Integrated Low-Loss CMOS Active Rectifier for Wirelessly Powered Devices

Author

Lam, Yat-Hei ; Ki, Wing-Hung ; Tsui, Chi-ying

Author_Institution

Dept. of Electron. & Comput. Eng, Hong Kong Univ. of Sci. & Technol.

Volume

53

Issue

12

fYear

2006

Firstpage

1378

Lastpage

1382

Abstract

A low-loss CMOS full-wave active rectifier is presented. It consists of two dynamically biased and symmetrically matched active diodes each realized by an nMOS switch driven by a 2-ns voltage comparator with reverse-current control. With a load of 1.8-kOmega, the rectified dc voltage is 3.22 V and 1.2 V for a 13.56 MHz ac sinusoidal input voltage of 3.5 V and 1.5 V respectively. It is fabricated in a 0.35-mum CMOS process with an active area of 0.0055 mm ², with no low-threshold devices and on-chip passive components

Keywords

AC-DC power convertors; CMOS integrated circuits; radiofrequency identification; rectifiers; AC-DC power conversion; RFID; radio frequency identification; rectifiers; symmetrical matching; wireless power transmission; CMOS process; Circuits; MOSFETs; Power conversion; Radio frequency; Radiofrequency identification; Rectifiers; Schottky diodes; Switches; Voltage control; AC–DC power conversion; radio-frequency identification (RFID); rectifiers; symmetrical matching; wireless power transmission;

fLanguage

English

Journal_Title

Circuits and Systems II: Express Briefs, IEEE Transactions on

Publisher

ieee

ISSN

1549-7747

Type

jour

DOI

10.1109/TCSII.2006.885400

Filename

4033155