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Dynamic, low if, image interference avoidance receiver

  • US 20080051053A1
  • Filed: 08/24/2006
  • Published: 02/28/2008
  • Est. Priority Date: 08/24/2006
  • Status: Abandoned Application
First Claim
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1. A dynamic, low IF, image interference avoidance receiver comprising:

  • a programmable local oscillator for producing a local oscillator frequency;

    a mixer responsive to said local oscillator frequency and an input signal frequency to provide an intermediate signal frequency which is the sum or difference between said local oscillator frequency and said input signal frequency;

    a tracking programmable band pass filter responsive to said intermediate signal frequency to produce a filtered intermediate signal;

    a detector responsive to said filtered intermediate signal for determining the presence of interference; and

    a controller responsive to said detector determining the presence of interference for shifting both the local oscillator frequency of said programmable local oscillator and the center frequency of said tracking programmable band pass filter to maintain the intermediate signal frequency centered on the center frequency of said tracking programmable bandpass filter.

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