Author details

Xi Sung Loo1,2\*, Kiat Seng Yeo2 , Joel Yang1 , Chee Huei Lee<sup>1</sup> , Rong Zhao<sup>1</sup> and Moe Z. Win<sup>2</sup>

\*Address all correspondence to: xisung\_loo@sutd.edu.sg


#### References


[5] Seong D, Jang K, Hwang W, Jeon H, Choi J. Radio-frequency energy-harvesting IC with DC-DC converter. In: 2016 International SoC Design Conference (ISOCC); Jeju; 2016. pp. 339-340

disconnected. Such circuit can also be used directly for battery charging and power other high voltage device under windy environment. An AC voltage doubler based on self-powered inverting op-amp is also presented. It is attractive for use to replace transformer given its miniature size. Besides that, it could be extended for wireless charging application since boosted AC voltage can be transmitted wirelessly and provide more charging power than those harvest directly from RF signal. The self-powered inverting op-amp circuit could be transformed into variable DC voltage generator when a voltage multiplier is attached to its output. It can vary by 90% of op-amp supply voltage when a voltage doubler is connected at the output. By doing so, the circuit allows flexibility to powered electronic devices of different

The authors would like to thank Singapore University of Technology & Design for the support

, Chee Huei Lee<sup>1</sup>

[1] Lead-Acid Battery Recycling [Online]. 2011. Available from: www.worstpolluted.org/

[2] Soyata T, Copeland L, Heinzelman W. RF energy harvesting for embedded systems: A survey of tradeoffs and methodology. IEEE Circuits and Systems Magazine. Firstquarter

[3] Makowski MS, Maksimovic D. Performance limits of switched-capacitor DC-DC converters. In: Proceedings of the 26th Annual IEEE Power Electronics Specialists Conference

[4] Chang YH, Chen YC. Multistage multiphase switched capacitor DC-DC converter with variable-phase and PWM control. International Journal of Circuit Theory and Applica-

, Rong Zhao<sup>1</sup> and Moe Z. Win<sup>2</sup>

supply voltage requirements through harvesting energy from wind.

156 Advanced Electronic Circuits - Principles, Architectures and Applications on Emerging Technologies

, Joel Yang1

2 Massachusetts Institute of Technology, Cambridge, Massachusetts, USA

1 Singapore University of Technology and Design (SUTD), Singapore

\*Address all correspondence to: xisung\_loo@sutd.edu.sg

(PESC '95). Vol. 2; June 1995. pp. 1215-1221

Acknowledgements

to this publication.

Author details

References

Xi Sung Loo1,2\*, Kiat Seng Yeo2

projects\_reports/display/90

tions. 2012;8(40):835-857

2016;16(1):22-57


[18] Cheng S, Jin Y, Rao Y, Arnold DP. An active voltage doubling AC/DC converter for lowvoltage energy harvesting applications. IEEE Transactions on Power Electronics. Aug. 2011;26(8):2258-2265

**Section 4**

**Circuit Test and Analysis**

