BR9803352A - Sistema de controle automático para reduzir distorção produzida por circuitos elétricos - Google Patents

Sistema de controle automático para reduzir distorção produzida por circuitos elétricos

Info

Publication number
BR9803352A
BR9803352A BR9803352-2A BR9803352A BR9803352A BR 9803352 A BR9803352 A BR 9803352A BR 9803352 A BR9803352 A BR 9803352A BR 9803352 A BR9803352 A BR 9803352A
Authority
BR
Brazil
Prior art keywords
control system
reduce distortion
automatic control
distortion produced
electrical circuits
Prior art date
Application number
BR9803352-2A
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 BR9803352A publication Critical patent/BR9803352A/pt

Links

Classifications

    • 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
    • H03F1/26—Modifications of amplifiers to reduce influence of noise generated by amplifying elements
    • 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
    • H03F1/3235—Modifications of amplifiers to reduce non-linear distortion using feed-forward using a loop for error extraction and another loop for error subtraction using a pilot signal
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/66—Amplifiers simultaneously generating oscillations of one frequency and amplifying signals of another frequency
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2201/00—Indexing scheme relating to details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements covered by H03F1/00
    • H03F2201/32—Indexing scheme relating to modifications of amplifiers to reduce non-linear distortion
    • H03F2201/3212—Using a control circuit to adjust amplitude and phase of a signal in a signal path

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Amplifiers (AREA)

Abstract

<B>SISTEMA DE CONTROLE AUTOMáTICO PARA REDUZIR DISTORçãO PRODUZIDA POR CIRCUITOS ELéTRICOS<D> Um sistema de controle automático para reduzir a distorção produzida por circuito elétrico onde um pulso de sinal piloto é aplicado ao circuito elétrico por um período de tempo durante o qual o sistema determina os ajustes a serem realizados em seu circuito, para reduzir a distorção.
BR9803352-2A 1997-07-31 1998-07-14 Sistema de controle automático para reduzir distorção produzida por circuitos elétricos BR9803352A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/903,931 US5847603A (en) 1997-07-31 1997-07-31 Automatic control system for reducing distortion produced by electrical circuits

Publications (1)

Publication Number Publication Date
BR9803352A true BR9803352A (pt) 1999-11-03

Family

ID=25418275

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9803352-2A BR9803352A (pt) 1997-07-31 1998-07-14 Sistema de controle automático para reduzir distorção produzida por circuitos elétricos

Country Status (8)

Country Link
US (1) US5847603A (pt)
EP (1) EP0895349A1 (pt)
JP (1) JPH1197944A (pt)
KR (1) KR100316118B1 (pt)
CN (1) CN1212500A (pt)
BR (1) BR9803352A (pt)
CA (1) CA2238622C (pt)
TW (1) TW396675B (pt)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3106996B2 (ja) * 1997-04-02 2000-11-06 日本電気株式会社 フィードフォワード増幅回路
US6339701B1 (en) 1998-06-17 2002-01-15 Lucent Technologies, Inc. Method and apparatus for extending the dynamic range of a frequency mixer
US6363120B1 (en) 1998-06-17 2002-03-26 Lucent Technologies Inc. Apparatus and method for extending the dynamic range of a mixer using feed forward distortion reduction
US6097324A (en) * 1998-06-17 2000-08-01 Lucent Technologies Inc. Method and apparatus for extending the spurious free dynamic range of an analog-to-digital converter
US6198419B1 (en) 1998-06-17 2001-03-06 Lucent Technologies, Inc. Method and apparatus for extending the spurious free dynamic range of a digital-to-analog converter
US6166600A (en) * 1998-08-31 2000-12-26 Lucent Technologies Inc. Automatic gain and phase controlled feedforward amplifier without pilot signal
US6069531A (en) * 1998-08-31 2000-05-30 Lucent Technologies Inc. Feed forward amplifier improvement incorporating an automatic gain and phase controller
US6052023A (en) * 1998-08-31 2000-04-18 Lucent Technologies Inc. Calibration system for feed forward distortion reduction system
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
US6127889A (en) * 1998-11-18 2000-10-03 Lucent Technologies Inc. Nested feed forward distortion reduction system
US6243038B1 (en) 1998-12-17 2001-06-05 Metawave Communications Corporation System and method providing amplification of narrow band signals with multi-channel amplifiers
US5986499A (en) * 1998-12-21 1999-11-16 Lucent Technologies Inc. Pilot signal detection system using band reject filter
US6392480B1 (en) * 1999-08-19 2002-05-21 Lucent Technologies Inc. Alternating gain and phase control system and method
JP2001339251A (ja) * 2000-05-25 2001-12-07 Mitsubishi Electric Corp フィードフォワード増幅器
US6545487B1 (en) * 2000-08-24 2003-04-08 Lucent Technologies Inc. System and method for producing an amplified signal with reduced distortion
US7340265B2 (en) 2002-02-28 2008-03-04 Atheros Communications, Inc. Method and apparatus for transient frequency distortion compensation
US7123086B2 (en) * 2003-05-07 2006-10-17 Powerwave Technologies, Inc. Feed forward amplifier employing positive feedback pilot generation
US8521090B2 (en) * 2010-01-08 2013-08-27 Samsung Electro-Mechanics Systems, methods, and apparatuses for reducing interference at the front-end of a communications receiving device
CN108123693B (zh) * 2017-12-20 2021-06-15 湖南智领通信科技有限公司 一种提高射频功率放大器效率的自动控制方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4885551A (en) * 1988-10-31 1989-12-05 American Telephone And Telegraph Company At&T Bell Laboratories Feed forward linear amplifier
US5130663A (en) * 1991-04-15 1992-07-14 Motorola, Inc. Feed forward amplifier network with frequency swept pilot tone
JPH07147547A (ja) * 1993-11-24 1995-06-06 Nec Corp フィードフォワード型歪補償回路
JP3320210B2 (ja) * 1994-05-31 2002-09-03 富士通株式会社 初期動作時不要波出力防止型フィードフォワード増幅装置
JP2697625B2 (ja) * 1994-08-31 1998-01-14 日本電気株式会社 フィードフォワード増幅器

Also Published As

Publication number Publication date
TW396675B (en) 2000-07-01
EP0895349A1 (en) 1999-02-03
KR19990014316A (ko) 1999-02-25
CN1212500A (zh) 1999-03-31
KR100316118B1 (ko) 2002-01-15
CA2238622C (en) 2000-10-31
JPH1197944A (ja) 1999-04-09
US5847603A (en) 1998-12-08

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Legal Events

Date Code Title Description
B08F Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]

Free format text: REFERENTE A 3O,4A,5A,6A,7A E 8A ANUIDADES.

B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

Free format text: REFERENTE AO NAO CUMPRIMENTO DO DESPACHO 8.5 NA RPI 1860 DE 29/08/2006.