Record Details

Flexible Charge Balanced Stimulator With 5.6 fC Accuracy for 140 nC Injections

DSpace at IIT Bombay

View Archive Info
 
 
Field Value
 
Title Flexible Charge Balanced Stimulator With 5.6 fC Accuracy for 140 nC Injections
 
Creator NAG, S
JIA, XF
THAKOR, NV
SHARMA, D
 
Subject Charge balancing
electrical stimulation
floating current source
muscle evoked potentials (MEP)
CHRONIC ELECTRICAL-STIMULATION
AUDITORY-NERVE
COCHLEAR IMPLANTS
RETINA
PROSTHESIS
DRIVER
PULSE
CHIP
 
Description Electrical stimulations of neuronal structures must ensure net injected charges to be zero for biological safety and voltage compliance reasons. We present a novel architecture of general purpose biphasic constant current stimulator that exhibits less than 5.6 fC error while injecting 140 nC charges using 1.4 mA currents. The floating current sources and conveyor switch based system can operate in monopolar or bipolar modes. Anodic-first or cathodic-first pulses with optional inter-phase delays have been demonstrated with zero quiescent current requirements at the analog front-end. The architecture eliminates blocking capacitors, electrode shorting and complex feedbacks. Bench-top and in-vivo measurement results have been presented with emulated electrode impedances (resistor-capacitor network), Ag-AgCl electrodes in saline and in-vivo (acute) peripheral nerve stimulations in anesthetized rats.
 
Publisher IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
 
Date 2014-10-15T14:30:08Z
2014-10-15T14:30:08Z
2013
 
Type Article
 
Identifier IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS, 7(3)266-275
http://dx.doi.org/10.1109/TBCAS.2012.2205574
http://dspace.library.iitb.ac.in/jspui/handle/100/15106
 
Language en