Frequency-domain adaptive-resolution level-crossing-sampling ADC

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Title: Frequency-domain adaptive-resolution level-crossing-sampling ADC
Authors: Wang, HongyingSchembari, FilippoStaszewski, Robert BogdanMiśkowicz, Marek
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Date: 29-Aug-2017
Online since: 2019-08-26T07:43:41Z
Abstract: In the framework of the large-scale wireless sensor networks involved in the Internet-of-Things (IoT), analog-to-digital converters (ADCs) must target ever increasing levels of power efficiency and amenability to ultra-scaled CMOS technologies. Digitally intensive architectures and smart conversion algorithms are therefore the fuel of future ultra-low power (ULP) designs. The minimization of the output average bitrate is an effective way to maximize the system energy efficiency. Level-crossing-sampling (LC) ADCs are a class of converters that addresses such problem. In their conventional implementation, however, they are mainly impaired by analog blocks (i.e. the high-performance comparators), difficult to be designed in deep nanoscale CMOS. This paper describes a highly-digital frequency-domain implementation of a LC ADC, which replaces the analog comparators with an oscillator-based quantizer and simple digital logic. LC is performed in the digital frequency-domain, where the application of adaptive-resolution algorithms to further enhance power efficiency becomes straightforward. Behavioral modeling simulations demonstrate the appropriateness of the proposed topology by comparing it with the conventional designs and by evaluating the impact of the oscillator-based-quantizer nonidealities on the ADC performance.
Funding Details: European Commission Horizon 2020
Science Foundation Ireland
Type of material: Conference Publication
Publisher: IEEE
Start page: 1
End page: 5
Copyright (published version): 2017 IEEE
Keywords: Analog-to-digital converterLevel-crossing-samplingAdaptive-resolutionVCO-based quantizerFrequency domain
DOI: 10.1109/EBCCSP.2017.8022825
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Language: en
Status of Item: Not peer reviewed
Is part of: 2017 3rd International Conference on Event-Based Control, Communication and Signal Processing, EBCCSP 2017 - Proceedings
Conference Details: EBCCSP 2017: 3rd International Conference on Event-Based Control, Communication and Signal Processing, Funchal, Madeira, Portugal, 24-26 May 2017
ISBN: 9781538609156
Appears in Collections:Electrical and Electronic Engineering Research Collection

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