A 2.4GHz/915MHz 51μW wake-up receiver with offset and noise suppression
conference paper
In order to simultaneously optimize network lifetime and latency in wireless sensor networks (WSN), an always-on wake-up receiver (WuRx) can be used to monitor the radio link continuously. For truly autonomous sensor nodes employing energy scavenging, only 50μW power is available for the WuRx [1]. An envelope detector is a popular choice in WuRx because of its low power consumption. However, the detector is always the bottleneck of the receiver sensitivity since it attenuates low level input signal and adds excessive noise. One way of improving sensitivity is to amplify the signal before the detector, for example at RF [2, 3] or IF [4] stages, to enhance the SNR at the output. ©2010 IEEE.
Topics
TNO Identifier
461587
ISSN
01936530
ISBN
9781424460342
Article nr.
05433958
Source title
2010 IEEE International Solid-State Circuits Conference, ISSCC 2010, 7 February 2010 through 11 February 2010, San Francisco, CA
Pages
222-223
Files
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