Design of Low‐Power and High‐Gain CMOS LNA with Current‐Reused Topology

This article presents the design of low‐power and high‐gain X‐band CMOS low‐noise amplifier (LNA) using a current‐reused (CR) topology. The proposed LNA is equivalent to a three common‐source stage cascade amplifier. With the CR technique, the amplifier is benefit to boost power gain without increasing power dissipation. The CR‐LNA is fabricated by a standard 0.18‐μm CMOS process with a chip size of 0.59 mm. The quiescent current of the circuit is merely 4.2 mA from a power supply of 1.3 V. Measured results demonstrate 20.4‐dB gain, 3.7‐dB noise figure , 11‐dB input return loss, 18‐dB output return loss, −32‐dBm input Pid B , and −18.3‐dBm IIP3 at 10.7 GHz, respectively. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2429–2431, 2013