Integrated Low-Loss CMOS Active Rectifier for Wirelessly Powered Devices

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...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems. 2, Analog and digital signal processing Analog and digital signal processing, 2006-12, Vol.53 (12), p.1378-1382
Main Authors: Lam, Y.-H., Wing-Hung Ki, Chi-Ying Tsui
Format: Article
Language:English
Subjects:
AC-DC power conversion
Active control
Circuits
CMOS
CMOS process
Devices
Dynamical systems
Electric potential
MOSFETs
Passive components
Power conversion
Radio frequency
radio-frequency identification (RFID)
Radiofrequency identification
Rectifiers
Schottky diodes
Switches
symmetrical matching
Voltage
Voltage control
wireless power transmission
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Description
Summary: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
ISSN:1549-7747
1057-7130
1558-3791
DOI:10.1109/TCSII.2006.885400