Title :
A remotely powered multi frequency RFID sensing tag with integrated impedance measurement interface
Author :
Wiessflecker, Martin ; Hofer, G. ; Reinisch, Hannes ; Gruber, Sebastian ; Holweg, Gerald ; Pachler, Walther ; Klamminger, Michael ; Pribyl, W.
Author_Institution :
Contactless & RF Exploration, Infineon Technol. Austria AG, Graz, Austria
Abstract :
This paper presents a remotely powered sensing tag for biomedical applications. Energy is transfered by an EM-field to a dual frequency band antenna and fed to an analog front end. The AC voltage resulting on the antenna gets rectified, pumped to 3.3V and stored in an 2.2μF buffer capacitor. When the buffer capacitor is full a measurement with an integrated impedance measurement circuit can be processed while the RFID field is deactivated to get a noise reduced measurement sample. The circuit is developed in a 130nm CMOS technology and occupies an active area of 2.3mm2.
Keywords :
CMOS integrated circuits; biomedical equipment; buffer circuits; capacitors; electric impedance measurement; electromagnetic fields; multifrequency antennas; radiofrequency identification; wireless sensor networks; AC voltage rectification; CMOS technology; EM field; analog front end; biomedical application; buffer capacitor; capacitance 2.2 muF; dual frequency band antenna; integrated impedance measurement interface; measurement sample; remotely powered multifrequency RFID sensing tag; size 130 nm; voltage 3.3 V; Capacitors; Current measurement; Frequency measurement; Impedance measurement; Semiconductor device measurement; Voltage control; Voltage measurement;
Conference_Titel :
Circuits and Systems (ISCAS), 2013 IEEE International Symposium on
Conference_Location :
Beijing
Print_ISBN :
978-1-4673-5760-9
DOI :
10.1109/ISCAS.2013.6572240
