ES8104886A1 - Perfeccionamientos en igualadores automaticos para transmi- sion digital por pares trenzados de conductos telefonicos. - Google Patents

Perfeccionamientos en igualadores automaticos para transmi- sion digital por pares trenzados de conductos telefonicos.

Info

Publication number
ES8104886A1
ES8104886A1 ES491693A ES491693A ES8104886A1 ES 8104886 A1 ES8104886 A1 ES 8104886A1 ES 491693 A ES491693 A ES 491693A ES 491693 A ES491693 A ES 491693A ES 8104886 A1 ES8104886 A1 ES 8104886A1
Authority
ES
Spain
Prior art keywords
branch
amplifier
frequency
digital transmission
equalizer
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.)
Expired
Application number
ES491693A
Other languages
English (en)
Other versions
ES491693A0 (es
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of ES491693A0 publication Critical patent/ES491693A0/es
Publication of ES8104886A1 publication Critical patent/ES8104886A1/es
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H04B3/14—Control of transmission; Equalising characterised by the equalising network used
    • H04B3/141—Control of transmission; Equalising characterised by the equalising network used using multiequalisers, e.g. bump, cosine, Bode

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Networks Using Active Elements (AREA)
  • Filters And Equalizers (AREA)

Abstract

IGUALADOR AUTOMATICO PARA TRANSMISION DIGITAL POR CABLES TELEFONICOS DE DOS CONDUCTORES. UN CABLE DE DOS CONDUCTORES (102) ENLAZA UN TERMINAL DE LA CENTRAL (100) CON UN TERMINAL DE ABONADO (101), AMBOS COMPUESTOS POR TRANSMISORES (105, 111) CONECTADOS A UNOS HIBRIDOS (112, 106), QUE MANTIENEN EQUILIBRIOS DE SEÑAL EN UNA AMPLIA GAMA DE FRECUENCIAS, A TRAVES DE LOS CUALES, Y POR LA LINEA (102), MANDAN SUS SEÑALES A UNOS IGUALADORES (106, 112) QUE SON ALIMENTADOS A LOS RECEPTORES (107, 113) Y A UNOS DETECTORES DE CRESTAS (107, 114) PARA, MEDIANTE UNOS COMPARADORES (109, 115), COMPARAR LA SEÑAL RECIBIDA CON UNA SEÑAL DE REFERENCIA (110, 116) Y ASI AJUSTAR LOS IGUALADORES (106, 112),
ES491693A 1979-05-25 1980-05-21 Perfeccionamientos en igualadores automaticos para transmi- sion digital por pares trenzados de conductos telefonicos. Expired ES8104886A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/042,453 US4273963A (en) 1979-05-25 1979-05-25 Automatic equalization for digital transmission systems

Publications (2)

Publication Number Publication Date
ES491693A0 ES491693A0 (es) 1981-05-16
ES8104886A1 true ES8104886A1 (es) 1981-05-16

Family

ID=21922015

Family Applications (1)

Application Number Title Priority Date Filing Date
ES491693A Expired ES8104886A1 (es) 1979-05-25 1980-05-21 Perfeccionamientos en igualadores automaticos para transmi- sion digital por pares trenzados de conductos telefonicos.

Country Status (7)

Country Link
US (1) US4273963A (es)
EP (1) EP0020044B1 (es)
JP (1) JPS56500632A (es)
CA (1) CA1135430A (es)
DE (1) DE3064742D1 (es)
ES (1) ES8104886A1 (es)
WO (1) WO1980002783A1 (es)

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4381561A (en) * 1980-10-23 1983-04-26 International Telephone And Telegraph Corporation All digital LSI line circuit for analog lines
US4377858A (en) * 1980-10-23 1983-03-22 International Telephone And Telegraph Corporation Digital two-to-four wire converter for full duplex signals
US4343971A (en) * 1981-02-17 1982-08-10 Reliance Electric Company Subscriber drop circuit for controlling drop current with load and maximizing power usage
NL8204087A (nl) * 1982-10-22 1984-05-16 Philips Nv Automatisch instelbaar egalisatie netwerk.
US4520489A (en) * 1983-08-15 1985-05-28 Rockwell International Corporation Decision feedback equalizing apparatus
CA1200938A (en) * 1983-09-30 1986-02-18 Mitel Corporation Voice and data interface circuit
EP0139814A3 (de) * 1983-09-30 1986-07-30 Siemens-Albis Aktiengesellschaft Aktive Entzerrerschaltung
IT1186194B (it) * 1985-11-15 1987-11-18 Gte Telecom Spa Circuito sfasatore-equalizzatore
US4663583A (en) * 1986-05-27 1987-05-05 At&T Company Automatically variable phase characteristic all-pass circuit
US4745622A (en) * 1986-07-29 1988-05-17 Integrated Network Corporation Equalizer for digital transmission systems
US4887278A (en) * 1986-07-29 1989-12-12 Integrated Network Corporation Equalizer for digital transmission systems
JPH0748675B2 (ja) * 1987-08-21 1995-05-24 日本電気株式会社 デジタル伝送方式
FR2634608B1 (fr) * 1988-07-22 1994-05-06 Etat Francais Cnet Reseau domotique cable multipoints reconfigurable de distribution simultanee et/ou alternative de plusieurs types de signaux, notamment de signaux d'images en bande de base, et procede de configuration d'un tel reseau
US4996497A (en) * 1989-06-05 1991-02-26 American Dynamics Corporation Cable compensation circuit
US4962520A (en) * 1989-12-08 1990-10-09 Alcatel Na, Inc. Composite ringing and coin control voltage detector and method
US6972786B1 (en) 1994-12-30 2005-12-06 Collaboration Properties, Inc. Multimedia services using central office
US5751338A (en) * 1994-12-30 1998-05-12 Visionary Corporate Technologies Methods and systems for multimedia communications via public telephone networks
GB2306068B (en) * 1995-10-06 1999-07-07 Plessey Semiconductors Ltd LAN equalizer
GB9520468D0 (en) * 1995-10-06 1995-12-06 Plessey Semiconductors Ltd Lan equalizer
JP3724773B2 (ja) * 1998-03-18 2005-12-07 富士通株式会社 Ｌｔ−ｎｔ間長距離伝送方式及びその装置
US6940539B1 (en) * 1999-04-30 2005-09-06 General Electric Company Variable cable length compensator for video imaging systems
EP1154586B1 (en) * 2000-05-12 2006-01-18 STMicroelectronics S.r.l. Equaliser
US7047556B2 (en) * 2001-06-08 2006-05-16 Rgb Systems, Inc. Method and apparatus for equalizing video transmitted over twisted pair cable
EP1622285A3 (en) * 2004-07-09 2010-01-20 Vrije Universiteit Brussel Multistage equalizer
EP1615351A1 (en) * 2004-07-09 2006-01-11 Vrije Universiteit Brussel Multistage equalizer
US7564899B2 (en) * 2005-02-04 2009-07-21 Vrije Universiteit Brussel Multistage tuning-tolerant equalizer filter
JOP20130213B1 (ar) 2012-07-17 2021-08-17 Takeda Pharmaceuticals Co معارضات لمستقبلht3-5
US8937990B2 (en) 2012-08-31 2015-01-20 Fujitsu Limited Low-frequency equalizer circuit for a high-speed broadband signal
CN108183696B (zh) * 2018-03-06 2023-10-10 厦门优迅高速芯片有限公司 一种低压高速可编程均衡电路

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3383616A (en) * 1964-12-07 1968-05-14 Bell Telephone Labor Inc Feedback amplifier with adjustable equalization
US3568100A (en) * 1967-12-26 1971-03-02 Bell Telephone Labor Inc Automatic equalizer for digital transmission systems
JPS527304B1 (es) * 1969-08-29 1977-03-01
US3624539A (en) * 1969-12-17 1971-11-30 Bell Telephone Labor Inc Equalizer having a plurality of main path shaping networks and feedforward and feedback paths
US3652952A (en) * 1970-05-19 1972-03-28 Bell Telephone Labor Inc Electronically variable line build-out network
US3649916A (en) * 1970-11-18 1972-03-14 Hughes Aircraft Co Automatic equalizer for communication channels
US3803359A (en) * 1971-06-08 1974-04-09 Mc Intosh Labor Inc Equalization system for power amplifier and loudspeaker system
US3728649A (en) * 1972-04-24 1973-04-17 Bell Telephone Labor Inc Automatic equalizer for digital cable transmission systems
US3811016A (en) * 1972-11-01 1974-05-14 Hitachi Ltd Low frequency cut-off compensation system for baseband pulse transmission lines
FR2238300B1 (es) * 1973-07-20 1976-11-12 Lignes Telegraph Telephon
GB1490970A (en) * 1973-12-22 1977-11-09 Dolby Laboratories Inc Equalizers
US3898564A (en) * 1974-03-11 1975-08-05 Bell Telephone Labor Inc Margin monitoring circuit for repeatered digital transmission line
US3919502A (en) * 1974-08-19 1975-11-11 Bell Telephone Labor Inc Balancing network for voice frequency telephone repeaters
DE2451912C3 (de) * 1974-10-31 1980-02-07 Siemens Ag, 1000 Berlin Und 8000 Muenchen Schaltungsanordnung zur Entzerrung des Dämpfungsverlaufs eines Niederfrequenzkabels
JPS5169914A (en) * 1974-12-16 1976-06-17 Kokusai Denshin Denwa Co Ltd Kaiteikeeburuchukeikeino shisutemutokahoshiki
US4004102A (en) * 1975-08-08 1977-01-18 Bell Telephone Laboratories, Incorporated Automatic impedance modification of transmission lines
JPS6058604B2 (ja) * 1977-04-18 1985-12-20 株式会社日立製作所 傾斜形可変等化器
US4174470A (en) * 1978-10-10 1979-11-13 Bell Telephone Laboratories, Incorporated Electronic hybrid

Also Published As

Publication number Publication date
ES491693A0 (es) 1981-05-16
EP0020044B1 (en) 1983-09-07
DE3064742D1 (en) 1983-10-13
US4273963A (en) 1981-06-16
EP0020044A1 (en) 1980-12-10
JPS56500632A (es) 1981-05-07
WO1980002783A1 (en) 1980-12-11
CA1135430A (en) 1982-11-09

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19990405