A Cross-Coupled 3 × /4× step-up AC-DC converters for RFID tags

Author

Eguchi, Kei ; Watanabe, Toshiya ; Tirasesth, Kitti ; Pongswatd, Swai ; Fujimoto, Kuniaki ; Sasaki, Hirofumi

Author_Institution

Dept. of Technol. Educ., Shizuoka Univ., Shizuoka, Japan

fYear

2010

fDate

19-21 May 2010

Firstpage

1221

Lastpage

1225

Abstract

Due to the threshold voltage drop caused by diodeswitches, conventional AC-DC converters for RFID tags cannot be applied to mobile applications which require higher voltages. To make matters worse, the power efficiency decreases by the influence of threshold voltage. To solve these problems, two types of cross-coupled AC-DC converters for RFID tags are proposed in this paper: the 3× step-up converter and the 4× step-up converter. By using negative step-up converters and cross-coupled connection of CMOS switches, the proposed converters are able not only to offer higher output voltages but also to improve power efficiency. The characteristics of the proposed converters are clarified by theoretical analyses. Furthermore, the SPICE simulation and the experiment showed the validity of theoretical formulas and circuit design.

Keywords

AC-DC power convertors; CMOS integrated circuits; diodes; radiofrequency identification; switches; CMOS switches; RFID tags; cross-coupled connection; cross-coupled step-up AC-DC converters; diodeswitches; mobile applications; negative step-up converters; power efficiency; threshold voltage drop; AC-DC power converters; Analog-digital conversion; Circuit simulation; Circuit synthesis; Diodes; RFID tags; SPICE; Switches; Switching converters; Threshold voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Engineering/Electronics Computer Telecommunications and Information Technology (ECTI-CON), 2010 International Conference on

Conference_Location

Chaing Mai

Print_ISBN

978-1-4244-5606-2

Electronic_ISBN

978-1-4244-5607-9

Type

conf

Filename

5491672