A duplex current-reused CMOS LNA with complementary derivative superposition technique

Summary A duplex current-reused complementary metal–oxide–semiconductor low-noise amplifier (LNA) is proposed for 2.5-GHz application. The duplex current-reused topology with equivalent three common-source gain stages cascaded is utilized to fulfil the low-power consumption and high gain simultaneously. The complementary derivative superposition linearization technique with bulk-bias control is employed to improve the linearity performance with large-signal swing and to extend the auxiliary transistors bias-control range. The proposed LNA is fabricated in a 0.18-um 1P5M complementary metal–oxide–semiconductor process and consumes a 3.13-mA quiescent current from a 1.5 V voltage supply. The measurement results show that the proposed LNA achieves power gain of 28.1 dB, noise figure of 1.64 dB, input P1dB and IIP3 of −19.6 dBm and 3.2 dBm, respectively, while the input and output return loss is 19.2 dB and 18.4 dB. Copyright © 2016 John Wiley & Sons, Ltd.