A low-power 2.4-GHz receiver front-end with a complementary series feedback LNA and a current-reused passive down-converter based on gm-boosted TIA for WSN applications

Abstract

This letter proposes a 2.4-GHz low power WSN RF front-end with high conversion gain and low noise figure. The proposed complementary series feedback low-noise amplifier (LNA) achieves high voltage gain and low NF with low power consumption. In the passive down-converter, a g_m-boosted TIA employing local g_m-boosted feedback structure is proposed to improve the power efficiency. Fabricated in TSMC 55-nm CMOS technology, the proposed front-end achieves a measured conversion gain of 38 dB, a noise figure of 2.75dB at 2.4 GHz with the power consumption of 2.9mW under 1V power supply voltage and the chip area of 0.63mm×0.43mm.