A dual mode 2.4-GHz CMOS low noise amplifier employing body biasing

This paper presents a dual mode CMOS low noise amplifier (LNA) suitable for WiMAX (Worldwide Interoperability for Microwave Access) applications, 2.4 GHz. The design concept is based on the novel idea of body. Measurement results show that in the high gain mode, for V_BS=0.3 V, the cascode LNA, implemented in a 0.13 ¿m CMOS standard process, exhibits a 14 dB power gain, a 3.6 dB noise figure (NF) and -4.6 dBm of third order intercept point (IIP3) for a 4 mA current consumption under 1 V supply. Tuning VBS to -0.55 V, switches the LNA into the low gain mode. It achieves 9 dB power gain, 6.2 dB NF and 11 dBm IIP3 under a constrained power consumption of 2 mW.