AU1957688A - Apparatus for achieving a controllable line termination impedance - Google Patents

Apparatus for achieving a controllable line termination impedance

Info

Publication number: AU1957688A
Authority: AU; Australia
Prior art keywords: achieving; line termination; termination impedance; controllable line; controllable
Prior art date: 1987-06-15
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.): Abandoned

Application number

AU19576/88A

Inventor

Anders Gunnar Eriksson

Nils-Olof Johannesson

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.)

Telefonaktiebolaget LM Ericsson AB

Original Assignee

Telefonaktiebolaget LM Ericsson 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.)

1987-06-15

Filing date

1988-05-18

Publication date

1989-01-19

1988-05-18 Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB

1989-01-19 Publication of AU1957688A publication Critical patent/AU1957688A/en

Status Abandoned legal-status Critical Current

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)

AU19576/88A 1987-06-15 1988-05-18 Apparatus for achieving a controllable line termination impedance Abandoned AU1957688A (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
SE8702486A SE457923B (en)	1987-06-15	1987-06-15	DEVICE TO ACHIEVE A CONTROLLABLE LINE CUT IMPEDANCE
SE8702486		1987-06-15

Publications (1)

Publication Number	Publication Date
AU1957688A true AU1957688A (en)	1989-01-19

Family

ID=20368864

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
AU19576/88A Abandoned AU1957688A (en)	1987-06-15	1988-05-18	Apparatus for achieving a controllable line termination impedance

Country Status (7)

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

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 (en) *	1991-03-08	1992-10-06	Nec Corp	Subscriber circuit
IT1259009B (en) *	1992-07-24	1996-03-11	Italtel Telematica	METHOD AND DEVICE FOR THE ADAPTATION OF USER TERMINATION IMPEDANCES AND USER ATTACK TO THE CHARACTERISTIC IMPEDANCE OF THE USER TELEPHONE LINE
EP0642229B1 (en) *	1993-09-02	1999-11-24	Siemens Aktiengesellschaft	Circuit for generating a variable line termination impedance
AU681169B2 (en) *	1993-10-01	1997-08-21	Alcatel Australia Limited	Line termination circuit
JPH0851651A (en) *	1994-06-24	1996-02-20	Harris Corp	Subscriber's line interface circuit,impedance matching method and echo canceling method between hybrids
US5583934A (en) *	1995-03-03	1996-12-10	Advanced Micro Devices, Inc.	DC level control for an electronic telephone line card
SE511825C2 (en) *	1998-03-31	1999-12-06	Ericsson Telefon Ab L M	Method and apparatus in an analog line circuit
KR100408739B1 (en) *	2001-12-04	2003-12-11	엘지이노텍 주식회사	Analog slic circuit for board of switch board subscriber
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 (en) *	1981-12-02	1983-06-07	Hitachi Ltd	Line circuit
DE3586696T2 (en) *	1984-05-30	1993-04-01	Hitachi Ltd	PCM CODER / DECODER WITH TWO-WIRE / FOUR-WIRE CONVERSION.
GB8528843D0 (en) *	1985-11-22	1985-12-24	British Telecomm	Codec

1987
- 1987-06-15 SE SE8702486A patent/SE457923B/en not_active Application Discontinuation
1988
- 1988-05-18 WO PCT/SE1988/000254 patent/WO1988010539A1/en not_active Application Discontinuation
- 1988-05-18 AU AU19576/88A patent/AU1957688A/en not_active Abandoned
- 1988-05-18 EP EP19880906145 patent/EP0321540A1/en not_active Withdrawn
- 1988-06-08 PT PT8768688A patent/PT87686A/en unknown
- 1988-06-10 ES ES8801804A patent/ES2008537A6/en not_active Expired
- 1988-06-13 GR GR880100377A patent/GR880100377A/en unknown

Also Published As

Publication number	Publication date
SE8702486L (en)	1988-12-16
EP0321540A1 (en)	1989-06-28
ES2008537A6 (en)	1989-07-16
WO1988010539A1 (en)	1988-12-29
GR880100377A (en)	1989-03-08
PT87686A (en)	1989-05-31
SE457923B (en)	1989-02-06
SE8702486D0 (en)	1987-06-15

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