2.4-5.8 GHz CMOS LNA's using integrated inductors

Abstract

Three 2-3 V-supply LNA's were designed in 0.35 /spl mu/m and 0.25 /spl mu/m digital CMOS processes, for center frequencies of 2.4, 3, and 5.8 GHz. The circuits' components are fully-integrated making them suitable for integration into a complete transceiver. The measured forward transmissions S21 for the 2.4 and 3 GHz LNA's are 6.5 and 8 dB respectively, at relatively low power consumption of 20 mW, when excluding the output stages. The noise figures achieved are 2.5 and 3 dB respectively. Simulation of the 5.8 GHz LNA yielded 10 dB of forward gain and 3 dB of noise figure, at 20 mW of power consumption.