A 1-13GHz CMOS low-noise amplifier using compact transformer-based inter-stage networks

An ultra-wideband low noise amplifier (LNA) is presented in 65 nm CMOS. In order to obtain ultra-wide bandwidth, a compact inter-stage network utilizing one transformer and a de-Q-ing resistor is presented. The proposed LNA achieves maximum power gain of 18.21 dB over an ultrawideband of 1-13 GHz, the measured minimum noise figure (NF) of 5.28 dB and an input 1-dB compression point (IP_1dB) of -21.43 dBm. The implemented LNA occupies 0.52mm² of the active area excluding pads, and it draws 14.92mW from 1.2V power supply.