Wideband Reconfigurable Capacitive Shunt-Feedback LNA in 65nm CMOS

摘要

A differential LNA using capacitive shunt feedback is demonstrated in 65 nm CMOS. The capacitive shunt feedback structure gives a wideband input matching, Sll <-17dB from 500 MHz - 1GHz for low band and S11 <-20dB from 1.1 GHz - 2.3 GHz for high band. The NF for the complete receiver chain in low band and high band was measured to 3.3 dB and 3.9 dB, respectively. The 1-dB compression point with a OdBm blocker present at 20 MHz offset is OdBm and the NF_(dsb) with OdBm blocker is 13dB. In-band IIP3, and IIP2 are -14.8 dBm, and > 49dBm, respectively for low band and -18.2 dBm and >44 dBm for high band.