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J. Low Power Electron. Appl. 2015, 5(4), 274-290;

An FSK and OOK Compatible RF Demodulator for Wake Up Receivers

University of Bordeaux, IMS Lab, 341 Cours de la Liberation, Talence 33405, France
BeSpoon, 17 rue du lac Saint André, 73372 Le Bourget du Lac, France
CEA Leti, 17 av des Martyrs, 38000 Grenoble, France
Author to whom correspondence should be addressed.
Academic Editor: Domenico Zito
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)
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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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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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MDPI and ACS Style

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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J. Low Power Electron. Appl. EISSN 2079-9268 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
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