Summary
International Symposium on Antennas and Propagation
2010
Session Number:3TF2
Session:
Number:3TF2-4
Design of a low power UWB CMOS LNA for UWB system
Yohan Jang, Nackgyun Sung, Jaehoon Choi,
pp.-
Publication Date:2010/11/23
Online ISSN:2188-5079
Summary:
Ultra Wideband (UWB) system has become an increasingly popular technology which is a wireless technology capable of transmitting data over the wide spectrum of frequency band with very low power and high data rates [1]. For a wideband application such as UWB system, wideband input matching and sufficient gain over the entire bandwidth are important. UWB systems are under development to satisfy such demands by adopting various advanced technologies. CMOS technology is one of the key technologies not only to provide high performance but also to reduce manufacturing cost. Low noise amplifier (LNA) is one of the most critical devices in the UWB receivers since the noise figure is a dominant figure of merit in the first stage of the receiver. In addition, it should have characteristics of low power consumption, low return loss and high gain over the entire frequency band of interest. In this paper, we propose a low power current reuse CMOS LNA to increase the transconductance of the LNA without increasing the power dissipation, unlike other technologies [2-4]. To reduce the power consumption and to achieve wideband gain performance, an inverter stage with current reuse technique is stacked on the top of a common source amplifier.