A 2.5dB Noise Figure 28GHz Current-Reused Noise-Cancelling LNA with g_m-Boosting in 65nm CMOS for Millimeter-Wave MIMO Applications

Abstract

A 28GHz noise-cancelling low noise amplifier (LNA) in standard 65nm CMOS technology is introduced for millimeter-wave application in this letter. The proposed LNA implements transformer-based noise-cancelling technique to cancel the in-phase noise from main and auxiliary amplifier while strengthening the combined signal. A gain-boosting transformer is employed to improve gain with minimized power consumption. Current-reuse technique is further introduced to reduce power consumption overhead. This work achieves a gain of 27dB and a minimum noise figure (NF) of 2.5dB with only 4.4-mW LNA stage power consumption.