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Related Experiment Video

Updated: May 27, 2026

Engineering Platform and Experimental Protocol for Design and Evaluation of a Neurally-controlled Powered Transfemoral Prosthesis

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Published on: July 22, 2014

[Design of power and data telemetry system utilizing Class-E amplifier for visual prosthesis].

Bo Liu¹, Kaijie Wu, Xiaobei Wu

¹Department of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.

Zhongguo Yi Liao Qi Xie Za Zhi = Chinese Journal of Medical Instrumentation

|November 22, 2011

Summary

This study presents a compact wireless system for visual prostheses, efficiently transmitting power and data using a single coil pair. The system successfully supports a 16-channel micro-stimulator, enabling advanced visual restoration technologies.

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Area of Science:

Biomedical Engineering
Electrical Engineering
Neuroscience

Background:

Visual prostheses aim to restore sight but require efficient power and data transmission.
Existing wireless systems often face challenges with size and efficiency.
Miniaturization is crucial for implantable medical devices like visual prostheses.

Purpose of the Study:

To develop a compact and efficient wireless transmission system for visual prostheses.
To enable reliable power delivery and data transfer for micro-stimulators.
To reduce the overall size of the visual prosthesis system.

Main Methods:

A wireless transmission system utilizing a single inductive coil pair for power and data.
Implementation of a Class-E power amplifier for high efficiency.
Integration of an Amplitude-Shift Keying (ASK) modulation circuit with 25% modulation depth.
Development and testing of an experimental system supporting a 16-channel micro-stimulator.

Main Results:

The system achieved efficient wireless power and data transmission using a single coil pair.
The Class-E amplifier and ASK modulation ensured high efficiency and controlled data transfer.
Experimental tests confirmed sufficient power delivery and data transfer rates for a 16-channel micro-stimulator.
The compact design, due to the single coil pair, is suitable for implantable devices.

Conclusions:

The developed wireless transmission system is a viable solution for visual prostheses.
The system's efficiency and compact size meet the requirements for supporting micro-stimulators.
This technology advances the development of smaller and more effective visual restoration devices.