A CMOS Active Rectifier with Efficiency-Improving and Digitally Adaptive Delay Compensation for Wireless Power Transfer Systems

Yichen Zhang, Junye Ma and Xian Tang
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Yichen Zhang: Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
Junye Ma: Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
Xian Tang: Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China

Energies, 2021, vol. 14, issue 23, 1-15

Abstract: A CMOS active rectifier with digitally adaptive delay compensation for power efficiency improvement is presented in this work. The power transistors are turned on and turned off in advance under the control of the regenerated compensation signals, which are generated by the proposed compensation control circuit; therefore, the reverse current is eliminated, and the efficiency is increased. Simulation results in a standard 0.18 μm CMOS process show that the turn-on and turn-off delay of the rectifier is effectively compensated. The power efficiency is up to 90.6% when the proposed rectifier works at the operation frequency of 13.56 MHz.

Keywords: adaptive delay compensation; active rectifier; wireless power transfer (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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