * 1995-02-16 1999-09-28 Northern Telecom Limited Switchmode power converters for telephone subscriber line interface circuits
GB2358989B (en) * 2000-02-03 2004-01-21 Lake Electronic Tech A circuit for developing an ac ringing voltage from a dc voltage supply

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3376494A (en) * 1965-05-20 1968-04-02 Power Conversion Inc High frequency controlled rectifier circuit
BE756517A (fr) * 1969-09-23 1971-03-01 Ericsson Telefon Ab L M Interrupteur pour signaux d'appel de centraux telephoniques automatiques
DE2347696C3 (de) * 1973-09-21 1978-12-21 Siemens Ag, 1000 Berlin Und 8000 Muenchen Schaltungsanordnung zum Speisen von Teilnehmeranschlußleitungen in Fernsprechvermittlungsanlagen
CA1013080A (en) * 1973-11-13 1977-06-28 Gte Automatic Electric Laboratories Incorporated Communication system interface circuits
JPS553906B2 ( ) * 1974-07-15 1980-01-28
FR2371840A1 (fr) * 1976-10-04 1978-06-16 Ibm France Circuit d'interface

Also Published As

Publication number Publication date
NL7802423A (nl) 1979-09-10
JPS54118715A (en) 1979-09-14
CA1109171A (en) 1981-09-15
JPS5945316B2 (ja) 1984-11-05
FR2419627B1 (fr) 1986-06-20
DE2826762A1 (de) 1979-09-13
AU3672778A (en) 1979-12-06
US4192975A (en) 1980-03-11
DE2826762C2 (de) 1982-09-30
SE436314B (sv) 1984-11-26
AU512886B2 (en) 1980-10-30
BE868519A (fr) 1978-12-27
GB1557149A (en) 1979-12-05
FR2419627A1 (fr) 1979-10-05

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