Title :
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.
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;
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
DOI :
10.1109/DSD.2006.94
