Work

A wireless implantable switched-capacitor based optogenetic stimulating system

Year: 2014

Type: conference-paper

Abstract: This paper presents a power-efficient implantable optogenetic interface using a wireless switched-capacitor based stimulating (SCS) system. The SCS efficiently charges storage capacitors directly from an inductive link and periodically discharges them into an array of micro-LEDs, providing high instantaneous power without affecting wireless link and system supply voltage. A custom-designed computer interface in LabVIEW environment wirelessly controls stimulation parameters through the inductive link, and an optrode array enables simultaneous neural recording along with optical stimulation. The 4-channel SCS system prototype has been implemented in a 0.35-μm CMOS process and combined with the optrode array. In vivo experiments involving light-induced local field potentials verified the efficacy of the SCS system. An implantable version of the SCS system with flexible hermetic sealing is under development for chronic experiments.

DOI: 10.1109/embc.2014.6943731

Authors: Hyung-Min Lee, Ki-Yong Kwon, Wen Li, Maysam Ghovanloo

Institutions: Georgia Institute of Technology, Michigan State University

Language: English

Topic: Neuroscience and Neural Engineering

Subfield: Cellular and Molecular Neuroscience

Field: Neuroscience

Domain: Life Sciences

Open Access status: green

Funder: National Institute of Biomedical Imaging and Bioengineering

Awards: G4977427012, G5078118803, G7232831124

OpenAlex ID: W2332409010

FWCI: 13.08

Cites: 10

Cited by: 18

Related to: 10