A passive UHF RFID tag with a dynamic-Vth-cancellation rectifier

This paper presents a passive UHF RFID tag with a dynamicVthcancellation （DVC） rectifier. In the rectifier, the threshold voltages of MOSFETs are cancelled by applying gate bias voltages, which are dynamically changed according to the states of the MOSFETs. The DVC rectifier enables both low ONresis...

Full description

Saved in:
Bibliographic Details
Published in:半导体学报：英文版 2013-09 (9), p.117-121
Main Author: 沈劲鹏 汪波 刘珊 王新安 阮正坤 李守成
Format: Article
Language:English
Subjects:
CMOS工艺
MOSFET
RFID标签
UHF
功率转换效率
整流器
无源
芯片尺寸
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper presents a passive UHF RFID tag with a dynamicVthcancellation （DVC） rectifier. In the rectifier, the threshold voltages of MOSFETs are cancelled by applying gate bias voltages, which are dynamically changed according to the states of the MOSFETs. The DVC rectifier enables both low ONresistance and small re verse leakage of the MOSFETs, resulting in high power conversion efficiency （PCE）. An areaefficient demodulator with a novel average detector is also designed, which takes advantage of the rectifier＇s first stage as the envelope detector. The whole tag chip is implemented in a 0.18 μm CMOS process with a die size of 880 x 950μm2. Measurement results show that the rectifier achieves a maximum PCE of 53.7% with 80 kΩ resistor load.
ISSN:1674-4926
DOI:10.1088/1674-4926/34/9/095005