DocumentCode :
2486569
Title :
Adjustable Voltage Sensors for Power Supply Chains in Passive UHF RFID Transponders
Author :
Morales-Ramos, R. ; Montiel-Nelson, Juan A. ; Milosiu, H. ; Berenguer, R. ; García-Alonso, A.
Author_Institution :
Inst. for Appl. Microelectron., Univ. of Las Palmas de GC, Las Palmas de G.C.
fYear :
2006
fDate :
20-22 Sept. 2006
Firstpage :
286
Lastpage :
291
Abstract :
In passive UHF RFID transponders, a storage capacitor is used to supply the tag´s subsystems. A quick charge of the storage capacitor and a sufficient supply voltage for the subsystems are intended for proper operation, thus using a voltage sensor. This paper presents two adjustable very low power consumption voltage sensor circuits for the supply capacitor in passive UHF RFID transponders. The proposed circuits sense the charge stored in a supply capacitor and enable 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 two solutions is below 100 nA, for a supply voltage between 2.5 V and 3.3 V
Keywords :
UHF radio propagation; electric sensing devices; power supplies to apparatus; transponders; voltage measurement; passive UHF RFID transponder; power supply chain; storage capacitor; supply capacitor; voltage sensor circuit; Capacitive sensors; Capacitors; Energy consumption; Passive RFID tags; Radio frequency; Radiofrequency identification; Supply chains; Transponders; UHF circuits; Voltage;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Emerging Technologies and Factory Automation, 2006. ETFA '06. IEEE Conference on
Conference_Location :
Prague
Print_ISBN :
0-7803-9758-4
Type :
conf
DOI :
10.1109/ETFA.2006.355372
Filename :
4178205
Link To Document :
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