ZA95605B - Method and apparatus for automatic gain control and dc offset cancellation in quadrature receiver - Google Patents

Method and apparatus for automatic gain control and dc offset cancellation in quadrature receiver

Info

Publication number
ZA95605B
ZA95605B ZA95605A ZA95605A ZA95605B ZA 95605 B ZA95605 B ZA 95605B ZA 95605 A ZA95605 A ZA 95605A ZA 95605 A ZA95605 A ZA 95605A ZA 95605 B ZA95605 B ZA 95605B
Authority
ZA
South Africa
Prior art keywords
signal
gain control
baseband
received
output
Prior art date
Application number
ZA95605A
Other languages
English (en)
Inventor
Nathaniel B Wilson
Peter J Black
Paul E Peterzell
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=22887009&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ZA95605(B) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Publication of ZA95605B publication Critical patent/ZA95605B/xx

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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/16—Multiple-frequency-changing
    • H03D7/165—Multiple-frequency-changing at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/001—Details of arrangements applicable to more than one type of frequency demodulator
    • H03D3/002—Modifications of demodulators to reduce interference by undesired signals
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/007—Demodulation of angle-, frequency- or phase- modulated oscillations by converting the oscillations into two quadrature related signals
    • H03D3/008—Compensating DC offsets
    • 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
    • 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
    • H03G3/3089—Control of digital or coded signals
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
    • H03D2200/0001—Circuit elements of demodulators
    • H03D2200/0025—Gain control circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
    • H03D2200/0041—Functional aspects of demodulators
    • H03D2200/0047—Offset of DC voltage or frequency
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
    • H03D2200/0041—Functional aspects of demodulators
    • H03D2200/005—Analog to digital conversion
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
    • H03D2200/0041—Functional aspects of demodulators
    • H03D2200/0052—Digital to analog conversion

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Circuits Of Receivers In General (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Noise Elimination (AREA)
ZA95605A 1994-04-28 1995-01-25 Method and apparatus for automatic gain control and dc offset cancellation in quadrature receiver ZA95605B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US23581294A 1994-04-28 1994-04-28

Publications (1)

Publication Number Publication Date
ZA95605B true ZA95605B (en) 1995-12-20

Family

ID=22887009

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA95605A ZA95605B (en) 1994-04-28 1995-01-25 Method and apparatus for automatic gain control and dc offset cancellation in quadrature receiver

Country Status (20)

Country Link
US (1) US5617060A (ja)
EP (1) EP0706730B1 (ja)
JP (1) JP3021662B2 (ja)
KR (1) KR100329673B1 (ja)
CN (1) CN1068471C (ja)
AT (1) ATE164974T1 (ja)
AU (1) AU694514B2 (ja)
BR (1) BR9506205A (ja)
CA (1) CA2163883C (ja)
DE (1) DE69501996T2 (ja)
DK (1) DK0706730T3 (ja)
ES (1) ES2115380T3 (ja)
FI (1) FI112740B (ja)
HK (1) HK1005920A1 (ja)
IL (1) IL113479A (ja)
MY (1) MY113706A (ja)
RU (2) RU2156538C2 (ja)
TW (1) TW283277B (ja)
WO (1) WO1995030275A1 (ja)
ZA (1) ZA95605B (ja)

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CA2163883A1 (en) 1995-11-09
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TW283277B (ja) 1996-08-11
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ATE164974T1 (de) 1998-04-15
AU694514B2 (en) 1998-07-23
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RU2156538C2 (ru) 2000-09-20
US5617060A (en) 1997-04-01
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DE69501996D1 (de) 1998-05-14
FI956286A (fi) 1996-02-26
EP0706730A1 (en) 1996-04-17
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RU2241304C2 (ru) 2004-11-27
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IL113479A (en) 1999-07-14
FI112740B (fi) 2003-12-31
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CA2163883C (en) 2003-01-28
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CN1128091A (zh) 1996-07-31
CN1068471C (zh) 2001-07-11

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