DocumentCode :
3767389
Title :
Noise figure analysis of 2.5 GHz folded cascode LNA using high-Q layout optimized inductors
Author :
Shashank Tiwari;Venkata Narayana Rao Vanukuru;Jayanta Mukherjee
Author_Institution :
Electrical Engineering Department, IIT Bombay, India
fYear :
2015
Firstpage :
94
Lastpage :
97
Abstract :
The effect of inductor quality factor (Q) on the noise figure (NF) of a folded cascode low noise amplifier (LNA) is thoroughly studied for different values of DC power consumption. At lower power levels, the contribution of inductor Q towards the overall noise figure is shown to be less. Area optimized inductors with lower Q values can be used in such designs. However, for higher power levels, achievable NF is lower and is significantly affected by the Q of inductors. It is shown that layout optimized high-Q inductors can further reduce the NF by more than 10%. A 2.5 GHz LNA designed and simulated using 0.18 μm RF SOI process is shown to exhibit 1.4 dB NF while consuming 2.5 mW power with the return loss at the input and output better than 30 dB.
Keywords :
"Inductors","Noise measurement","Q-factor","Impedance matching","Layout","Logic gates","Resonant frequency"
Publisher :
ieee
Conference_Titel :
Microelectronics and Electronics (PrimeAsia), 2015 IEEE Asia Pacific Conference on Postgraduate Research in
Electronic_ISBN :
2159-2160
Type :
conf
DOI :
10.1109/PrimeAsia.2015.7450477
Filename :
7450477
Link To Document :
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