题目/Title：Process variation compensation of a 2.4GHz LNA in 0.18um CMOS using digitally switchable capacitance

作者/Author：
                        Yike Cui,Baoyong Chi,Minjie Liu,Yulei Zhang,Yongmin Li,Zhihua Wang,Chiang Patrick

会议/Conference：ISCAS 2007

地点/Location：New Orleans, LA

年份/Issue Date：2007.27-30 May

页码/pages：pp. 2562 - 2565

摘要/Abstract：
A 0.18um CMOS 2.4GHz LNA (Low Noise Amplifier) with digitally switchable capacitance has been designed to investigate its ability to compensate for performance variation across worst case process conditions. The effects of transistor model and passive component variation are first simulated to quantify the range of performance uncertainty. The use of various methods of switchable capacitance is then investigated at multiple LNA nodes to observe the effect on S11, S21, and NF. After calibration, the new design allows for 300MHz of frequency tuning and improvements in Sn by 7.2dB, S21 by 2.4dB, and NF by 0.6dB.