A 13.56MHz CMOS active diode full-wave rectifier achieving ZVS with voltage-time-conversion delay-locked loop for wireless power transmission

摘要

A CMOS active diode rectifier for wireless power transmission with proposed voltage-time-conversion (VTC) delay-locked loop (DLL) control suppresses reverse current by realizing zero-voltage switching (ZVS), regardless of AC input and process variations. The proposed circuit is implemented in a standard 0.18μm CMOS process using I/O MOSFETs, which corresponds to 0.35μm technology. The maximum power conversion efficiency of 78% is obtained at 231Ω load resistance.