Paper Info
Title
A 12.5mg mm-Scale Inductively-Powered Light-Directivity-Enhanced Highly-Linear Bidirectional Optogenetic Neuro-Stimulator
Abstract
The design, development, and experimental validation of a mm-scale self-contained bidirectional optogenetic stimulator are presented. A novel current-mode LED driving circuit architecture is employed that allows for fully-linear control of optical stimulation up to I <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">LED</sub> =10mA, with the smallest reported 200mV headroom, significantly boosting the electrical-to-optical energy conversion efficiency. The system's energy efficiency is further improved by inkjet printing of custom-designed optical μlenses on top of the device to enhance the generated light directivity. Our results show a 30.46× irradiance (optical power per area) improvement for the same electrical power consumption. In addition to the two stimulation channels, the SoC integrates two recording channels for LFP recording and digitization, and is powered through an on-chip coil with PTE=2.24%. Full experimental SoC electrical and optical characterization and in vitro measurement results are reported.
Year
DOI
Venue
2020
10.1109/CICC48029.2020.9075932
2020 IEEE Custom Integrated Circuits Conference (CICC)
Keywords
DocType
ISSN
mm-scale self-contained bidirectional optogenetic stimulator,inductively-powered optogenetic neuro-stimulator,light-directivity-enhanced optogenetic neuro-stimulator,highly-linear bidirectional optogenetic neuro-stimulator,current-mode LED driving circuit architecture,SoC,electrical-to-optical energy conversion efficiency,LFP recording,on-chip coil,fully-linear control,optical stimulation,voltage 200.0 mV,mass 12.5 mg
Conference
0886-5930
ISBN
Citations 
PageRank 
978-1-7281-6032-0
0
0.34
References 
Authors
0
7
Name
Order
Citations
PageRank
Tayebeh Yousefi142.86
Mansour Taghadosi200.34
Alireza Dabbaghian332.49
Ryan Siu400.34
Gerd Grau500.34
Georg Zoidi600.34
hossein kassiri7498.60