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A complete analysis and measurement results of the threshold voltage cancellation scheme for RF to DC converter

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Abstract

In this work, the threshold voltage cancellation scheme for the RF-to-DC converter used in RF energy harvesting is presented. The proposed scheme reduces the threshold voltage of PMOS transistor used in CMOS rectifier with the use of additional CMOS components. The performance of the proposed scheme is evaluated against the conventional CMOS rectifier in terms of the power conversion efficiency (PCE). Measurements were done at 433 MHz RF frequency for resistive load values ranging from 1 to 120 K\(\Omega\). The measured peak PCE of the conventional CMOS and proposed rectifiers are 16 and 35 %, respectively, for the input RF power level of \(-8\) dBm and resistive load of value 10 K\(\Omega\). The implementation of the proposed scheme is also tested in the multi-stage rectifier circuit (MSC) topology. All PMOS-based DTMOS-biased MSC circuit was selected to implement the proposed scheme and for performance comparison. The measured results show the PCE of a five stage DTMOS-biased MSC circuit is 15 % @ \(-6\) dBm with 66 K\(\Omega\) resistive load whereas after implementing proposed scheme on the alternate PMOS transistors of DTMOS-biased MSC circuit resulted into 19 % PCE for the same input and output conditions.

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Acknowledgments

This work has been funded by the projects, AUTOVOLT of the Academy of Finland, EFFINANO of the Aalto University and is supported by the NOKIA Foundation, Finland.

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  1. Department of Micro and Nano Sciences, Aalto University, Espoo, Finland

    Shailesh Singh Chouhan & Kari Halonen

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  1. Shailesh Singh Chouhan
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  2. Kari Halonen
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Correspondence to Shailesh Singh Chouhan.

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Chouhan, S.S., Halonen, K. A complete analysis and measurement results of the threshold voltage cancellation scheme for RF to DC converter. Analog Integr Circ Sig Process 87, 223–233 (2016). https://doi.org/10.1007/s10470-015-0630-z

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  • DOI: https://doi.org/10.1007/s10470-015-0630-z

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