A new highly linear CMOS mixer suitable for deep submicron technologies

Abstract

In this paper, a new highly linear high-frequency CMOS mixer is presented. The new mixer is derived from the basic Gilbert multiplier. It achieves an outstanding linearity since the new topology does not contain any tail current branches. Simulation of the extracted layout results show a high linearity improvement over the basic Gilbert mixer, with HP3 of 31 dBm in 0.8 /spl mu/m and 20 dBm in 0.18 /spl mu/m. The new mixer's test chip layout and its extracted simulation characteristics in both technologies are also presented.