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Open AccessFeature PaperArticle

An FSK and OOK Compatible RF Demodulator for Wake Up Receivers

1
University of Bordeaux, IMS Lab, 341 Cours de la Liberation, Talence 33405, France
2
BeSpoon, 17 rue du lac Saint André, 73372 Le Bourget du Lac, France
3
CEA Leti, 17 av des Martyrs, 38000 Grenoble, France
*
Author to whom correspondence should be addressed.
Academic Editor: Domenico Zito
J. Low Power Electron. Appl. 2015, 5(4), 274-290; https://doi.org/10.3390/jlpea5040274
Received: 23 April 2015 / Revised: 2 November 2015 / Accepted: 4 November 2015 / Published: 30 November 2015
(This article belongs to the Special Issue Low-Power Systems on Chip Enabling Internet of Things)
This work proposes a novel demodulation circuit to address the implementation of Wake-Up Receivers (Wu-Rx) in Wireless Sensor Nodes (WSN). This RF demodulator, namely Modulated Oscillator for envelOpe Detection (MOOD), is compatible with both FSK and OOK/ASK modulation schemes. The system embeds an LC oscillator, an envelope detector and a base-band amplifier. To optimize the trade-off between RF performances and power consumption, the cross-coupled based oscillator is biased in moderate inversion region. The proof of concept is implemented in a 65 nm CMOS technology and is intended for the 2.4 GHz ISM band. With a supply voltage of 0.5 V, the demodulator consumes 120 μW and demonstrates the demodulation of OOK and FSK at a data rate of 500 kbps. View Full-Text
Keywords: radio-frequency front-end; ultra low power; wake up receiver; demodulation radio-frequency front-end; ultra low power; wake up receiver; demodulation
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Taris, T.; Kraimia, H.; Belot, D.; Deval, Y. An FSK and OOK Compatible RF Demodulator for Wake Up Receivers. J. Low Power Electron. Appl. 2015, 5, 274-290.

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