Design of 900~2250MHz Broad-band Differential LNA with Variable Gain
A broad-band variable-gain differential LNA for Satellite-broadcast TV operating in the frequency bands of 900MHz~2250MHz is presented. A third-order Chebyshev band-pass Filter is used as input matching circuit; Two cascode-structure circuits are employed as the key stage of gain (KSG) and the control stage of gain (CSG) respectively, both of the output loads of the two-stage circuits adopt shunt-peaking structure, the CSG change the value of the gain with making use of the drain-to-source Resistance Miller effect and feedback of transistors; A source-follower is designed to match output. In the TSMC 0.18um CMOS technology, 1.8V operating voltage and 1.3V~1.6V control voltage of gain, this LNA achieve 75Ji input and output matching and broad variable-gain ranges, moreover, acquire excellent noise performance, linearity and low power consumption.
LNA broad-band variable gain shunt peaking
Li Song-ting Li Jian-cheng Wang Jin-zhen Yang Qing
ASIC R&D Center, School of Electronic Science and Engineering National University of Defense Technology Changsha, China
国际会议
太原
英文
581-587
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）