Advanced demultiplexing system for physiological stimulation

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Publication Type Journal Article
School or College School of Medicine
Department Ophthalmology; Bioengineering; Surgery; Physiology
Creator Normann, Richard A.; Jones, Kelly E.
Title Advanced demultiplexing system for physiological stimulation
Date 1997
Description A CMOS very large scale integration (VLSI) chip has been designed and built to implement a scheme developed for multiplexing/demultiplexing the signals required to operate an intracortical stimulating electrode array. Because the use of radio telemetry in a proposed system utilizing this chip may impose limits upon the rate of data transmission to the chip, the scheme described herein was used to reduce the amount of digital information which must be sent to control a large quantity (up to several hundred) of stimulating electrodes. By incorporating multiple current sources on chip, many channels may be stimulated simultaneously. By incorporating on-chip timers, control over pulse timing is assigned to the chip, reducing by up to fourfold the amount of control data which must be sent. By incorporating on-chip RAM, information associated with the desired stimulus amplitude and pulse timing can be stored on chip. In this manner, it is necessary to send control information to the chip only when the information changes, rather than at the stimulus repeat rate for each channel. This further reduces the data rate by a factor of five to ten times or more. The architecture described here, implemented as an eight-channel stimulator, is scalable to a 625-channel stimulator while keeping data transmission rates under 2 Mbps.
Type Text
Publisher Institute of Electrical and Electronics Engineers (IEEE)
Volume 44
Issue 12
First Page 1210
Last Page 1220
Subject Electrode Array; Stimulation; Telemetry; Microelectrodes; Transistors
Subject MESH Analog-Digital Conversion; Cerebral Cortex; Electric Stimulation Therapy; Neurophysiology
Language eng
Bibliographic Citation Jones KE, Normann RA. (1997). An advanced demultiplexing system for physiological stimulation. IEEE Trans Biomed Eng, 44(12), 1210-20
Rights Management © Institute of Electrical and Electronics Engineers (IEEE)
Format Medium application/pdf
Identifier ir-main,12728
ARK ark:/87278/s6pz5t06
Setname ir_uspace
Date Created 2012-06-13
Date Modified 2021-05-06
ID 703325
Reference URL