CMOS passive wake-up circuit for sensor network applications

• Published in: Microwave and optical technology letters Vol. 52; no. 3; pp. 597 - 600
• Main Authors: Kim, Hyungchul, Cho, Hanjin, Xi, Yao, Kim, Minsu, Kwon, Sungwook, Lim, Joonhyung, Yang, Youngoo
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 01.03.2010
• Subjects: Circuit design; Circuits; CMOS; duty cycle scheduling; Electric potential; Inverters; Networks; Power control; radio identification; sensitivity; sensor network; wake-up circuit
• ISSN: 0895-2477; 1098-2760
• DOI: 10.1002/mop.24982

A passive wake‐up circuit with high‐voltage sensitivity using standard CMOS technology has been designed and implemented.Voltage multipliers and inverter chain optimized for high‐voltage sensitivity have been proposed. A radio identification scheme to make peer‐to‐peer communication has also been proposed. The wake‐up circuit converts small‐RF input signals into a DC signal to trigger the interrupt. A duty cycle scheduling is adopted for an advanced power control. Using an RF input signal, whose center frequency is 870 MHz and input power is −29.3 dBm, we achieved an output voltage of 0.7 V, enough to trigger on the output. The fully integrated CMOS IC is fabricated using a 0.18‐μm standard CMOS process. The chip area is as small as 230 × 190 μm2. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 597–600, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24982