Characterization and Redesign of the AFIT Multielectrode Array.

Abstract

Since 1978, faculty and graduate students from the Air Force Institute of Technology (AFIT) have been working on an implantable circuit array that can record visual signals from the brain or stimulate the brain. In the current design the circuit is a 16 x 16 array of pads, each pad being 160 x 160 micrometers with 250 micrometers spacing with an 'L' shaped reference pad used as a ground reference. The array is multiplexed so that only one I/O line is required to access all 256 pads. This research was twofold: first to analyze the existing circuit and identify sources for noise and then to redesign the circuit with the intent of reducing noise and power consumption. As a result of the research, a new 16 x 17 array has been developed. The new design incorporates new demultiplexing and synchronizing circuitry. The new circuitry exhibits lower noise and consumes much less power. The 'L' shaped reference pad has been removed-instead each pad and the pad to its right are sampled concurrent1y-one as the sample and one as a reference.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1994
Accession Number
ADA289295

Entities

People

  • Richard G. Darenberg

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Brain
  • Circuit Analysis
  • Complementary Metal-Oxide Semiconductors
  • Electrical Engineering
  • Energy Consumption
  • Field Effect Transistors
  • Medical Personnel
  • Metal Oxide Semiconductors
  • Metal Oxides
  • Pattern Recognition
  • Plastic Explosives
  • Prostheses And Implants
  • Prosthetics
  • Semiconductors
  • Square Waves
  • Waveform Generators
  • Waveforms

Readers

  • Aerospace Research.
  • Image Processing and Computer Vision.
  • Integrated Circuit Design and Technology.

Technology Areas

  • Space