| Title |
CMOS Rectifier Design with Bootstrap Technology for 5.8 GHz Wireless Power Transfer |
| Authors |
채홍(Hong Chae) ; 합사 아울리아 아자하라(Azzahra Hapsah Aulia) ; 안현식(Hyeon-Sik Ahn) ; 김주성(Jusung Kim) |
| DOI |
https://doi.org/10.5573/ieie.2024.61.10.42 |
| Keywords |
Bootstrap technique; Dynamic range; Power conversion efficiency (PCE); Rectifier; Wireless power transfer (WPT) |
| Abstract |
In this paper, we propose a large dynamic-range rectifier for wireless power transfer operating at 5.8 GHz using capacitor biasing technique. The proposed rectifier biases the gate voltage of CMOS transistor using a bootstrap capacitor, which improves the problem of reduced power conversion efficiency due to large leakage current and high threshold voltage generated by conventional CMOS rectifiers, and possesses a low effective threshold voltage, which enables the rectification to proceed with high efficiency even in a low input power range. The proposed rectifier is fabricated in TSMC 65nm BULK CMOS technology, and layout simulation results show that it has a power conversion efficiency of 52 % at an input power of -6 dBm and a load resistance of 24K ohms, and a dynamic range of over 20 % efficiency from -16 dBm to 3 dBm. |