0.9 V Body-Biased LNA with Input Matching for Enhanced Gain & Low Power Applications

Abstract

In this paper, a 2.4 GHz Low Noise Amplifier (LNA) at 180nm CMOS technology is presented. This LNA design involves two stages, the common source cascade, and the cascode stage. The proposed circuit improves the noise figure (NF) and power gain (S 21 ) of LNA by utilizing the cumulative effect of the input matching network and body bias technique. The work is implemented using the tool “Advanced Design System” (ADS). The simulation results show a power gain (S 21 ) of 26.925 dB and a noise figure of 1.505. The other scattering parameters are also observed with input return loss (S 11 ) of-11.989 dB, output return loss (S 22 ) of −10.397 dB, and reverse isolation (S 12 ) of −53.030 dB. With the help of the body bias technique, the power supply of the circuit is also reduced to 0.9V which leads to the power consumption of as low as 2.507 mW.