Authors: Mabrouki, Aya; Taris, Thierry; Deval, Yann; Bégueret, Jean-Baptiste

Source: Journal of Low Power Electronics, Volume 7, Number 2, April 2011 , pp. 199-208(10)

Publisher: American Scientific Publishers

Abstract:

In this paper, an optimum body biasing for gain and linearity control in CMOS Low Noise Amplifier (LNA) is discussed. A digitally controlled highly linear CMOS LNA has been designed and implemented in a 0.13 μm CMOS process. An off chip Digital to Analog Converter (DAC) is used to generate the proper body bias voltage corresponding to a maximum of the input referred third order intercept point (IIP3). The LNA is suitable for reconfigurable purposes due to its smooth control of gain and linearity. It is dedicated to wireless sensor network applications in the 2.4 GHz ISM Band. The circuit achieves 12.4 dB nominal gain, 4.2 dB noise figure (NF), and −1 dBm IIP3 while drawing 3.1 mA at a 1 V supply. When adjusting the body bias to −0.55 V, the IIP3 peaks at 6 dBm for a 1.7 mA current consumption. The gain and NF are 8.9 dB and 6.2 dB respectively.

Keywords: LOW NOISE AMPLIFIER (LNA); NOISE FIGURE (NF); THIRD ORDER INTERCEPT POINT (IIP3); THIRD ORDER INTERMODULATION DISTORTION (IM3); DIGITAL TO ANALOG CONVERTER (DAC)

Document Type: Research article

DOI: http://dx.doi.org/10.1166/jolpe.2011.1128

Publication date: 2011-04-01

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• The electronic systems that can operate with very low power are of great technological interest. The growing research activity in the field of low power electronics requires a forum for rapid dissemination of important results: Journal of Low Power Electronics (JOLPE) is that international forum which offers scientists and engineers timely, peer-reviewed research in this field.
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