A 2.4 GHz Ultra-Low-Power Current-Reuse CG-LNA With Active ${rm G}_{rm m}$ -Boosting Technique

摘要

An ultra-low-power common-gate low noise amplifier (CG-LNA) for 2.4 GHz wireless sensor network (WSN) applications is proposed in this letter. The current-reuse and active $g_{rm m}$-boosting techniques are utilized. The analysis, design method and measurement results are shown. An implemented prototype using 0.18 $mu$m CMOS technology is evaluated using on-wafer probing. Measurements also show a gain of 14.7 dB and an ${rm IIP}_{3}$ of 2 dBm at 2.44 GHz. The measured noise figure is 4.8 dB at 2.44 GHz. ${rm S}_{11}$ is below ${-}18$ dB from 2–3 GHz. The proposed LNA consumes 0.58 mW from 1.8 V dc supply.