Ultra-wideband low noise amplifier employing noise cancelling and simultaneous input and noise matching technique

Abstract

An ultra-wideband (UWB) low-noise amplifier (LNA) exploiting noise cancelling and simultaneous input and noise matching (SINM) technique is presented. The common-gate (CG) input stage with noise cancellation topology is utilized for low-noise figure and wideband input matching. To overcome the noise deterioration induced by the noise-cancelling stages and broaden the input-matching bandwidth, simultaneous input and noise matching technique is employed. The circuit is fabricated in 180-nm CMOS technology. The measurement results show that within 3.1–10.6 GHz UWB applications, S₁₁ is lower than −10 dB, the gain (S₂₁) is 12.4–13.6 dB and the noise figure (NF) is 3.3–4.5 dB. It consumes 12 mA under a 1.8 V supply and occupies an area of 0.56 mm².