A four-channel IBM PC/AT compatible biphasic pulse generator for nerve stimulation

Area of Science:

• Biomedical Engineering
• Neuroscience
• Medical Device Technology

Background:

• Functional Electrical Stimulation (FES) research requires precise control over electrical stimulation parameters.
• Existing systems may lack the necessary channel count or precise timing control for complex FES applications.

Purpose of the Study:

• To develop and present a versatile four-channel biphasic pulse generator for FES research.
• To provide a platform for detailed characterization of percutaneous electrodes in multichannel stimulation.

Main Methods:

• The system utilizes an IBM PC/AT compatible architecture.
• Each of the four channels features a 12-bit digital-to-analog converter (DAC) for voltage pulse generation (+/- 5 VDC).
• Three 16-bit timers per channel manage pulse durations (first, second, interphase) with vectored interrupt generators for timing accuracy.

Main Results:

• The developed generator successfully produces biphasic voltage pulses with controlled parameters.
• The system allows for precise timing control crucial for advanced FES protocols.
• The device is suitable for FES research and electrode recruitment property characterization.

Conclusions:

• The four-channel biphasic pulse generator is a valuable tool for advancing FES research.
• Its precise control capabilities make it suitable for characterizing electrode performance in multichannel systems.
• The device can serve as a component in commercial medical devices requiring electrical stimulation on an IBM PC/AT platform.