Design of ultralow power receiver front-ends for 2.4 GHz wireless sensor network applications
Autor: | Chen Liang, Wang Zengqi, Wu Chenjian, Li Zhiqun, Zhang Meng |
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Rok vydání: | 2014 |
Předmět: |
Engineering
Open-loop gain business.industry Subthreshold conduction Low gain dBm Electrical engineering Condensed Matter Physics Noise figure Electronic Optical and Magnetic Materials Power consumption Materials Chemistry Electronic engineering Conversion gain Electrical and Electronic Engineering business Wireless sensor network |
Zdroj: | Journal of Semiconductors. 35:015005 |
ISSN: | 1674-4926 |
Popis: | This paper presents the design of an ultralow power receiver front-end designed for a wireless sensor network (WSN) in a 0.18 μm CMOS process. The author designs two front-ends working in the saturation region and the subthreshold region respectively. The front-ends contain a two-stage cross-coupling cascaded common-gate (CG) LNA and a quadrature Gilbert IQ mixer. The measured conversion gain is variable with high gain at 24 dB and low gain at 7 dB for the saturation one, and high gain at 22 dB and low gain at 5 dB for the subthreshold one. The noise figure (NF) at high gain mode is 5.1 dB and 6.3 dB for each. The input 1 dB compression point (IP1dB) at low gain mode is about −6 dBm and −3 dBm for each. The front-ends consume about 2.1 mA current from 1.8 V power supply for the saturation one and 1.3 mA current for the subthreshold one. The measured results show that, comparing with the power consumption saving, it is worth making sacrifices on the performance for using the subthreshold technology. |
Databáze: | OpenAIRE |
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