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Hexagonal Stimulation Digital Controller Design and Verification for Wireless Subretinal Implant Device.

Wajahat Abbasi1, Hojong Choi2, Jungsuk Kim3

  • 1Department of Health Science and Technology, Gachon Advanced Institute for Health Sciences and echnology, Incheon 21999, Korea.

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|April 23, 2022
PubMed
Summary
This summary is machine-generated.

This study introduces an economical wireless communication system for retinal implants using field-programmable gate arrays (FPGAs). The system addresses key challenges like power leakage and reliability, offering a cost-effective solution for visual prosthetics.

Keywords:
digital controllerfield-programmable gated arrayshexagonal stimulationwireless telemetry system

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Area of Science:

  • Biomedical Engineering
  • Neuroscience
  • Electrical Engineering

Background:

  • Micro/nano-retinal implant technologies have advanced, but face challenges with pixel range, power leakage, reliability, and lifespan.
  • Current active implantable devices offer safety and reliability but are often expensive, hindering commercial success.
  • Existing devices meeting regulatory standards are costly and may not be commercially viable.

Purpose of the Study:

  • To propose an economical, fully controllable, and configurable wireless communication system for retinal implants.
  • To address limitations of current retinal implant technologies, including power, reliability, and cost.
  • To develop a system capable of managing issues inherent in retinal implantation.

Main Methods:

  • Designed a wireless communication system utilizing field-programmable gate arrays (FPGAs).
  • Integrated two separate domain analog systems with a digital controller based on FPGAs.
  • Incorporated hexagonal biphasic stimulation pulses generated by a digitally controlled system.

Main Results:

  • The proposed FPGA-based system offers an economical solution for retinal implants.
  • The system demonstrates full controllability and configurability via an external transmitter.
  • In vitro verification confirmed the successful implementation and functionality of the microchip-based system.

Conclusions:

  • The developed system provides a cost-effective and reliable approach to retinal implantation.
  • This technology has the potential to overcome major hurdles in the commercialization of visual prosthetics.
  • The FPGA-based design offers a viable pathway for advanced, affordable retinal implant solutions.