A CMOS 3.1-10.6 GHz UWB LNA employing stagger-compensated series peaking

A fully-integrated common-gate UWB LNA employs a stagger-compensated series peaking technique to extend bandwidth, and a capacitor cross-coupled g/sub m/-boosting technique to reduce NF and power. A simple input matching scheme obviates the use of multiple inductors and complex filters. For two versions in 0.18 /spl mu/m CMOS, BW extension factors are 4.1/spl times/ and 4.9/spl times/, -3dB bandwidths are 1.3-10.7 GHz and 1.3-12.3 GHz, NF are 4.4 dB and 4.6 dB, peak S/sub 21/ are 8.5 dB and 8.2 dB, and peak IIP3 are 8.3 dBm and 9.1 dBm, respectively. Each differential LNA draws 2.5 mA from 1.8 V.