0.4 mW wideband LNA with double <i>g</i> _m enhancement and feed‐forward noise cancellation

Abstract

A low‐power wideband common‐gate (CG) low‐noise amplifier (LNA) presented. The CG LNA uses double g m enhancement to provide input matching under low‐power consumption. Feed‐forward noise cancellation (FFNC) is employed in the LNA to suppress the noise from the CG transistor. The LNA is designed and fabricated in TSMC 130‐nm CMOS technology. This LNA can achieve a maximum gain of 14 dB with a 3 dB bandwidth from 350 to 950 MHz. The LNA consumes 0.5 mA current under a 0.8‐V supply. The average noise figure of the LNA is 4.0 dB. The core area of the LNA is 0.06 mm 2 .