Title :
A new transponder architecture for long-range telemetry applications
Author :
Kocer, Fatih ; Flynn, Michael P.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA
fDate :
28 Aug.-2 Sept. 2005
Abstract :
We present a transponder architecture for long range, remotely powered, sensor telemetry applications. Power and a reference clock are recovered from a 450 MHz incident RF signal, and data is modulated on a 900 MHz carrier. A high efficiency RF-DC converter generates a 3 VDC supply from a -123 dBm incident RF signal. An LC oscillator, injection locked to this incident RF signal, generates a high purity clock for high data rate transmission. A wireless operation range of more than 18 meters is indicated by anechoic chamber testing. Two versions, one with BPSK modulation, and another with on-off keying modulation, are implemented in a 5-metal 0.25μm CMOS process. These devices also incorporate an ADC and a temperature sensor. The total die is less than 1.1 mm2.
Keywords :
CMOS integrated circuits; analogue-digital conversion; anechoic chambers (electromagnetic); injection locked oscillators; phase shift keying; radiofrequency integrated circuits; telemetry; temperature sensors; transponders; 0.25 micron; 3 V; 450 MHz; 900 MHz; ADC circuit; BPSK modulation; CMOS process; LC oscillator; RF-DC converter; anechoic chamber testing; data modulation; incident RF signals; injection locked oscillator; long range sensor telemetry; on-off keying modulation; reference clock; temperature sensor; transponder architecture; wireless sensors; Anechoic chambers; Binary phase shift keying; Clocks; DC generators; Injection-locked oscillators; Signal generators; Telemetry; Testing; Transponders; Wireless sensor networks;
Conference_Titel :
Circuit Theory and Design, 2005. Proceedings of the 2005 European Conference on
Print_ISBN :
0-7803-9066-0
DOI :
10.1109/ECCTD.2005.1523022
