Title :
A 0.6V and 0.53µW nonius TDC for a passive UHF RFID pressure sensor tag
Author :
Jimenez-Irastorza, A. ; Beriain, A. ; Sevillano, Juan Francisco ; Rebollo, I. ; Berenguer, R.
Author_Institution :
CEIT & TECNUN, Univ. of Navarra, San Sebastián, Spain
Abstract :
This work presents a full passive UHF RFID pressure sensor tag which uses a nonius based TDC capacitive sensor interface. The proposed converter has a fully digital output and allows reducing power consumption while maintaining the required resolution. The nonius based TDC has been designed using TSMC 90nm standard CMOS technology. Post-layout simulations show that the converter presents a 12 bit resolution and 9 effective bits in the time range from 10μs to 40μs when VDD varies in the range from 0.55V to 0.7V and temperature variations in the range from 0°C to 60°C are considered. The maximum measurement time is 49.9μs and the average power consumption of the converter is 0.53μW at 10 samples per second from a 0.6V voltage supply.
Keywords :
CMOS digital integrated circuits; capacitive sensors; pressure sensors; radiofrequency identification; time-digital conversion; TSMC standard CMOS technology; full passive UHF RFID pressure sensor tag; nonius based TDC capacitive sensor interface; power 0.53 muW; size 90 nm; temperature 0 degC to 60 degC; time 10 mus to 40 mus; time 49.9 mus; voltage 0.55 V to 0.7 V; word length 12 bit; Frequency measurement; Frequency modulation; Oscillators; Power demand; Radiation detectors; Radiofrequency identification; Time measurement; Time-to-digital converter; counter; nonius; oscillator; pressure sensor;
Conference_Titel :
RFID-Technologies and Applications (RFID-TA), 2012 IEEE International Conference on
Conference_Location :
Nice
Print_ISBN :
978-1-4673-4656-6
Electronic_ISBN :
978-1-4673-4658-0
DOI :
10.1109/RFID-TA.2012.6404516
