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Direct conversion radio receiver using combined down-converting and energy spreading mixing signal

  • US 6,445,726 B1
  • Filed: 04/30/1999
  • Issued: 09/03/2002
  • Est. Priority Date: 04/30/1999
  • Status: Active Grant
First Claim
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1. A receiver, comprising:

  • an input for receiving an RF signal centered at a first frequency and having a bandwidth;

    a first mixer for producing a first output signal by mixing the RF signal with a signal having an energy spreading portion and a down-converting portion, wherein the first output signal comprises a self-mixing DC signal and a down-converted and energy spread RF signal; and

    a second mixer for producing a second output signal by mixing a signal responsive to the first output signal with the energy spreading portion of the signal, such that the second output signal comprises;

    a baseband signal responsive to the down-converted; and

    an energy spread RF signal and a spread DC signal responsive to the self-mixing DC signal.

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