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Design of a tunable LNA and its variability analysis through surrogate modeling
Author(s) -
Xhafa Xhesila,
Yelten Mustafa Berke
Publication year - 2020
Publication title -
international journal of numerical modelling: electronic networks, devices and fields
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.249
H-Index - 30
eISSN - 1099-1204
pISSN - 0894-3370
DOI - 10.1002/jnm.2724
Subject(s) - low noise amplifier , bandwidth (computing) , capacitance , electronic engineering , noise figure , voltage , amplifier , computer science , power consumption , electrical engineering , power (physics) , engineering , telecommunications , physics , electrode , quantum mechanics
Abstract In this paper, a tunable low noise amplifier (LNA), which provides a bandwidth of 1 GHz, has been designed. The tunability of the LNA has been achieved by employing MOS varactors in accumulation mode. A shift in the LNA performance has been observed with the change in the total capacitance of the varactors through the control voltage. Starting from 2 to 3 GHz, the proposed tunable LNA provides a noise figure (NF) of less than 3 dB, a voltage gain of 12 dB and higher, while maintaining input and output power matching ( S 11 and S 22 ) metrics at least below −12 dB. The total power consumption of the circuit is 23 mW. Moreover, two case studies that demonstrate the usage of surrogate modeling in RF circuit design have been described. Three‐ and six‐dimensional surrogate models have been built to illustrate the effect of bondwires on the variability of several LNA design metrics.