Forward Body Biasing Technique in Current Folded CMOS LNA in Subthreshold Region for Biomedical Applications

A CMOS low noise amplifier with current folded technique has been proposed for ultra-low voltage, ultra-low power biomedical applications. The target frequency is 2.4 GHz and the proposed LNA is implemented in standard 65 and 90 nm CMOS technologies. By exploiting forward body biasing technique in current folded architecture, the LNA is biased in subthreshold region with supply voltage of 350 m V and DC current consumption of 503 uA. The LNA achieves power gain S21 of 10 dB, noise figure NF of 1.7 dB, IIP3 and P1dB of -8 dB, -18 dB respectively.