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An artifact-suppressed stimulator for simultaneous neural recording and stimulation systems
Summary
This study introduces a novel artifact-suppressed stimulator using referenced and tuned push-pull stimulation (RTPPS) to minimize interference during neural recording and stimulation. The technique significantly reduces stimulation artifacts, enabling clearer neural signal acquisition.
Area of Science:
- Biomedical Engineering
- Neuroscience
- Electrical Engineering
Background:
- Neural recording and stimulation systems are crucial for neuroscience research and clinical applications.
- Stimulation artifacts pose a significant challenge, obscuring neural signals and hindering accurate data interpretation.
Purpose of the Study:
- To propose and validate a novel artifact-suppression technique for simultaneous neural recording and stimulation.
- To demonstrate the efficacy of the referenced and tuned push-pull stimulation (RTPPS) scheme in reducing stimulation artifacts.
Main Methods:
- Development of a stimulator chip utilizing a tri-polar electrode and the RTPPS scheme.
- Implementation of complementary stimulation pulses to counteract artifacts at the recording site.
- Fabrication of the prototype stimulator in a 0.18-μm CMOS process.
Main Results:
- Successful in-vivo demonstration of the artifact-suppression technique.
- Significant reduction in stimulation artifact amplitude, measured at 10%-20% of neural spike amplitude.
- Negligible artifact levels achieved, allowing for clearer neural signal observation.
Conclusions:
- The proposed RTPPS scheme effectively suppresses stimulation artifacts in simultaneous neural recording and stimulation systems.
- The developed CMOS chip enables artifact-free neural signal acquisition, advancing the capabilities of neural interfaces.
- This technique offers a promising solution for improving the signal-to-noise ratio in neural monitoring and therapeutic applications.
