A high-frequency linear MOS mixer topology is presented for the implem
entation of a 1-GHz up-conversion mixer in a standard 0.7-mu m CMOS te
chnology, The high output bandwidth has been achieved by the developme
nt of an nMOS-only current amplifier that converts the modulated curre
nt of the nMOS mixing transistor biased in the linear region to the RF
output voltage.