This paper presents broad band low noise amplifier for WLAN applications featuring both low noise, high linearity and low dc power consumption. Low noise figure lower than 2 dB has been obtained with IIP3 of -9 dBm and power gain larger than 20 dB using an original bias technique. Another issue has been investigated concerning LNA having very low power consumption. We have obtained a Pdc of 9 mW with 2.5 dB noise figure 17 dB gain and IIP3 of -6.2 dBm. (C) 2003 Elsevier B.V. All rights reserved.