Sun-Il Chang

Title: Sun-Il Chang: Innovator in Neural Interface Technology

Introduction

Sun-Il Chang is a prominent inventor based in Ann Arbor, MI (US), known for his groundbreaking work in neural interface technology. With a total of 4 patents, Chang has made significant contributions to the field of neuroscience and biomedical engineering.

Latest Patents

Chang's latest patents include a "Distributed, minimally-invasive neural interface for wireless epidural recording." This innovative neural interface is designed for measuring or stimulating brain neural activity, either as a standalone unit or as part of a larger system of similar interfaces. The device features a bolt-shaped housing with a tool-engaging head and threaded shank, which contains internal circuitry and at least one electrode. When in use, the housing is threaded into a cranial bore, allowing the electrode to contact the outer surface of the meninges. The circuitry includes an SAR ADC that enables rail-to-rail operation, converting signals from the electrode(s) into digital data that can be wirelessly transmitted.

Another notable patent is the "Bioamplifier for neural interfaces." This bioamplifier incorporates a high pass filter, open-loop amplifier, and low pass filter in a compact design suitable for implantable neural interfaces. The high pass filter is implemented using a switch-capacitance resistor coupled with the parasitic capacitance of the electrode. The amplifier is chopper stabilized and features a high gain, current-ratio first stage followed by additional dimension-ratio stages. The low pass filter utilizes the output impedance of the open-loop amplifier to create an embedded g-C low pass filter.

Career Highlights

Throughout his career, Sun-Il Chang has worked with esteemed institutions such as the University of Michigan and the Korea Institute of Science and Technology. His work has significantly advanced the understanding and application of neural interfaces in medical technology.

Collaborations

Chang has collaborated with notable colleagues, including Euisik Yoon and Sungchul Kang, contributing to the development of innovative solutions in the field of neural interfaces.

Conclusion

Sun-Il Chang's contributions to neural interface technology exemplify the impact of innovation in the medical field. His patents and collaborations continue to pave the way for advancements in understanding and interacting with the human brain.