Reconfigurable Ultra Low Power LNA for 2.4GHz Wireless Sensor Networks

Author

Taris, T. ; Mabrouki, A. ; Kraimia, H. ; Deval, Y. ; Begueret, J.B.

Author_Institution

IMS Lab., Univ. of Bordeaux, Talence, France

fYear

2010

fDate

12-15 Dec. 2010

Firstpage

74

Lastpage

77

Abstract

This work proposes an Ultra Low Power (ULP) digitally controlled LNA dedicated to Wireless Sensor Networks (WSN) implemented in a 0.13 μm CMOS technology. Both optimized topologies and reconfigurable issues are investigated to save power consumption. Based on a self biased inverter, the circuit, operating under 0.6 V, consumes 120 μW and achieves a gain of 14.6 dB and a NF of 3.8 dB at 2.4 GHz. To comply with the flexibility of the Wireless Sensor Network (WSN) in term of RF link budget variability, the core of the LNA can be reconfigured through a 3 bit DAC. Hence the gain and NF are 9.4 dB and 6.2 dB in the low gain mode, suited to cover a 10 m range, consuming 30 μW.

Keywords

CMOS analogue integrated circuits; UHF amplifiers; UHF integrated circuits; digital control; invertors; low noise amplifiers; low-power electronics; wireless sensor networks; DAC; RF link budget variability; distance 10 m; frequency 2.4 GHz; gain 14.6 dB; gain 6.2 dB; noise figure 3.8 dB; noise figure 9.4 dB; power 120 muW; power 30 muW; power consumption; self biased inverter; size 0.13 mum; ultra low power digitally controlled LNA; voltage 0.6 V; wireless sensor network; word length 3 bit; Wireless communication; Wireless sensor networks;

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.2010.5724457

Filename

5724457