Topology Comparison and Design of Low Noise Amplifier for Enhanced Gain

Abstract

 This paper presents the comparison of Low Noise Amplifier (LNA) and the design of Common gate as topology and Cascode inductive Source degeneration topology. The Low Noise Amplifier with Common gate as topology and Cascode inductive Source degeneration has been designed for the required noise figure and gain characteristics. The design of LNA is discussed and topologies chosen were simulated using Ansoft Nexxim designer. The design using the Common gate stage achieved a very low gain with a value of 0.86 dB. The LNA with the cascode design of single ended form is then simulated which achieved a higher gain of 24.5 dB. This basic study is used to understand the characteristics of LNA topology under similar conditions.