Low Noise Amplifier Design in RF System

This course covers the comprehensive process of designing low noise amplifiers (LNAs) in RF transceiver design. It starts with the basic concept of LNAs and the importance of input referred noise. The course then delves into the transformation of a noisy two-port network into a noiseless one by adding voltage sources. It further explains how to derive the noise factor and the short circuit current. The course also discusses the correlation between noise voltage and noise current, and how to minimize the noise factor. It concludes with a practical example of designing a low noise amplifier at 4 GHz using given S parameters. The course also covers different amplifier topologies, including common source and common gate topologies, and their respective noise figures. It concludes with an explanation of how to reduce noise figures and achieve optimum noise performance. This course has been developed by Prof. Darshak Bhatt from IIT Roorkee for NPTEL. It is now accessible through Ansys Innovation Space courtesy of the partnership between Ansys and NPTEL, under the CC BY-SA license. For more details, visit https://nptel.ac.in/courses/108107379.