A low voltage dual gate integrated CMOS mixer for 2.4GHz band applications

A new topology for a low voltage dual gate mixer for 2.4GHz band applications was implemented in 0.35/spl mu/m CMOS technology. With resistive degeneration, and implemented with MOS transistors in the linear region, this topology proves to be suitable for down-converters requiring low-voltage and high linearity. With a RF input of 2.4GHz and an IF output of 100MHz, the mixer has a voltage conversion gain of 9.48dB with a 50/spl Omega/ output load, an input-referred third-order intercept point of +3dBm, and noise figure of 17.69dB while requiring -5dBm of LO power and consuming 4.7mA from a 2V supply. Though the mixer design was implemented in 0.35/spl mu/m CMOS process in this project, with the device scaling down, the design idea could be implemented in other sub-micron technologies, which could provide good performance with lower supply voltages.