BR9912735A - Circuito de controle automático de ganho para controlar múltiplos estágios de amplificador de ganho variável enquanto estima a potência do sinal recebido - Google Patents

Circuito de controle automático de ganho para controlar múltiplos estágios de amplificador de ganho variável enquanto estima a potência do sinal recebido

Info

Publication number
BR9912735A
BR9912735A BR9912735-0A BR9912735A BR9912735A BR 9912735 A BR9912735 A BR 9912735A BR 9912735 A BR9912735 A BR 9912735A BR 9912735 A BR9912735 A BR 9912735A
Authority
BR
Brazil
Prior art keywords
control circuit
amplifier
gain
received signal
signal strength
Prior art date
Application number
BR9912735-0A
Other languages
English (en)
Inventor
Peter J Black
Original Assignee
Qualcomm 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 Qualcomm Inc filed Critical Qualcomm Inc
Publication of BR9912735A publication Critical patent/BR9912735A/pt

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
    • H03G3/3078—Circuits generating control signals for digitally modulated signals
    • 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
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/109—Means associated with receiver for limiting or suppressing noise or interference by improving strong signal performance of the receiver when strong unwanted signals are present at the receiver input
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/294—Indexing scheme relating to amplifiers the amplifier being a low noise amplifier [LNA]

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

"CIRCUITO DE CONTROLE AUTOMáTICO DE GANHO PARA CONTROLAR MúLTIPLOS ESTáGIOS DE AMPLIFICADOR DE GANHO VARIáVEL ENQUANTO ESTIMA A POTêNCIA DO SINAL RECEBIDO". A presente invenção consiste de um circuito de AGC novo e aperfeiçoado que pode ser genericamente configurado para acomodar uma diversidade de configurações de amplificadores de AGC para melhorar o desempenho IP3 e reduzir a corrente requerida de amplificador, provendo concomitantemente uma estimativa da potência recebida que permanece válida independentemente de como o ganho ou a atenuação são distribuídos entre os vários amplificadores. Um circuito de controle genérico mantém tal estimativa de potência em um único valor de amplificação de ganho total pela distribuição de ganho a pelo menos dois estágios de amplificador em resposta a tal valor. Pela programação ou codificação rígida (hard coding) de alguns parâmetros chave, um circuito de controle genérico pode controlar uma ampla diversidade de configurações de amplificador.
BR9912735-0A 1998-08-06 1999-08-06 Circuito de controle automático de ganho para controlar múltiplos estágios de amplificador de ganho variável enquanto estima a potência do sinal recebido BR9912735A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/130,393 US6107878A (en) 1998-08-06 1998-08-06 Automatic gain control circuit for controlling multiple variable gain amplifier stages while estimating received signal power
PCT/US1999/017836 WO2000008751A1 (en) 1998-08-06 1999-08-06 Automatic gain control circuit for controlling multiple variable gain amplifier stages while estimating received signal power

Publications (1)

Publication Number Publication Date
BR9912735A true BR9912735A (pt) 2005-02-09

Family

ID=22444497

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9912735-0A BR9912735A (pt) 1998-08-06 1999-08-06 Circuito de controle automático de ganho para controlar múltiplos estágios de amplificador de ganho variável enquanto estima a potência do sinal recebido

Country Status (11)

Country Link
US (2) US6107878A (pt)
EP (1) EP1101281A1 (pt)
JP (1) JP2003505894A (pt)
KR (1) KR20010072302A (pt)
CN (1) CN1158755C (pt)
AU (1) AU761548B2 (pt)
BR (1) BR9912735A (pt)
CA (1) CA2339655A1 (pt)
ID (1) ID29613A (pt)
RU (1) RU2212093C2 (pt)
WO (1) WO2000008751A1 (pt)

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Also Published As

Publication number Publication date
KR20010072302A (ko) 2001-07-31
HK1038446A1 (en) 2002-03-15
ID29613A (id) 2001-09-06
EP1101281A1 (en) 2001-05-23
CN1321357A (zh) 2001-11-07
AU761548B2 (en) 2003-06-05
CN1158755C (zh) 2004-07-21
RU2212093C2 (ru) 2003-09-10
JP2003505894A (ja) 2003-02-12
WO2000008751A1 (en) 2000-02-17
CA2339655A1 (en) 2000-02-17
US6181201B1 (en) 2001-01-30
AU5393599A (en) 2000-02-28
US6107878A (en) 2000-08-22

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