Design of a Low Phase Noise VCO for WSN Applications

Xiao Ming Si; Xiang Ning Fan; Li Tang; Jian Jiang

doi:10.4028/www.scientific.net/AMM.577.620

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 577Design of a Low Phase Noise VCO for WSN...

Design of a Low Phase Noise VCO for WSN Applications

Abstract:

A fully integrated LC VCO with 1V low voltage supply, applied in the frequency synthesizer for wireless sensor network applications, is designed and implemented in TSMC 0.18μm RF/MS CMOS process with low power consumption and good phase noise performance. To conquer the problems brought by low voltage, the structure of VCO is carefully selected. A 4 bit switched capacitor array is used to widen tuning range without worsen the phase noise performance. Besides, a 2 bit switched tail current source array is used to achieve power consumption adapted to the desired operating scenario. Second harmonic filter technology is taken to improve phase noise performance. The VCO designed in this paper has good phase noise performance and low power consumption by optimization. The chip size is 860μm×730μm. Post-simulation results show that the frequency range is between 4.57~6.18GHz with tuning range 30%, the center frequency is 5.375GHz, and the power consumption of VCO core is between 2.6~4mW. At the meanwhile, phase noise is between-116.0~ -117.8dBc@1.0MHz.

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Periodical:

Applied Mechanics and Materials (Volume 577)

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620-623

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.577.620

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Online since:

July 2014

Authors:

Xiao Ming Si*, Xiang Ning Fan, Li Tang, Jian Jiang

Keywords:

Low Phase Noise, Low Voltage, VCO, Wireless Sensor Network (WSN)

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