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