A novel IP3 boosting technique using feedforward distortion cancellation method for 5 GHz CMOS LNA

Low noise amplifier (LNA) in many wireless and wireline communication systems must have low noise, sufficient gain and high linearity performance. This paper presents a novel IP3 boosting technique using Feedforward Distortion Cancellation (FDC) method. Through this technique, the IIP3 of LNA can be boosted from +5 dBm, which is reported in most public literature to date, to +21 dBm, which is firstly reported here, without any noise and gain degradation. In addition, noise figure can be reduced about 0.4 dB and gain increased 0.4 dB due to the additional gain path.