A voltage regulator system with dynamic bandwidth boosting for passive UHF RFID transponders

This paper presents a voltage regulator system for passive UHF RFID transponders, which contains a rectifier, a limiter, and a regulator. The rectifier achieves power by rectifying the incoming RF energy. Due to the huge variation of the rectified voltage, a limiter at the rectifier output is used t...

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Bibliographic Details
Published inJournal of semiconductors Vol. 34; no. 10; pp. 102 - 106
Main Author 沈劲鹏 王新安 刘珊 李守成 阮正坤
Format Journal Article
LanguageEnglish
Published 01.10.2013
Subjects
Dynamical systems
Dynamics
Electric potential
Rectifiers
Regulators
RFID标签
Semiconductors
Voltage
Voltage regulators
射频能量
带宽
无源
电压调节器
调节系统
超高频
输出电压
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Summary:This paper presents a voltage regulator system for passive UHF RFID transponders, which contains a rectifier, a limiter, and a regulator. The rectifier achieves power by rectifying the incoming RF energy. Due to the huge variation of the rectified voltage, a limiter at the rectifier output is used to clamp the rectified voltage. In this paper, the design of a limiter circuit is discussed in detail, which can provide a stable limiting voltage with low sensitivity to temperature variation and process dispersion. The key aspect of the voltage regulator system is the dynamic bandwidth boosting in the regulator. By sensing the excess current that is bypassed in the limiter during periods of excess energy, the bias current as well as the bandwidth of the regulator are increased, the output supply voltage can recover quickly from line transients during the periods of no RF energy to a full blast of RF energy. This voltage regulator system is implemented in a 0.18μm CMOS process.
Bibliography:This paper presents a voltage regulator system for passive UHF RFID transponders, which contains a rectifier, a limiter, and a regulator. The rectifier achieves power by rectifying the incoming RF energy. Due to the huge variation of the rectified voltage, a limiter at the rectifier output is used to clamp the rectified voltage. In this paper, the design of a limiter circuit is discussed in detail, which can provide a stable limiting voltage with low sensitivity to temperature variation and process dispersion. The key aspect of the voltage regulator system is the dynamic bandwidth boosting in the regulator. By sensing the excess current that is bypassed in the limiter during periods of excess energy, the bias current as well as the bandwidth of the regulator are increased, the output supply voltage can recover quickly from line transients during the periods of no RF energy to a full blast of RF energy. This voltage regulator system is implemented in a 0.18μm CMOS process.
Shen Jinpeng, Wang Xin＇an, Liu Shan, Li Shoucheng, Ruan Zhengkun（ Key Laboratory of Integrated Microsystems, Peking University Shenzhen Graduate School, Shenzhen 518055, China）
passive RFID transponder; limiter; regulator; dynamic bandwidth boosting
11-5781/TN
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1674-4926
DOI:10.1088/1674-4926/34/10/105004