Paper Info
Title
A Battery-Powered Opto-Electrophysiology Neural Interface with Artifact-Preventing Optical Pulse Shaping
Abstract
We present a neural interface IC for high-precision optical stimulation and electrical recording from implanted optoelectrodes with the highest system integration to date. The system combines 12 high-resolution constant-current LED driver channels, 32 recording channels, and an efficient PMU for operation from a low voltage Li battery on a wireless platform. A novel LED driver architecture features a high-efficiency wide-current-range fully-integrated voltage regulator and a high-resolution pulse shaper to minimize recording artifacts from sharp current pulse edges. A prototype, fabricated in 0.18μm CMOS, occupies 7.35mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> . The LED driver has a peak efficiency of 50% and consumes 31μW quiescent power. We demonstrate in-vivo that the pulse-shaping scheme prevents stimulation artifacts.
Year
DOI
Venue
2018
10.1109/VLSIC.2018.8502353
2018 IEEE Symposium on VLSI Circuits
Keywords
Field
DocType
system integration,recording channels,low voltage lithium battery,LED driver architecture,current pulse edges,CMOS,LED driver architecture features,wireless platform,efficient PMU,high-resolution constant-current LED driver channels,implanted optoelectrodes,electrical recording,high-precision optical stimulation,neural interface IC,artifact-preventing optical pulse shaping,battery-powered opto-electrophysiology neural interface,stimulation artifacts,pulse-shaping scheme,sharp current pulse edges,recording artifacts,high-resolution pulse shaper,high-efficiency wide-current-range fully-integrated voltage regulator,size 0.18 mum,power 31.0 muW,efficiency 50 percent,Li
Computer science,Pulse-width modulation,Pulse (signal processing),Electronic engineering,Pulse shaping,CMOS,Low voltage,Light-emitting diode,Battery (electricity),Voltage regulator
Conference
ISSN
ISBN
Citations 
2158-5601
978-1-5386-4215-3
0
PageRank 
References 
Authors
0.34
0
5
Name
Order
Citations
PageRank
Adam E. Mendrela162.31
Sung-Yun Park222.76
Mihaly Voroslakos300.68
Michael P. Flynn442167.71
Euisik Yoon510916.58