BR9904250A - Sistema de controle para redução de distorção produzida por circuitos elétricos - Google Patents

Sistema de controle para redução de distorção produzida por circuitos elétricos

Info

Publication number
BR9904250A
BR9904250A BR9904250-9A BR9904250A BR9904250A BR 9904250 A BR9904250 A BR 9904250A BR 9904250 A BR9904250 A BR 9904250A BR 9904250 A BR9904250 A BR 9904250A
Authority
BR
Brazil
Prior art keywords
control system
electrical circuit
electrical circuits
distortion produced
reduce distortion
Prior art date
Application number
BR9904250-9A
Other languages
English (en)
Inventor
Robert Evan Myer
Original Assignee
Lucent Technologies 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 Lucent Technologies Inc filed Critical Lucent Technologies Inc
Publication of BR9904250A publication Critical patent/BR9904250A/pt

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • H03F1/3223—Modifications of amplifiers to reduce non-linear distortion using feed-forward
    • H03F1/3229—Modifications of amplifiers to reduce non-linear distortion using feed-forward using a loop for error extraction and another loop for error subtraction

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Radio Relay Systems (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Stereo-Broadcasting Methods (AREA)
  • Noise Elimination (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

<B>SISTEMA DE CONTROLE PARA REDUçãO DE DISTORçãO PRODUZIDA POR CIRCUITOS ELéTRICOS<D> Um sistema de controle que compreende um circuito elétrico que produz distorção onde o circuito elétrico em uma faixa de freq³ências de operação. Um sinal da portadora modulado por piloto é variado em freq³ência em torno da faixa de freg³ências de operação. O sinal da portadora modulado por piloto variável não interfere em qualquer sinal aplicado ao circuito elétrico ou ali gerado, uma vez que não está em nenhum momento localizado dentro da faixa de freq³ências de operação. A informação obtida da portadora modulada por piloto variável é fornecida ao sistema de controle que utiliza tal informação para cancelar a distorção produzida pelo circuito elétrico.
BR9904250-9A 1998-09-29 1999-09-20 Sistema de controle para redução de distorção produzida por circuitos elétricos BR9904250A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/162,753 US6411644B1 (en) 1998-09-29 1998-09-29 Frequency hop pilot technique for a control system that reduces distortion produced by electrical circuits

Publications (1)

Publication Number Publication Date
BR9904250A true BR9904250A (pt) 2000-08-29

Family

ID=22586999

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9904250-9A BR9904250A (pt) 1998-09-29 1999-09-20 Sistema de controle para redução de distorção produzida por circuitos elétricos

Country Status (9)

Country Link
US (2) US6411644B1 (pt)
EP (1) EP0991183B1 (pt)
JP (1) JP2000151472A (pt)
KR (1) KR100642531B1 (pt)
CN (1) CN1120566C (pt)
AU (1) AU750671B2 (pt)
BR (1) BR9904250A (pt)
CA (1) CA2279095C (pt)
DE (1) DE69941617D1 (pt)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6411644B1 (en) * 1998-09-29 2002-06-25 Lucent Technologies Inc. Frequency hop pilot technique for a control system that reduces distortion produced by electrical circuits
US7054279B2 (en) * 2000-04-07 2006-05-30 Broadcom Corporation Method and apparatus for optimizing signal transformation in a frame-based communications network
US8238404B2 (en) * 2001-10-23 2012-08-07 Koninklijke Philps Electronics N.V. Method to improve ATSC-VSB transceiver performance employing a time-frequency waveform processor
JP3910167B2 (ja) * 2003-09-25 2007-04-25 松下電器産業株式会社 増幅回路
US7092353B2 (en) * 2003-10-17 2006-08-15 Qualcomm Incorporated Carrier search methods and apparatus
US20100197257A1 (en) * 2009-02-04 2010-08-05 Qualcomm Incorporated Adjustable receive filter responsive to frequency spectrum information
DE102011012843A1 (de) 2011-03-03 2012-09-06 Valeo Schalter Und Sensoren Gmbh Fahrerassistenzeinrichtung für ein Fahrzeug und Verfahren zum Betreiben eines Radargeräts

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US5565814A (en) * 1994-12-21 1996-10-15 Nec Corporation Feedforward amplifier using frequency changeable pilot signal
GB2296615A (en) * 1994-12-21 1996-07-03 Univ Bristol Distortion and noise reduction in wide band feedforward amplifier/mixer
JP3360464B2 (ja) * 1995-02-13 2002-12-24 松下電器産業株式会社 フィードフォワード増幅器
WO1996042068A1 (en) * 1995-06-12 1996-12-27 Samsung Electronics Co., Ltd. Digitizer controller
JP3361657B2 (ja) 1995-07-20 2003-01-07 松下電器産業株式会社 フィードフォワード増幅器の制御装置および制御方法
US5694036A (en) * 1995-08-07 1997-12-02 Lucent Technologies Inc. Direction sensor and distortion reduction control circuitry
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US5789976A (en) * 1996-06-17 1998-08-04 Corporation De L'ecole Polytechnique Digital adaptive control of feedforward amplifier using frequency domain cancellation
SE507698C2 (sv) * 1996-07-10 1998-07-06 Allgon Ab Förfarande och system för avstämning resonansmoduler
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US5999048A (en) * 1998-01-13 1999-12-07 Lucent Technologies Inc. Method and apparatus for spread spectrum pilot extraction for RF amplifiers
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US6411644B1 (en) * 1998-09-29 2002-06-25 Lucent Technologies Inc. Frequency hop pilot technique for a control system that reduces distortion produced by electrical circuits
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Also Published As

Publication number Publication date
EP0991183B1 (en) 2009-11-04
CN1120566C (zh) 2003-09-03
CA2279095A1 (en) 2000-03-29
EP0991183A2 (en) 2000-04-05
CA2279095C (en) 2004-01-06
AU4888099A (en) 2000-03-30
US7035312B2 (en) 2006-04-25
EP0991183A3 (en) 2001-10-31
DE69941617D1 (de) 2009-12-17
US20020150146A1 (en) 2002-10-17
KR100642531B1 (ko) 2006-11-13
KR20000023532A (ko) 2000-04-25
US6411644B1 (en) 2002-06-25
CN1250247A (zh) 2000-04-12
AU750671B2 (en) 2002-07-25
JP2000151472A (ja) 2000-05-30

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Legal Events

Date Code Title Description
FA10 Dismissal: dismissal - article 33 of industrial property law
B11N Dismissal: publication cancelled
B06A Notification to applicant to reply to the report for non-patentability or inadequacy of the application [chapter 6.1 patent gazette]
B11B Dismissal acc. art. 36, par 1 of ipl - no reply within 90 days to fullfil the necessary requirements