This paper presents a broadband CMOS differential low-noise amplifier (LNA) for the 3 − 5GHz band of UWB applications. It uses a feedforward noise cancellation technique and a local resistive feedback to improve the input matching. Postlayout simulation shows a noise figure in a range of 2.78−3.2 dB, a maximum power gain of 17dB and a return loss greater than 10dB. the proposed design consumes 19.4mW with the output buffer under 1-V supply voltage in the 0.18μm CMOS technology.