A low-voltage, low-power bulk-driven mixer using 0.18 ?m CMOS technology

A low voltage, low power CMOS down-conversion mixer is presented for Ultra-wideband (UWB) systems. The proposed mixer is designed for a 3.35 GHz input RF signal and 250 MHz output IF signal in 0.18pm CMOS technology and simulated using Advanced design system (ADS) software. The proposed mixer is based on the conventional Gilbert cell architecture with bulk driven technique. Two element LC matching topology is used at the LO switching stage to improve the performance of the mixer. The proposed mixer exhibits maximum conversion gain of 7.10 dB, double sideband noise figure (DSB NF) of 2.5 dB, HP3 of -2.2 dBm, 1 dB gain compression point of -20.6 dBm. The power consumed by the circuit is 0.195 mW at a DC supply of 1V.