A digital reverse current self-calibration technique in 90% high efficiency rectified power supply for near field communication through magnetic field induction

Li Chi Lin, Kuan Yu Chen, Wen Hau Yang, Ru Yu Huang, Ke-Horng Chen, Ying Hsi Lin, Shian Ru Lin, Tsung Yen Tsai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

It is crucial in near field communication (NFC) controllers for power source transferred from mutual induction of coils when the devices are battery-off. NFC devices can be operated at the condition of low battery or even battery-off due to the requirement of payment any time. Thus, the proposed wireless power transfer (WPT) power supply can have high efficiency due to the remove of reverse leakage current by the digital reverse current self-calibration (DRCS). NFC standards including A, B, and F can be continuously supplied by the WPT supply system. The WPT power supply with the DRCS technique was fabricated in 0.25μm CMOS process can rectify AC source from induction of magnetic field to unregulated DC voltage source and to supply power the NFC controller through low dropout regulator (LDR). Moreover, test chip achieves as high as 92% voltage conversion ratio and 89.4 % power conversion efficiency (PCE) due to reduction of unnecessary current loss.

Original languageEnglish
Title of host publicationIEEE International Symposium on Circuits and Systems
Subtitle of host publicationFrom Dreams to Innovation, ISCAS 2017 - Conference Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781467368520
DOIs
StatePublished - 25 Sep 2017
Event50th IEEE International Symposium on Circuits and Systems, ISCAS 2017 - Baltimore, United States
Duration: 28 May 201731 May 2017

Publication series

NameProceedings - IEEE International Symposium on Circuits and Systems
ISSN (Print)0271-4310

Conference

Conference50th IEEE International Symposium on Circuits and Systems, ISCAS 2017
CountryUnited States
CityBaltimore
Period28/05/1731/05/17

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  • Cite this

    Lin, L. C., Chen, K. Y., Yang, W. H., Huang, R. Y., Chen, K-H., Lin, Y. H., Lin, S. R., & Tsai, T. Y. (2017). A digital reverse current self-calibration technique in 90% high efficiency rectified power supply for near field communication through magnetic field induction. In IEEE International Symposium on Circuits and Systems: From Dreams to Innovation, ISCAS 2017 - Conference Proceedings [8050866] (Proceedings - IEEE International Symposium on Circuits and Systems). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ISCAS.2017.8050866