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A 2.4-GHz sub-mW CMOS receiver front-end for wireless sensors network

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4 Author(s)
Taeksang Song ; Dept. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea ; Hyoung-Seok Oh ; Songcheol Hong ; Euisik Yoon

A 2.4-GHz fully integrated CMOS receiver front-end using current-reused folded-cascode circuit scheme is presented. A configuration utilizing vertically stacked low-noise amplifier (LNA) and a folded-cascode mixer is proposed to improve both conversion gain and noise figure suitable for sub-mW receiver circuits. The proposed front-end achieves a conversion gain of 31.5dB and a noise figure of 11.8dB at 10MHz with 500-μA bias current from a 1.0-V power supply. The conversion gain and noise figure improvements of the proposed front-end over a conventional merged LNA and single-balanced mixer are 11dB and 7.2dB at 10MHz, respectively, with the same power consumption of 500μW.

Published in:

Microwave and Wireless Components Letters, IEEE  (Volume:16 ,  Issue: 4 )