Design technique of broadband CMOS LNA for DC - 11GHz SDR

IEICE Electronics Express

Ronan Farrell¹  Anh Tuan Phan¹ 

[1] Institute of Microelectronics and Wireless Systems, National University of Ireland

关键词: LNA;    broadband;    software-defined radio;    low power;    CMOS;   

DOI  :  10.1587/elex.7.190

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(8)This paper presents a DC-11GHz CMOS low noise amplifier (LNA) for software-defined radio (SDR). The broadband performance is extended to cover the spectrum from near DC to 11GHz by adopting extra inductors with modified resistive feedback, folded current reuse topology. Bandwidth extension is proposed by inserting pole splitting, interstage and LC ladder inductors. A source follower jointly acts as the buffer stage for broadband output matching and feed-forward path for gain enhancement as well as noise cancellation. Simulation shows power gain of 11 ±4dB and the NF ranging from 1.8 to 3dB in 0.4-11GHz band. The LNA achieves an average IIP3 of -10dBm while consumes only 5.3mW. The proposed broadband LNA is designed in 0.18-µm CMOS process from 1.5V supply.

【 授权许可】

Unknown