A unified DLL-controlled active rectifier in 6.78MHz resonant-coupling wireless power receivers for space-limited portable and wearable applications

Hee-am Shin; Young-Jae Min

doi:10.1587/elex.15.20180399

This article has now been updated. Please use the final version.

A unified DLL-controlled active rectifier in 6.78MHz resonant-coupling wireless power receivers for space-limited portable and wearable applications

Hee-am Shin, Young-Jae Min

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Keywords: Active rectifier, Delay-locked loop (DLL), Resonant-coupling wireless power receiver, Space-limited wearable and portable application

JOURNAL FREE ACCESS Advance online publication

Article ID: 15.20180399

DOI https://doi.org/10.1587/elex.15.20180399

The final version of this article is now available: Vol. 15 (2018), No. 12 pp. 20180399-20180399

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Abstract

An active rectifier in 6.78MHz resonant-coupling wireless power receivers for space-limited portable and wearable applications is presented. To improve the power efficiency and reduce the die area, a fully NMOS transistor-based active rectifier with a unified delay-locked loop (DLL) controller is proposed. The proposed rectifier has been implemented in a 0.35μm CMOS technology with a die area of 0.612mm². The measured peak and minimum power efficiency within the power range of 80mw to 440mW are 91.8% and 69.6%, respectively.

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