Inductorless and cross-coupled wideband LNA with high linearity

摘要

In this paper, the design of a wideband LNA employing simultaneously noise cancellation and a linearisation technique is presented. The designed LNA consists of a cross-coupled common-gate topology for wideband matching and noise cancellation. Also, a linearisation technique is used in order to cancel out third order nonlinearities. The proposed LNA is designed in a 130 nm CMOS technology. It has a simulated gain of 14 dB in the frequency range from 100 MHz to 4.7 GHz. The noise figure (NF) is between 3 dB and 4 dB across this frequency band. The third-order input intercept point IIP3 is simulated to be better than +3.5 dBm. The LNA core consumes 2.4 mW from a 1.2 V supply.