Design and Study of 90nm CMOS Common Source 2.4GHz Low Noise Amplifier

Abstract

A systematic and meticulous study on different topologies of Common source Low noise amplifiers for low power applications is designed at 2.4 GHz for low power wireless applications. The design and analysis of Common Source Inductive load (Type 1), Inductive Source Degeneration (Type 2) and Cascode Common Source LNA (Type 3) is accomplished using cadence virtuoso analog and digital design environment in 90 nm cmos technology. The proposed LNA implemented using a common source with inductive degeneration achieves a gain of 25.1783dB. Also, Input Reflection Coefficient (S 11) of -1.826dB, Output Reflection Coefficient (S22) of 2.17861dB, Reverse Gain Coefficient (S 12) of -31.6649dB, and noise figure of 1.382dB is recorded which emphasizes the efficiency of proposed LNA in efficiently managing the trade off between noise figure and gain. Also, the other two topologies recorded a gain of 5 to 8 dB and noise figure of 3 dB. Further optimization with respect to these topologies was accompanied by the degrading performance in terms of low gain and high noise figure.