An ultra-wideband (UWB) low-noise amplifier (LNA) using a 0.11 µm CMOS technology is proposed. The commongate (CG) input stage for wideband input impedance matching and the common-source (CS) stage for noise cancelling are applied. In the proposed LNA, the current of the CG input stage can be significantly reduced by applying the g m-boosting technique using the noise-cancelling CS stage without additional amplifier, and the noise performance can be improved at the same power consumption. For low-power operation, the LNA consumes 2.9 mW and achieves a noise figure (NF) of S 21
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