A 1.0 V, 2.5 mW, transformer noise-canceling UWB CMOS LNA

Abstract

We present a transformer noise-canceling ultra-wideband (UWB) CMOS LNA based on a common-gate topology. A transformer, composed of an input inductor and shunt peaking inductor, partly cancels the noise originating from a common-gate transistor. The combination of the transformer with an output series inductor provides wideband input impedance matching. The LNA, implemented with 90-nm digital CMOS technology occupies 0.10 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> and achieves S <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">11</inf> ≪ −10 dB, NF ≪ 3.3 dB, and S <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">21</inf> ≫ 7.8 dB across 3.1–10.6 GHz with a power consumption of 2.5 mW from a 1.0-V supply. These results show that the proposed topology is the most suitable for low-power and low-voltage UWB CMOS LNAs.