摘要
设计了一个用于软件无线电的高线性度、低功耗的无源下变频混频器,采用TSMC 65 nm CMOS工艺实现,芯片面积为0.2 mm^2,总功耗为8 mW@1.2 V.混频器中采用了改进的Gm单元,结合源级负反馈技术和MGTR技术,在提高混频器IIP_3的同时,拓宽了输入线性区域的范围.测试结果表明:线性区域的范围得到一定程度的提高,即使输入RF信号的功率为-12 dBm.混频器的IIP_3≥10.9 dBm,IIP_2≥45 dBm;在900 MHz处,混频器获得最大转换增益13.2 dB,此时NF为13.8 dB.
A low power, high linearity passive down-conversion mixer for SDR is presented, which is implemented in TSMC 65 nm CMOS process with 0. 2 rnmz core area and 8 mW power consumption under 1. 2 V supply voltage. Combining source negative feedback with MGTR technique, the IIP3 performance is improved, and the input linearity region is also extended. Measured results show that a good linearity is achieved, even the power of input RF signal is up to -12 dBm Specifically, this passive mixer achieves higher than 10.9 dBm IIP3, IIP2≥45 dBm, and 13.8 dB NF under 13. 2 dB max conversion gain, when LO frequency is 900 MHz.
出处
《复旦学报（自然科学版）》
CAS
CSCD
北大核心
2014年第1期29-36,共8页
Journal of Fudan University：Natural Science
基金
国家自然科学基金资助项目(61076028)
高等学校博士学科点专项科研基金资助项目(20100071120026)
