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A 0.016² 12b ΔΣSAR With 14fJ/conv. for ultra low power biosensor arrays
File | Description | Size | Format | |
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07949142.pdf | Published version | 3.39 MB | Adobe PDF | View/Open |
Title: | A 0.016² 12b ΔΣSAR With 14fJ/conv. for ultra low power biosensor arrays |
Authors: | Leene, L Constandinou, TG |
Item Type: | Journal Article |
Abstract: | The instrumentation systems for implantable brain-machine interfaces represent one of the most demanding applications for ultra low-power analogue-to-digital-converters (ADC) to date. To address this challenge, this paper proposes a ΔΣSAR topology for very large sensor arrays that allows an exceptional reduction in silicon footprint by using a continuous time 0-2 MASH topology. This configuration uses a specialized FIR window to decimate the ΔΣ modulator output and reject mismatch errors from the SAR quantizer, which mitigates the overhead from dynamic element matching techniques commonly used to achieve high precision. A fully differential prototype was fabricated using 0.18 μm CMOS to demonstrate 10.8 ENOB precision with a 0.016 mm² silicon footprint. Moreover, a 14 fJ/conv figure-of-merit can be achieved, while resolving signals with the maximum input amplitude of ±1.2,Vpp sampled at 200 kS/s. The ADC topology exhibits a number of promising characteristics for both high speed and ultra low-power systems due to the reduced complexity, switching noise, sampling load, and oversampling ratio, which are critical parameters for many sensor applications. |
Issue Date: | 15-Jun-2017 |
Date of Acceptance: | 6-May-2017 |
URI: | http://hdl.handle.net/10044/1/49319 |
DOI: | https://dx.doi.org/10.1109/TCSI.2017.2703580 |
ISSN: | 1549-8328 |
Publisher: | Institute of Electrical and Electronics Engineers (IEEE) |
Start Page: | 2655 |
End Page: | 2665 |
Journal / Book Title: | IEEE Transactions on Circuits and Systems. Part 1: Regular Papers |
Volume: | 64 |
Issue: | 10 |
Copyright Statement: | © 2017 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission.See http://www.ieee.org/publications_standards/publications/rights/index.html for more information. |
Sponsor/Funder: | Engineering & Physical Science Research Council (EPSRC) Engineering & Physical Science Research Council (EPSRC) |
Funder's Grant Number: | EP/K015060/1 EP/M020975/1 |
Keywords: | 0906 Electrical And Electronic Engineering Electrical & Electronic Engineering |
Publication Status: | Published |
Open Access location: | http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=7949142 |
Appears in Collections: | Electrical and Electronic Engineering Faculty of Engineering |