Title
A 64-Channels Neural Interface For Biopotentials Recording And Pns Stimulation
Abstract
A biomedical interface that combines into a single and compact device the recording of biopotentials and the electrical stimulation of neural fibres is presented. It is intended for enabling the control over a robotic hand and for restoring the sensory feedback in amputees by directly interfacing the peripheral nervous system (PNS) in closed-loop. A modular system consisting in one or more independent 16-channels bidirectional units was conceived. Each module is based on three 0.35 mu m bulk-CMOS integrated circuits (ICs): a recording unit, a High-Voltage (HV) stimulator and a HV booster. A tunable bandwidth (1 0 Hz-8kHz) allows the recording IC to acquire both electroneurographyc (ENG) and electromiographyc (EMG) signals with a programmable gain up to 43.5 dB. The signals are then converted into a digital domain by means of a Sigma Delta converter. Due to the typical high impedance at the electrode-tissue interface, a programmable HV booster that increases the stimulation voltage up to 19V was designed. It is directly controlled by the stimulation module that generates current-based pulses with a programmable amplitude and pulse-width. The whole system was validated by means of in vivo experiments in rats.
Year
DOI
Venue
2017
10.1109/EMBC.2017.8037228
2017 39TH ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY (EMBC)
Field
DocType
Volume
Computer science,Brain–computer interface,Voltage,Interfacing,Communication channel,Electronic engineering,Bandwidth (signal processing),Modular design,Electrical engineering,Integrated circuit,High impedance
Conference
2017
ISSN
Citations 
PageRank 
1094-687X
0
0.34
References 
Authors
4
13