The low noise high speed amplifier is the key component in any receiver system. In receiver front-end, low noise amplifier plays an important role in GPS applications. This paper presents the comparison of various topologies of Low Noise Amplifier (LNA) depending on performance analysis. Cadence design suite is used for the analysis of various LNA topologies. A 0.18?m CMOS technology is used to design and analyze the LNA topologies. In this, two main LNA topologies namely single ended LNA and inductive source degenerated LNA are designed and by adding the vital features of both topologies, the authors designed LNA for better performance. All LNA's are analyzed for GPS frequency of 1.57GHz.