Patent ID: 8285240

Claim:
A quadrature mixer comprising: a polyphase filter adapted to generate a plurality of phases of an input signal; a plurality of harmonic reject mixers, each harmonic reject mixer having a first input receiving one of the plurality of phases of the input signal, and a second input receiving one of a plurality of phases of a local oscillator (LO) signal, wherein each harmonic reject mixer comprises: at least one phase shifter receiving the LO signal received by the harmonic reject mixer in which the at least one phase shifter is disposed, said at least one phase shifter generating a plurality of phase shifted LO signals; a plurality of switching mixers each receiving the phase of the input signal received by the harmonic reject mixer in which the switching mixer is disposed, each switching mixer further receiving a different one of the plurality of phase shifted LO signals associated therewith, each switching mixer generating an output signal in response to the signals the switching mixer receives; and a combiner adapted to combine the plurality of output signals of the plurality of switching mixers to generate an output associated with the harmonic reject mixer; a first combiner adapted to combine outputs of a first subset of the plurality of harmonic reject mixers to generate a quadrature output signal associated with the quadrature mixer; and a second combiner adapted to combine outputs of a second subset of the plurality of harmonic reject mixers to generated an in-phase output signal associated with the quadrature mixer.