Title :
A high speed comparator based active rectifier for wireless power transfer systems
Author :
Yang Sun ; Chang-Jin Jeong ; Seok-Kyun Han ; Sang-Gug Lee
Author_Institution :
Dept. of Electr. Eng., KAIST (Korea Adv. Inst. of Sci. & Technol.), Daejeon, South Korea
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.
Keywords :
CMOS integrated circuits; comparators (circuits); inductive power transmission; power transistors; rectifying circuits; CMOS technology; active rectifier; high speed comparator; interface circuitry; power transistor problem; wireless power transfer systems; CMOS integrated circuits; Control systems; Delay; Power conversion; Power transistors; Rectifiers; Wireless communication; Active Rectifier; Comparator; Leakage; Power Conversion Efficiency; Wireless Power Transfer;
Conference_Titel :
Intelligent Radio for Future Personal Terminals (IMWS-IRFPT), 2011 IEEE MTT-S International Microwave Workshop Series on
Conference_Location :
Daejeon
Print_ISBN :
978-1-4577-0961-6
Electronic_ISBN :
978-1-4577-0963-0
DOI :
10.1109/IMWS2.2011.6027216
