Voltage Sensors for Supply Capacitor in Passive UHF RFID Transponders

Author

Ramos, R. Morales ; Nelson, Juan A Montiel ; Berenguer, R. ; Alonso, A. García

Author_Institution

Inst. for Appl. Microelectron., Univ. of Las Palmas de G.C.

fYear

0

fDate

0-0 0

Firstpage

625

Lastpage

629

Abstract

This paper presents two very low-power consumption voltage-sensor circuits for the supply capacitor in passive UHF RFID transponders. The proposed circuits are key points in a battery-life-free RFID tag, by sensing the charge stored in a supply capacitor, and enabling the rest of the system when enough charge is available. In comparison to previous published circuits, the average current of our circuits is one order of magnitude lower. The average current consumption for our solutions is below 100 nA, for a supply voltage between 2.5 V and 3.3 V. In addition, we have proposed some modifications to the best published results; and diminished the power consumption one order of magnitude

Keywords

UHF circuits; capacitor storage; electric sensing devices; low-power electronics; radiofrequency identification; transponders; voltage measurement; 2.5 V; 3.3 V; battery-life-free RFID tag; charge storage; low-power consumption; passive UHF RFID transponder; radiofrequency identification; supply capacitor; voltage-sensor circuits; CMOS technology; Capacitive sensors; Capacitors; Circuits; Energy consumption; Passive RFID tags; RFID tags; Radiofrequency identification; Transponders; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Digital System Design: Architectures, Methods and Tools, 2006. DSD 2006. 9th EUROMICRO Conference on

Conference_Location

Dubrovnik

Print_ISBN

0-7695-2609-8

Type

conf

DOI

10.1109/DSD.2006.94

Filename

1690096