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A fully integrated mixed-signal neural processor for implantable multichannel cortical recording
Amir M Sodagar1, Kensall D Wise, Khalil Najafi
1University of Technology, Tehran, Iran. asodagar@umich.edu
IEEE Transactions on Bio-Medical Engineering
|June 8, 2007
Summary
A new 64-channel neural processor enables implantable neural recording microsystems to detect and transmit neural spikes efficiently. It offers programmable thresholding and high-resolution monitoring for advanced neuroscience research.
Area of Science:
- Neuroscience
- Biomedical Engineering
- Electrical Engineering
Background:
- Implantable neural recording microsystems are crucial for studying brain activity.
- Efficient processing and transmission of neural data are key challenges in microsystem design.
Purpose of the Study:
- To develop a versatile 64-channel neural processor for implantable neural recording.
- To enable programmable detection and high-resolution monitoring of neural signals.
Main Methods:
- Designed a 64-channel neural processor with programmable thresholding (positive, negative, window).
- Implemented spike tagging with channel addresses and 18-bit data word formation.
- Developed a Monitor Mode for high-resolution viewing of two selected channels.
Main Results:
- The processor achieves a channel scan rate of 64 kS/s and an output bit rate of 2 Mbps.
- Programmable thresholding allows flexible neural spike detection.
- High-resolution monitoring provides detailed signal analysis capabilities.
Conclusions:
- The developed neural processor effectively supports implantable neural recording microsystems.
- The device offers efficient neural spike detection and data transmission.
- Its dual modes cater to both broad spike detection and detailed signal analysis needs.
