Variable gain broadband low noise amplifier using tunable active inductor

The variable gain broadband low noise amplifier (LNA) is presented in this paper using tunable active inductor (TAI). The active inductor is adopted instead of feedback spiral inductor in the intermediate amplification stage to achieve variable gain and extend bandwidth. Furthermore, a high gain pus...

Full description

Saved in:
Bibliographic Details
Published in2016 IEEE International Conference on Microwave and Millimeter Wave Technology (ICMMT) Vol. 1; pp. 114 - 116
Main Authors Qiangwei Deng, Wanrong Zhang, Dongyue Jin, Hongyun Xie, Na Wang
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.06.2016
Subjects
Active inductors
Frequency control
Gain
Noise measurement
Transistors
Voltage control
Wideband
Online AccessGet full text

Cover

More Information
Summary:The variable gain broadband low noise amplifier (LNA) is presented in this paper using tunable active inductor (TAI). The active inductor is adopted instead of feedback spiral inductor in the intermediate amplification stage to achieve variable gain and extend bandwidth. Furthermore, a high gain push-pull inverter with the feedback resistor is employed to realize a good trade-off between wideband matching and low noise figure (NF) in the input stage. At output stage, a source follower structure is adopted to achieve good output impedance matching. The LNA is verified by Advanced Design System (ADS). The results show that over the range of 0.5 GHz-5.5 GHz, the gain can be tuned from 15.5 dB to 19.6 dB, input and output return loss are better than -10 dB, the NF is less than 5 dB, and the total chip size is reduced dramatically.
DOI:10.1109/ICMMT.2016.7761694