CA2046250A1 - Circuit hybride avec interface deux fils/quatre fils - Google Patents

Circuit hybride avec interface deux fils/quatre fils

Info

Publication number
CA2046250A1
CA2046250A1 CA2046250A CA2046250A CA2046250A1 CA 2046250 A1 CA2046250 A1 CA 2046250A1 CA 2046250 A CA2046250 A CA 2046250A CA 2046250 A CA2046250 A CA 2046250A CA 2046250 A1 CA2046250 A1 CA 2046250A1
Authority
CA
Canada
Prior art keywords
wire
echo
function
conversion unit
digital
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.)
Granted
Application number
CA2046250A
Other languages
English (en)
Other versions
CA2046250C (fr
Inventor
Mitsuo Kakuishi
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
Publication of CA2046250A1 publication Critical patent/CA2046250A1/fr
Application granted granted Critical
Publication of CA2046250C publication Critical patent/CA2046250C/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
    • H04B3/238—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers using initial training sequence

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Filters That Use Time-Delay Elements (AREA)
CA002046250A 1990-07-06 1991-07-04 Circuit hybride avec interface deux fils/quatre fils Expired - Fee Related CA2046250C (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2-177339 1990-07-06
JP2177339A JP2520770B2 (ja) 1990-07-06 1990-07-06 ハイブリッド回路

Publications (2)

Publication Number Publication Date
CA2046250A1 true CA2046250A1 (fr) 1992-01-07
CA2046250C CA2046250C (fr) 1995-02-14

Family

ID=16029239

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002046250A Expired - Fee Related CA2046250C (fr) 1990-07-06 1991-07-04 Circuit hybride avec interface deux fils/quatre fils

Country Status (5)

Country Link
US (1) US5287406A (fr)
EP (1) EP0467163B1 (fr)
JP (1) JP2520770B2 (fr)
CA (1) CA2046250C (fr)
DE (1) DE69104288T2 (fr)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5253249A (en) * 1989-06-29 1993-10-12 Digital Equipment Corporation Bidirectional transceiver for high speed data system
ATE187029T1 (de) * 1993-09-02 1999-12-15 Siemens Ag Schaltungsanordnung zur erzeugung einer variablen leitungsabschlussimpedanz
WO1995031052A1 (fr) * 1994-05-06 1995-11-16 Ntt Mobile Communications Network Inc. Compensateur d'echos et procede d'estimation de la trajectoire de l'echo
CA2162571C (fr) * 1994-05-07 2001-03-13 Toshiro Kawahara Compensateur d'echo et son procede d'apprentissage
US5912924A (en) * 1996-08-15 1999-06-15 Seeq Technology, Inc. Bidirectional channels using common pins for transmit and receive paths
US5953412A (en) * 1996-09-04 1999-09-14 Teltrend, Inc. Method and apparatus for controlling line conditioner equalizer
US5974137A (en) * 1996-09-04 1999-10-26 Teltrend, Inc. AGC amplifier for two-wire line conditioner
US5963638A (en) 1996-09-04 1999-10-05 Teltrend, Inc. Adjustable hybrid having improved biasing configuration
US6111949A (en) * 1996-09-04 2000-08-29 Teltrend, Inc. Method of rapid automatic hybrid balancing
US5790658A (en) * 1996-10-28 1998-08-04 Advanced Micro Devices, Inc. High performance echo canceller for high speed modem
FR2759835A1 (fr) * 1997-02-17 1998-08-21 Thomson Multimedia Sa Procede de compensation des attenuations affectant les niveaux des signaux echanges dans un reseau de communication
US7072476B2 (en) * 1997-02-18 2006-07-04 Matech, Inc. Audio headset
JP3710606B2 (ja) * 1997-09-04 2005-10-26 松下電器産業株式会社 エコーキャンセラ
US6298046B1 (en) * 1998-08-28 2001-10-02 Rc Networks Adjustable balancing circuit for an adaptive hybrid and method of adjusting the same
US6606212B1 (en) 1999-03-17 2003-08-12 International Business Machines Corporation Wideband readout of magneto-resistive heads for data storage
JP3293029B2 (ja) * 1999-08-20 2002-06-17 株式会社マイクロエムズ 通信装置用２線４線変換回路
EP1107464A1 (fr) 1999-12-06 2001-06-13 Alcatel Procedé et circuit d'annulation d'echo
DE10247208A1 (de) * 2002-10-10 2004-04-22 Infineon Technologies Ag Brückenschaltung zur Echounterdrückung in Kommunikationseinrichtungen
WO2005048572A2 (fr) * 2003-11-11 2005-05-26 Matech, Inc. Dispositif de communication bilaterale equipe d'un seul transducteur
WO2005048574A1 (fr) * 2003-11-11 2005-05-26 Matech, Inc. Dispositif de communication sans fil a commutation automatique
DE10360857B4 (de) * 2003-12-23 2006-01-12 Airbus Deutschland Gmbh Transformatorische Busankopplung
EP1548951B1 (fr) 2003-12-26 2011-06-22 Alcatel Lucent Appareil de régulation pour équilibrer l'impédance d'une ligne de transmission
US7554933B2 (en) * 2004-01-09 2009-06-30 Realtek Semiconductor Corp. Echo cancellation device for full duplex communication systems
US7738408B2 (en) * 2004-01-09 2010-06-15 Realtek Semiconductor Corp. Transceiver for full duplex communication systems
US8315379B2 (en) * 2004-11-10 2012-11-20 Matech, Inc. Single transducer full duplex talking circuit
WO2009100119A1 (fr) * 2008-02-05 2009-08-13 Donaldson Company, Inc. Collecteur de poussière, dispositif de filtration et procédés
KR101408755B1 (ko) * 2009-07-28 2014-06-17 파나소닉 주식회사 통신 시스템 및 통신 단말기
US9634964B2 (en) 2012-11-12 2017-04-25 Tencent Technology (Shenzhen) Company Limited Contact matching method, instant messaging client, server and system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6046899B2 (ja) * 1980-09-26 1985-10-18 日本電気株式会社 反響消去装置
US4377858A (en) * 1980-10-23 1983-03-22 International Telephone And Telegraph Corporation Digital two-to-four wire converter for full duplex signals
JPS59168711A (ja) * 1983-03-15 1984-09-22 Oki Electric Ind Co Ltd ハイブリツド回路
JPH0720070B2 (ja) * 1985-08-14 1995-03-06 株式会社日立製作所 デイジタル平衡回路を有するｐｃｍ符号復号器
JPS63200623A (ja) * 1987-02-17 1988-08-18 Nippon Telegr & Teleph Corp <Ntt> 自動ハイブリツド回路
JPH0752859B2 (ja) * 1987-11-06 1995-06-05 日本電気株式会社 エコー除去装置

Also Published As

Publication number Publication date
CA2046250C (fr) 1995-02-14
DE69104288D1 (de) 1994-11-03
DE69104288T2 (de) 1995-03-02
JP2520770B2 (ja) 1996-07-31
JPH0468809A (ja) 1992-03-04
EP0467163B1 (fr) 1994-09-28
US5287406A (en) 1994-02-15
EP0467163A1 (fr) 1992-01-22

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