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By-passing adjacent channel interference removal in receivers

  • US 20040018824A1
  • Filed: 07/26/2002
  • Published: 01/29/2004
  • Est. Priority Date: 07/26/2002
  • Status: Active Grant
First Claim
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1. A heterodyne receiver comprising:

  • a tuner configured to select a frequency of a received signal;

    a converter, coupled to an output of the tuner, for changing the frequency of the received signal to an intermediate frequency;

    a single-pole/double throw switch having an input coupled to an output of the converter;

    a first band-pass filter coupled to a first output of the single-pole/double throw switch;

    an amplifier coupled to a second output of the single-pole/double throw switch and the first band-pass filter;

    a second band-pass filter coupled to an output of the amplifier;

    a demodulator coupled to an output of the second band-pass filter to produce an output signal and a characteristics signal; and

    a logic circuit coupled to receive the characteristics signal and by-passing the first band-pass filter if the characteristics signal is less than a predetermined threshold.

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