▶ 반도체공동연구소 세미나 안내 ◀
BioBolt: A Minimally-Invasive Neural Interface for Wireless Epidural Recording by Intra-Skin Communication
- 일 시: 2011년 6월 22일 수요일 11:00
- 장 소: 서울대학교 반도체공동연구소 설계연구관 3층 회의실
- 연 사: 장 선 일 연구원(Ph.D. Candidate, University of Michigan)
In this presentation, a new concept of BioBolt: a distributed minimally-invasive neural interface for wireless epidural recording will be introduced. The main purpose of this work is to optimize the trade-off between the quality of neural information and the invasiveness of the neural interface systems. The technical challenge for the successful realization of the proposed system is to acquire the performance required within utmost constraints brought by small size, low-power, low-noise, and minimal invasiveness of the system. To achieve these aims, the proposed neural interface system has introduced seven innovations as follows: (1) spatially distributed BioBolts in the region of interest record the neural activities, specifically (2) epidural recording from the surface of dura mater. (3) For the expandability of the system, we introduce a cluster-based system where a cluster consists of multiple BioBolts to expand the sensing coverage and modalities. The recorded signals from each BioBolt node are transmitted through the (4) intra-skin communication (ISCOM), and collected and transmitted by the external station using FM communication. To secure the long-term reliability for chronic monitoring, the whole system will be (5) subcutaneously implanted inside the cranium to eliminate any possible infections from external environments. Furthermore, in contrast with other implantable ECoG systems where the operation of the craniotomy is required, the handiness of the bolt-shaped system concept can differentiate the proposed system from other existing systems by providing the simple and safe operation protocol of implantation and explantation. (6) Extreme low-power analog front-end including a low-noise preamplifier and analog-to-digital converter has been proposed to ensure a robust interface, because the neural potentials are vulnerable to external interference such as drift/offset from the cell-electrode interface and power line noise.
SUN-IL CHANG was born January 28th, 1978 at Seoul South Korea. He received a B.S. degree in Electrical Engineering from Korea University (Seoul, Korea) in 2003, and a M.S. from the University of Minnesota in 2008. He is currently pursuing a Ph.D. degree in EECS at the University of Michigan. His research area is developing an implantable wireless neural recording and stimulation system with the low-noise, low-power analog front-end, signal processor, and wireless communication methods.
담당교수 : 전기컴퓨터공학부 김수환교수 (문의 : 김은영, Tel. 880-9575 )