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Direct conversion receiver

  • US 7,856,218 B2
  • Filed: 03/20/2007
  • Issued: 12/21/2010
  • Est. Priority Date: 12/20/2002
  • Status: Active Grant
First Claim
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1. A direct conversion receiver comprising:

  • a pair of mixers which convert a receive signal frequency to a baseband frequency; and

    a baseband frequency signal processing block including a pair of first gain control amplifiers and a pair of first filters, following said mixers,wherein said baseband frequency signal processing block further includes a pair of negative feedback circuits with an adjustable feedback factor, each negative feedback circuit comprising a second gain control amplifier connected to a respective first gain control amplifier of the pair of first gain control amplifiers and a second filter of low-pass type connected to the gain control second amplifier, andwherein the second filter of each negative feedback control circuit is configured to adjust to optimize frequency characteristics and suppress degradation in a signal.

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