Series peaked noise matched gm-boosted 3.1-10.6 GHz CG CMOS differential LNA for UWB WiMedia

A low-power noise-matched fully-differential common-gate (CG) low-noise amplifier (LNA) is presented for ultra-wideband (UWB) operating in the 3.1-10.6 GHz band. Performance was optimised by employing the transconductance ´g_m´-boosted CG LNA topology with series peaking along with an input noise matching network. A common source g_m-boosting amplifier, in conjunction with an LC T-network, was used to share the bias current with the CG stage. The LNA was demonstrated using 130 nm CMOS process and consumed 7 mW from a 1 V supply. It exhibited an input return loss (S₁₁) and an output return loss (S₂₂) of -10.5 dB and -14 dB, respectively. Also, it achieved a forward power gain (S₂₁) of 14.5 dB and a noise figure between 4.5 and 5.0 dB.