Optimized passive devices for low-power LNA design

Author

Gil, Ignacio ; Fernández, Raúl ; Sieiro, J.J. ; López-Villegas, José M.

Author_Institution

Dept. d´´Eng. Electron., Univ. Politec. de Catalunya (UPC), Terrassa, Spain

fYear

2010

fDate

12-15 Dec. 2010

Firstpage

90

Lastpage

93

Abstract

This paper addresses the design of high-Q passive inductors and differential transformers in a low-power low-noise amplifier (LNA) application. The passives quality in resonant LC tanks as well as in the matching network and degeneration inductors has been improved by balancing the trade-off between ohmic losses and Eddy current degradation. As a result, the enhanced passives Q-factor for the optimized passive devices has been used in order to design a 2.4 GHz fully integrated high-gain current-reused LNA, implemented in 0.18 μm CMOS technology. The LNA performance show a gain of roughly 30 dB, while dissipating 0.9 mA from a 1.2 V supply.

Keywords

CMOS analogue integrated circuits; UHF amplifiers; differential transformers; eddy current losses; inductors; low noise amplifiers; low-power electronics; current 0.9 mA; degeneration inductor; differential transformer; eddy current degradation; frequency 2.4 GHz; fully integrated high-gain current-reused LNA; gain 30 dB; high-Q passive inductor; low-power low- noise amplifier application; ohmic loss; optimized passive device; resonant LC tank; size 0.18 mum; voltage 1.2 V; CMOS integrated circuits; CMOS technology; Magnetic resonance; ISM-band; LNA; Low-power; Q-factor;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Circuits, and Systems (ICECS), 2010 17th IEEE International Conference on

Conference_Location

Athens

Print_ISBN

978-1-4244-8155-2

Type

conf

DOI

10.1109/ICECS.2010.5724461

Filename

5724461