NDLI: A CMOS chip with active imaging and stimulation pixels for implantable retinal prosthesis

Content Provider	IEEE Xplore Digital Library
Author	Xu Zhang Weihua Pei Beiju Huang Hongda Chen
Copyright Year	2010
Description	Author affiliation: State Key Laboratory for Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, China P.R. (Xu Zhang; Weihua Pei; Beiju Huang; Hongda Chen)
Abstract	A prototype chip with 4×4 active pixels for implanting in blind patients affected by outer retinal degeneration is presented in this paper. This visual prosthesis chip consists of the imaging and stimulation pixels array, power recovery unit and data and clock receiver. The chip imitates the degenerated photoreceptor cells, senses the incident light and stimulates the remaining healthy layers of retina or optic nerve. Each pixel integrates photodiode and stimulus pulse generator, which converts the illumination on the eyes into bi-phasic current pulses with 4-bit amplitude resolution and 3-bit frequency resolution. On-Chip charge cancellation modules are used to discharge each electrode site for tissue safety. The power is recovered by on-chip shottky-diodes rectifier and low-dropout regulator through inductive electromagnetic coupling with a 4 MHz carrier. The data and clock receiver receives the modulated outside command data from power carrier and controls the imaging and stimulation pixels array. The prototype chip is designed and fabricated in 0.35-μm N-well CMOS (Complementary Metal Oxide Semiconductor) 2P4M Mix-signal process, with the chip area of 2.5×2.5 $mm^{2}.$
Starting Page	98
Ending Page	101
File Size	394335
Page Count	4
File Format	PDF
ISBN	9781424472697
e-ISBN	9781424472703
e-ISBN	9781424472680
DOI	10.1109/BIOCAS.2010.5709580
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-11-03
Publisher Place	Cyprus
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	functional electrical stimulation visual prosthesis Imaging Receivers Visual prosthesis transcutaneous power and data transfer Retina CMOS image sensor Pixel Clocks
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in