%0 Journal Article
%T Tunable current mirror and its application in LNA<br>可调节镜像电流源的研究及其在LNA中应用
%A Li Kun
%A Teng Jianfu
%A Yu Changliang
%A Huang Jianyao
%A <br>李琨
%A 滕建辅
%A 余长亮
%A 黄建尧
%J 半导体学报
%D 2009
%I 
%X A novel topology of current mirror (CM) with tunable output current is proposed. Two methods for output current tuning are presented. The first one utilizes an analog input voltage for linear current output, and the second one has an N-bit digital input signal for 2N un-continuous current outputs. A linearization method for low noise amplifier (LNA) is proposed and realized with this tunable CM. As the provider of the bias current, the CM has brought the LNA a lower NF (noise figure) and a higher IIP3 (input-referred third-order intercept point) compared with a conventional one. The experimental results show that the LNA achieves 1.47 dB NF and +19.83 dBm IIP3 at 860 MHz.
%K current mirror
%K tunable
%K LNA
%K bias current
%K linearization<br>镜像电流源，可调节，低噪声放大器，偏置电流，线性化
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=025C8057C4D37C4BA0041DC7DE7C758F&aid=FEC0150A9599ABA747D3B979318A27EC&yid=DE12191FBD62783C&vid=340AC2BF8E7AB4FD&iid=59906B3B2830C2C5&sid=2BEF3DB399BC8F17&eid=94C357A881DFC066&journal_id=1674-4926&journal_name=半导体学报&referenced_num=0&reference_num=0