Design of Linearity Improved Low Noise Amplifier using Derivative Superposition

This paper proposes different implementation of derivative superposition technique to improve the linearity of “Low Noise Amplifier” used in the receiver part of communication system. Derivative superposition is proved to be the promising technique for the improvement of linearity of LNA. This paper introduces the DS techniques in different forms by varying W, L or VGS to achieve higher IIP3. Also the results in the implementations are compared to other existing methods. The proposed scheme just not only provides high IIP3 values but it remains stable for a large variations in VGS, which is not the case with other existing techniques