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Harmonic suppression mixer and tuner

  • US 20090143031A1
  • Filed: 02/04/2009
  • Published: 06/04/2009
  • Est. Priority Date: 03/11/2005
  • Status: Abandoned Application
First Claim
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1. A harmonic suppression mixer, for use in selecting a narrowband signal from a wideband signal, with a radio frequency (RF) input to accept the wideband signal, a local oscillator (LO) input for determining the nanowband signal selection, and complex in-phase (I) and quadrature (Q) outputs comprising:

  • a plurality of switching mixers each with an RF input, an LO input, and an output;

    each switching mixer driven by the RF input signal;

    a plurality of I gain stages, one I gain stage coupled to each switching mixer output;

    a plurality of Q gain stages, one Q gain stage coupled to each switching mixer output;

    each I gain stage output coupled to a first summing node to produce the I output; and

    each Q gain stage output coupled to a second summing node to produce the Q output;

    whereby the I and Q outputs include the selected narrowband signal.

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