BR9911734A - Método e equipamento para correção de deslocamento cc em conversores digital-para-analógico - Google Patents

Método e equipamento para correção de deslocamento cc em conversores digital-para-analógico

Info

Publication number
BR9911734A
BR9911734A BR9911734-7A BR9911734A BR9911734A BR 9911734 A BR9911734 A BR 9911734A BR 9911734 A BR9911734 A BR 9911734A BR 9911734 A BR9911734 A BR 9911734A
Authority
BR
Brazil
Prior art keywords
signals
digital
analog
offset
transmission signals
Prior art date
Application number
BR9911734-7A
Other languages
English (en)
Inventor
Brett Christopher Walker
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 BR9911734A publication Critical patent/BR9911734A/pt

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/06—Continuously compensating for, or preventing, undesired influence of physical parameters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/38—Angle modulation by converting amplitude modulation to angle modulation
    • H03C3/40—Angle modulation by converting amplitude modulation to angle modulation using two signal paths the outputs of which have a predetermined phase difference and at least one output being amplitude-modulated
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/06—Continuously compensating for, or preventing, undesired influence of physical parameters
    • H03M1/0602—Continuously compensating for, or preventing, undesired influence of physical parameters of deviations from the desired transfer characteristic
    • H03M1/0604—Continuously compensating for, or preventing, undesired influence of physical parameters of deviations from the desired transfer characteristic at one point, i.e. by adjusting a single reference value, e.g. bias or gain error
    • H03M1/0607—Offset or drift compensation
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/06—Continuously compensating for, or preventing, undesired influence of physical parameters
    • H03M1/0617—Continuously compensating for, or preventing, undesired influence of physical parameters characterised by the use of methods or means not specific to a particular type of detrimental influence
    • H03M1/0675—Continuously compensating for, or preventing, undesired influence of physical parameters characterised by the use of methods or means not specific to a particular type of detrimental influence using redundancy
    • H03M1/0678—Continuously compensating for, or preventing, undesired influence of physical parameters characterised by the use of methods or means not specific to a particular type of detrimental influence using redundancy using additional components or elements, e.g. dummy components
    • H03M1/068—Continuously compensating for, or preventing, undesired influence of physical parameters characterised by the use of methods or means not specific to a particular type of detrimental influence using redundancy using additional components or elements, e.g. dummy components the original and additional components or elements being complementary to each other, e.g. CMOS
    • H03M1/0682—Continuously compensating for, or preventing, undesired influence of physical parameters characterised by the use of methods or means not specific to a particular type of detrimental influence using redundancy using additional components or elements, e.g. dummy components the original and additional components or elements being complementary to each other, e.g. CMOS using a differential network structure, i.e. symmetrical with respect to ground
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/66—Digital/analogue converters

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Analogue/Digital Conversion (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Dc Digital Transmission (AREA)
  • Automatic Disk Changers (AREA)

Abstract

"MéTODO E EQUIPAMENTO PARA CORREçãO DE DESLOCAMENTO CC EM CONVERSORES DIGITAL-PARA-ANALóGICO". Um método e equipamento para corrigir de modo adaptável erros de offset ou deslocamento CC impostos sobre sinais em um dispositivo de comunicação. A invenção inclui um circuito de correção de loop de realimentação (122) e um método para medir e reduzir os erros de offset ou deslocamento CC impostos sobre sinais de transmissão analógicos por conversores digital-para-analógico (DACS) de transmissão (102) e filtros analógicos de reconstrução associados. Um loop de realimentação digital é usado para remover erros de offset CC dos sinais de transmissão analógicos antes da transmissão. Em uma modalidade, o loop de realimentação digital inclui um par de conversores analógico para digital, um circuito de correção de offset CC digital (222) e um par de adicionadores (228, 230) . os sinais de transmissão são digitalizados, filtrados e digitalmente processados pelo circuito de correção (222) para gerar sinais de correção de offset que são iguais ao erro de offset CC indesejado presente nos sinais de transmissão. Os sinais de correção são adicionados aos sinais digitais de banda base de entrada desse modo removendo os erros de offset CC indesejados dos sinais de transmissão.
BR9911734-7A 1998-06-30 1999-06-29 Método e equipamento para correção de deslocamento cc em conversores digital-para-analógico BR9911734A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/107,054 US6154158A (en) 1998-06-30 1998-06-30 Digital-to-analog converter D.C. offset correction comparing converter input and output signals
PCT/US1999/014656 WO2000001073A1 (en) 1998-06-30 1999-06-29 Method and apparatus for d.c. offset correction in digital-to-analog converters

Publications (1)

Publication Number Publication Date
BR9911734A true BR9911734A (pt) 2002-04-23

Family

ID=22314600

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9911734-7A BR9911734A (pt) 1998-06-30 1999-06-29 Método e equipamento para correção de deslocamento cc em conversores digital-para-analógico

Country Status (14)

Country Link
US (2) US6154158A (pt)
EP (1) EP1090461B1 (pt)
JP (2) JP4422333B2 (pt)
KR (1) KR100562730B1 (pt)
CN (1) CN1183678C (pt)
AT (1) ATE313169T1 (pt)
AU (1) AU759884B2 (pt)
BR (1) BR9911734A (pt)
CA (1) CA2334999A1 (pt)
DE (1) DE69928934T2 (pt)
ES (1) ES2258334T3 (pt)
HK (1) HK1036530A1 (pt)
ID (1) ID28175A (pt)
WO (1) WO2000001073A1 (pt)

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Also Published As

Publication number Publication date
KR100562730B1 (ko) 2006-03-20
DE69928934T2 (de) 2006-08-24
ID28175A (id) 2001-05-10
HK1036530A1 (en) 2002-01-04
CN1307749A (zh) 2001-08-08
DE69928934D1 (de) 2006-01-19
AU4726199A (en) 2000-01-17
WO2000001073A1 (en) 2000-01-06
KR20010053265A (ko) 2001-06-25
ES2258334T3 (es) 2006-08-16
JP2010045792A (ja) 2010-02-25
JP4589443B2 (ja) 2010-12-01
JP2002519925A (ja) 2002-07-02
EP1090461A1 (en) 2001-04-11
US6278391B1 (en) 2001-08-21
JP4422333B2 (ja) 2010-02-24
CA2334999A1 (en) 2000-01-06
EP1090461B1 (en) 2005-12-14
ATE313169T1 (de) 2005-12-15
CN1183678C (zh) 2005-01-05
US6154158A (en) 2000-11-28
AU759884B2 (en) 2003-05-01

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