A selectable bandwidth LNA based on current conveyors

Author

Garcia-Vazquez, H. ; Khemchandani, S.L. ; Dualibe, C. ; del Pino, J.

Author_Institution

Service d´électronique et de Microélectronique (SEMi), Université de Mons (UMONS), Boulevard Dolez 31, 7000 Mons, Belgium

fYear

2015

fDate

30-31 July 2015

Firstpage

33

Lastpage

36

Abstract

A selectable bandwidth CMOS Low Noise Amplifier (LNA) implemented in UMC 90nm process is presented. The LNA employs two current conveyors as building blocks to implement a wideband UHF (470 MHz to 862 MHz) voltage amplifier. By means of a switch and an LC tank added at the output, the LNA can operate also in the GSM narrowband (1.8 GHz). Using this simple technique it is possible to use only one LNA for both standards. Simulation results validate the proposed circuit. The simulated power gain (S21) is 13 dB for UHF band, and 6 dB for GSM. The input return loss (S11) is better than −10 dB in both modes. The amplifier has a simulated noise figure (NF) of 5.8 dB for UHF band and 6.3 dB when it is working in GSM band. This amplifier draws 3.9 mA from a ±1.2V supply.

Keywords

CMOS integrated circuits; GSM; Gain; Impedance matching; Low-noise amplifiers; Switches; Wideband; Bandwidth; LC tank; LNA; current conveyor; switch;

fLanguage

English

Publisher

ieee

Conference_Titel

Micro-Nanoelectronics, Technology and Applications (EAMTA), 2015 Argentine School of

Conference_Location

Villa Maria, Argentina

Print_ISBN

978-1-4799-8017-8

Type

conf

DOI

10.1109/EAMTA.2015.7237375

Filename

7237375