Low-power wake-up receiver with subthreshold CMOS circuits for wireless sensor networks

We developed a wake-up receiver comprised of subthreshold CMOS circuits. The proposed receiver includes an envelope detector, a high-gain baseband amplifier, a clock and data recovery (CDR) circuit, and a wake-up signal recognition circuit. The drain nonlinearity in the subthreshold region effectively detects the baseband signal with a microwave carrier. The offset cancellation method with a biasing circuit operated by the subthreshold produces a high gain of more than 100 dB for the baseband amplifier. A pulse-width modulation (PWM) CDR drastically reduces the power consumption of the receiver. A 2.4-GHz detector, a high-gain amplifier and a PWM clock recovery circuit were designed and fabricated with 0.18-μm CMOS process with one poly and six metal layers. The fabricated detector and high-gain amplifier achieved a sensitivity of −47.2 dBm while consuming only 6.8 μW from a 1.5 V supply. The fabricated clock recovery circuit operated successfully up to 500 kbps.

[1]  S. Gambini,et al.  A 52 $\mu$ W Wake-Up Receiver With $-$ 72 dBm Sensitivity Using an Uncertain-IF Architecture , 2009, IEEE Journal of Solid-State Circuits.

[2]  L.E. Larson,et al.  Passive RF Receiver Design for Wireless Sensor Networks , 2007, 2007 IEEE/MTT-S International Microwave Symposium.

[3]  Y. Amemiya,et al.  A 300 nW, 15 ppm/$^{\circ}$C, 20 ppm/V CMOS Voltage Reference Circuit Consisting of Subthreshold MOSFETs , 2009, IEEE Journal of Solid-State Circuits.

[4]  Tetsuya Asai,et al.  Offset cancellation with subthreshold-operated feedback circuit for fully differential amplifiers , 2009, 2009 16th IEEE International Conference on Electronics, Circuits and Systems - (ICECS 2009).

[5]  Sébastien Roy,et al.  Low-Power 2.4 GHz Wake-Up Radio for Wireless Sensor Networks , 2008, 2008 IEEE International Conference on Wireless and Mobile Computing, Networking and Communications.

[6]  A.P. Chandrakasan,et al.  Next generation micro-power systems , 2008, 2008 IEEE Symposium on VLSI Circuits.

[7]  H. Yoshida,et al.  A 950-MHz rectifier circuit for sensor network tags with 10-m distance , 2006, IEEE Journal of Solid-State Circuits.