SE457923B - Anordning foer att aastadkomma en styrbar linjeavslutningsimpedans - Google Patents

Anordning foer att aastadkomma en styrbar linjeavslutningsimpedans

Info

Publication number
SE457923B
SE457923B SE8702486A SE8702486A SE457923B SE 457923 B SE457923 B SE 457923B SE 8702486 A SE8702486 A SE 8702486A SE 8702486 A SE8702486 A SE 8702486A SE 457923 B SE457923 B SE 457923B
Authority
SE
Sweden
Prior art keywords
wire
circuit
converter
delayed
controllable
Prior art date
Application number
SE8702486A
Other languages
English (en)
Swedish (sv)
Other versions
SE8702486D0 (sv
SE8702486L (sv
Inventor
A G Eriksson
N O Johannesson
Original Assignee
Ellemtel Utvecklings Ab
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 Ellemtel Utvecklings Ab filed Critical Ellemtel Utvecklings Ab
Priority to SE8702486A priority Critical patent/SE457923B/sv
Publication of SE8702486D0 publication Critical patent/SE8702486D0/xx
Priority to PCT/SE1988/000254 priority patent/WO1988010539A1/en
Priority to EP19880906145 priority patent/EP0321540A1/de
Priority to AU19576/88A priority patent/AU1957688A/en
Priority to PT8768688A priority patent/PT87686A/pt
Priority to ES8801804A priority patent/ES2008537A6/es
Priority to GR880100377A priority patent/GR880100377A/el
Publication of SE8702486L publication Critical patent/SE8702486L/
Publication of SE457923B publication Critical patent/SE457923B/sv

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/005—Interface circuits for subscriber lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/54—Circuits using the same frequency for two directions of communication
    • H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
    • H04B1/586—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa using an electronic circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Networks Using Active Elements (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
SE8702486A 1987-06-15 1987-06-15 Anordning foer att aastadkomma en styrbar linjeavslutningsimpedans SE457923B (sv)

Priority Applications (7)

Application Number Priority Date Filing Date Title
SE8702486A SE457923B (sv) 1987-06-15 1987-06-15 Anordning foer att aastadkomma en styrbar linjeavslutningsimpedans
PCT/SE1988/000254 WO1988010539A1 (en) 1987-06-15 1988-05-18 Apparatus for achieving a controllable line termination impedance
EP19880906145 EP0321540A1 (de) 1987-06-15 1988-05-18 Vorrichtng zur herstellung einer regelbaren linienendimpedanz
AU19576/88A AU1957688A (en) 1987-06-15 1988-05-18 Apparatus for achieving a controllable line termination impedance
PT8768688A PT87686A (pt) 1987-06-15 1988-06-08 Aparelho para obter uma impedancia terminal controlavel de linha
ES8801804A ES2008537A6 (es) 1987-06-15 1988-06-10 Un aparato para crear una impedancia compleja controlable de terminacion de linea.
GR880100377A GR880100377A (el) 1987-06-15 1988-06-13 Συσκευη για την επιτευξη ελεγξιμης συνθετης αντιστασης γραμμης τερματισμου

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8702486A SE457923B (sv) 1987-06-15 1987-06-15 Anordning foer att aastadkomma en styrbar linjeavslutningsimpedans

Publications (3)

Publication Number Publication Date
SE8702486D0 SE8702486D0 (sv) 1987-06-15
SE8702486L SE8702486L (sv) 1988-12-16
SE457923B true SE457923B (sv) 1989-02-06

Family

ID=20368864

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8702486A SE457923B (sv) 1987-06-15 1987-06-15 Anordning foer att aastadkomma en styrbar linjeavslutningsimpedans

Country Status (7)

Country Link
EP (1) EP0321540A1 (de)
AU (1) AU1957688A (de)
ES (1) ES2008537A6 (de)
GR (1) GR880100377A (de)
PT (1) PT87686A (de)
SE (1) SE457923B (de)
WO (1) WO1988010539A1 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5073924A (en) * 1990-05-01 1991-12-17 Frisby Kenneth G Telephone line noise filter apparatus
JPH04280597A (ja) * 1991-03-08 1992-10-06 Nec Corp 加入者回路
IT1259009B (it) * 1992-07-24 1996-03-11 Italtel Telematica Metodo e dispositivo per l'adattamento delle impedenze della terminazione di utente e dell'attacco di utente alla impedenza caratteristica della linea telefonica di utente
ATE187029T1 (de) * 1993-09-02 1999-12-15 Siemens Ag Schaltungsanordnung zur erzeugung einer variablen leitungsabschlussimpedanz
AU681169B2 (en) * 1993-10-01 1997-08-21 Alcatel Australia Limited Line termination circuit
EP0693846A3 (de) * 1994-06-24 1999-05-26 Harris Corporation Fernsprechteilnehmerleitungsschnittstelle und Verfahren
US5583934A (en) * 1995-03-03 1996-12-10 Advanced Micro Devices, Inc. DC level control for an electronic telephone line card
SE511825C2 (sv) * 1998-03-31 1999-12-06 Ericsson Telefon Ab L M Förfarande och anordning i en analog linjekrets
KR100408739B1 (ko) * 2001-12-04 2003-12-11 엘지이노텍 주식회사 교환기 가입자 보드용 아날로그 슬릭 회로
US7062037B2 (en) 2002-04-30 2006-06-13 Texas Instruments Incorporated Generic line impedance matching circuit using decomposed configurable transfer functions

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU536210B2 (en) * 1980-06-18 1984-04-19 Telefonaktiebolaget Lm Ericsson (Publ) Subscriber line audio processing circuit apparatus
JPS5895488A (ja) * 1981-12-02 1983-06-07 Hitachi Ltd ライン回路
DE3586696T2 (de) * 1984-05-30 1993-04-01 Hitachi Ltd Pcm-coder/decoder mit zweidraht/vierdrahtumwandlung.
GB8528843D0 (en) * 1985-11-22 1985-12-24 British Telecomm Codec

Also Published As

Publication number Publication date
ES2008537A6 (es) 1989-07-16
WO1988010539A1 (en) 1988-12-29
PT87686A (pt) 1989-05-31
GR880100377A (el) 1989-03-08
AU1957688A (en) 1989-01-19
SE8702486D0 (sv) 1987-06-15
EP0321540A1 (de) 1989-06-28
SE8702486L (sv) 1988-12-16

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Legal Events

Date Code Title Description
NAV Patent application has lapsed

Ref document number: 8702486-5

Effective date: 19891215