A 1-GHz CMOS up-conversion mixer

A high-frequency linear MOS mixer topology is presented for the implementation of a 1-GHz up-conversion mixer in a standard 0.7-/spl mu/m CMOS technology. The high output bandwidth has been achieved by the development of an nMOS-only current amplifier that converts the modulated current of the nMOS mixing transistor biased in the linear region to the RF output voltage.