Patent ID: 7113755

Claim:
A mixer circuit comprising: a first mixer stage comprising a first transmission gate and a second transmission gate, wherein the first transmission gate includes complementary transistors and is coupled with a first mixed signal terminal and first and second local oscillator (LO) signal terminals, and the second transmission gate includes complementary transistors and is coupled with a second mixed signal terminal and the first and second LO signal terminals; a second mixer stage comprising a third transmission gate and a fourth transmission gate, wherein the third transmission gate includes complementary transistors and is coupled, with the first transmission gate, the first mixed signal terminal and the first and second LO signal terminals so as to operate out of phase with the first transmission gate, and the fourth transmission gate includes complementary transistors and is coupled with the third transmission gate, the second mixed signal terminal and the first and second LO signal terminals so as to operate out of phase with the second transmission gate; a first base band signal terminal coupled with the first and second transmission gates; and a second base band signal terminal coupled with the third and fourth transmission gates; wherein the mixer circuit processes signals so as to provide for at least one of: mixing a first base band signal communicated to the first and second base band signal terminals with a differential LO signal communicated to the first and second LO signal terminals to create a first mixed signal; and extracting a second base band signal from a second mixed signal communicated to the first and second mixed signal terminals using the LO signal communicated to the first and second LO signal terminals.