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Direct conversion receiver architecture

  • US 20110105070A1
  • Filed: 03/14/2006
  • Published: 05/05/2011
  • Est. Priority Date: 02/16/2001
  • Status: Active Grant
First Claim
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1. An automatic gain control (AGC) apparatus operable during direct conversion of RF signals comprising:

  • an analog variable gain amplifier;

    a digital variable gain amplifier coupled to an output of the analog variable gain amplifier;

    a gain controller adapted to measure a signal strength and to control the gains of the analog and digital variable gain amplifiers; and

    a DC offset canceller interposed between the output of the analog variable gain amplifier and an input of the digital variable gain amplifier.

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