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Performance Comparison of Various Low Noise-High Speed Amplifier Topologies for GPS Applications

Author : Pranav C Pattewar and K.B.Khanchandani

Pages : 426-429
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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 LNA depending on performance analysis. Cadence design suite is used for the analysis of various LNA topologies. A 0.18μm CMOS technology is used to design and analyse 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, we designed LNA for better performance. All LNA’s are analysed for GPS frequency of 1.57GHz. The LNAs are compared for performance analysis using several parameters like noise figure, S- parameters and gain. In this paper, we compared the topologies with circuit diagram and the parameters mainly noise figure.

Keywords: LNA (Low Noise Amplifier), CMOS, GPS, Noise Figure.

Article published in International Journal of Current  Engineering  and Technology, Vol.4,No.1 (Feb- 2014)




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