Title
A charge-balanced 4-wire interface for the interconnections of biomedical implants
Abstract
This paper presents a charge-balanced 4-wire interface on medical platinum wires for biomedical implants. This interface was originally designed to deliver power and full duplex data between implanted units of a retinal prosthesis. Detailed circuits on both sides of the wire interface are depicted. The proposed method ensures the total electrical charge is balanced over time within the implant to avoid the risk of harmful irreversible electrochemical reactions. Experiments show that the data links using this 4-wire interface design has minimal Bit Error Rate (BER) and very low cost in terms of power and area consumptions. The forward data recovery consumes 300 μW at 600 kbps with an area of 15×200 μm2 in 65nm CMOS. The backward data encoding circuit requires an average current of a mere 3 μA at 100 kbps while its area is 15×140 μm2.
Year
DOI
Venue
2013
10.1109/BioCAS.2013.6679674
Biomedical Circuits and Systems Conference
Keywords
Field
DocType
biomedical electronics,error statistics,eye,interconnections,prosthetics,vision,4-wire interface design,cmos,backward data encoding circuit,biomedical implants,bit error rate,charge-balanced 4-wire interface,current 3 mua,data links,electrical charge,electrochemical reactions,forward data,full duplex data,medical platinum wires,power 300 muw,power consumptions,power duplex data,retinal prosthesis,wire interface
Computer science,Electric charge,CMOS,Electronic engineering,Data recovery,Electronic circuit,Electrical engineering,Data link,Bit error rate,Interface design,Duplex (telecommunications)
Conference
ISSN
Citations 
PageRank 
2163-4025
3
0.45
References 
Authors
8
10
Name
Order
Citations
PageRank
jin yang130.45
shiyang bai230.45
nguyencac tran330.45
hosung chun430.79
Omid Kavehei527331.47
Jiawei Yang6484.49
Efstratios Skafidas720032.11
Mark E. Halpern8132.24
David Ng9273.12
Vijay Muktamath10161.30