WO1999066683A8 - Impedance matching interface for transmission loop - Google Patents

Impedance matching interface for transmission loop

Info

Publication number
WO1999066683A8
WO1999066683A8 PCT/US1999/012924 US9912924W WO9966683A8 WO 1999066683 A8 WO1999066683 A8 WO 1999066683A8 US 9912924 W US9912924 W US 9912924W WO 9966683 A8 WO9966683 A8 WO 9966683A8
Authority
WO
WIPO (PCT)
Prior art keywords
switch
impedance matching
coupling transformer
signal
line coupling
Prior art date
Application number
PCT/US1999/012924
Other languages
French (fr)
Other versions
WO1999066683A1 (en
Inventor
Naom Chaplik
Paul Anthony Iaizzo
Original Assignee
Rc Networks
Naom Chaplik
Paul Anthony Iaizzo
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 Rc Networks, Naom Chaplik, Paul Anthony Iaizzo filed Critical Rc Networks
Priority to AU45547/99A priority Critical patent/AU4554799A/en
Publication of WO1999066683A1 publication Critical patent/WO1999066683A1/en
Publication of WO1999066683A8 publication Critical patent/WO1999066683A8/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0264—Arrangements for coupling to transmission lines
    • H04L25/0266—Arrangements for providing Galvanic isolation, e.g. by means of magnetic or capacitive coupling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0264—Arrangements for coupling to transmission lines
    • H04L25/0278—Arrangements for impedance matching

Abstract

A line interface apparatus includes a line coupling transformer and an impedance matching circuit with two sections. A switch is used to switch either the first or the second section in series with the first winding of the line coupling transformer. A replica of the echo of the transmitted signal is subtracted from a composite signal comprising a received signal and the echo. The result of the subtraction is compared to a threshold value in a digital signal processor that also controls the switch. The output impedance of the interface is automatically matched to the input impedance of a loop connected to the second winding of the line coupling transformer. The result is the maintenance of a desirably high level of efficiency in coupling signal power to the loop.
PCT/US1999/012924 1998-06-16 1999-06-08 Impedance matching interface for transmission loop WO1999066683A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU45547/99A AU4554799A (en) 1998-06-16 1999-06-08 Impedance matching interface for transmission loop

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/098,139 US6400772B1 (en) 1998-06-16 1998-06-16 Line interface and method for detecting and eliminating an impedance mismatch between a transceiver and a transmission line
US09/098,139 1998-06-16

Publications (2)

Publication Number Publication Date
WO1999066683A1 WO1999066683A1 (en) 1999-12-23
WO1999066683A8 true WO1999066683A8 (en) 2000-04-06

Family

ID=22267436

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1999/012924 WO1999066683A1 (en) 1998-06-16 1999-06-08 Impedance matching interface for transmission loop

Country Status (3)

Country Link
US (1) US6400772B1 (en)
AU (1) AU4554799A (en)
WO (1) WO1999066683A1 (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL152540A0 (en) 2000-05-22 2003-05-29 Infineon Technologies Ag Termination device for a telephone line
US6343024B1 (en) * 2000-06-20 2002-01-29 Stmicroelectronics, Inc. Self-adjustable impedance line driver with hybrid
US6801621B1 (en) * 2000-06-26 2004-10-05 Globespanvirata, Inc. Circuit and method for active termination of a transmission line interface
EP1172981A3 (en) 2000-07-10 2006-11-15 Broadcom Corporation Analogue front end for xDSL
US6836544B1 (en) * 2000-08-24 2004-12-28 Intel Corporation Sidestone reduction in full duplex transceivers
US6870928B1 (en) * 2001-05-25 2005-03-22 Lsi Logic Corporation Line interface, apparatus and method for coupling transceiver and transmission line
EP1438832A4 (en) * 2001-10-25 2005-01-19 2Wire Inc Transformer-coupled matching impedance
US7221754B2 (en) * 2002-02-05 2007-05-22 Texas Instruments Incorporated Switchable hybrid design for asymmetric digital subscriber line
US7298838B2 (en) * 2002-02-05 2007-11-20 Texas Instruments Incorporated Adaptive cancellation network system and method for digital subscriber line
US7260142B2 (en) * 2002-03-07 2007-08-21 Texas Instruments Incorporated Dynamic hybrid switching in a wireline modem
US7194024B2 (en) 2003-01-29 2007-03-20 Texas Instruments Incorporated Method for adaptive hybrid selection during ADSL modem training
US7684499B2 (en) * 2005-08-30 2010-03-23 2Wire, Inc. Multi-band line interface circuit with line side cancellation
US7983373B2 (en) 2007-02-07 2011-07-19 Vintomie Networks B.V., Llc Clock distribution for 10GBase-T analog front end
US7907659B2 (en) * 2007-10-02 2011-03-15 2Wire, Inc. Dual-band line interface circuit capable of multi-band communication
AT509840B1 (en) * 2010-02-17 2013-03-15 Fts Computertechnik Gmbh SUPPRESSION OF OVERVOLTAGE CAUSED BY INDIRECT LIGHTNING
US9634646B1 (en) * 2015-10-27 2017-04-25 Analog Devices, Inc. Mismatch calibration of capacitive differential isolator
CN112152583B (en) * 2020-10-20 2021-03-30 江苏臻云技术有限公司 Cloud computing data security operation and maintenance system

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1957752A (en) 1925-08-11 1934-05-08 Rca Corp Method and apparatus for amplifying frequency currents
US3982080A (en) 1975-01-16 1976-09-21 Bell Telephone Laboratories, Incorporated Automatic cable balancing network
US4103118A (en) 1977-05-02 1978-07-25 Synanon Foundation, Inc. Autobalance hybrid circuit
US4096362A (en) 1977-06-20 1978-06-20 Bell Telephone Laboratories, Incorporated Automatic cable balancing network
JPS6412624A (en) * 1987-07-06 1989-01-17 Fujitsu Ltd Adaptive impedance matching system
US5133007A (en) 1989-10-26 1992-07-21 Ricoh Company, Ltd. Side tone correction circuit
US5034978A (en) 1989-12-15 1991-07-23 Xel Communications, Inc. Universal channel unit switchable between two wire and four wire configurations
US5204854A (en) 1991-08-23 1993-04-20 Sierra Semiconductor Corporation Adaptive hybrid
US5555263A (en) 1994-11-01 1996-09-10 Motorola Inc. Method and apparatus for reducing switching oscillations in an ISDN line interface circuit
EP0995263A1 (en) 1997-07-09 2000-04-26 Nokia Corporation Impedance match of transmission lines

Also Published As

Publication number Publication date
WO1999066683A1 (en) 1999-12-23
AU4554799A (en) 2000-01-05
US6400772B1 (en) 2002-06-04

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