A high speed comparator based active rectifier for wireless power transfer systems

Abstract

Wireless power transfer technique can be used in many applications nowadays. The main limitation of this wireless power transfer system is in their interface circuitry. In this paper, a highly efficient active rectifier is proposed. By adopting the high speed comparator and, proposed rectifier solved the turn on and off delay of power transistor problem of conventional rectifier and shows high power conversion efficiency. Based on 0.35 um CMOS technology, the simulated power efficiency of the proposed rectifier is 92%. The proposed active rectifier improves upon the power conversion efficiency by 1.66 times compared to the conventional one.