The interface between the human brain and the digital world has evolved dramatically — from punch cards and keyboards to touchscreens and, more recently, natural language driven by large language models. At its core, this evolution reflects an ongoing effort to reduce friction between the biological brain and computational systems. Establishing a direct, high-bandwidth communication channel between the brain and the digital world has become one of the defining challenges of the 21st century.

Invasive brain-computer interfaces (BCIs) represent the most direct approach to this goal, and have achieved remarkable progress in recent years. Custom integrated circuits — fabricated at the millimeter scale and consuming milliwatts or less — are central to this progress. By integrating neural recording, signal processing, and wireless communication on a single chip, these systems eliminate the bulk and power constraints of conventional instrumentation, making implantable BCIs safer, more comfortable, and clinically practical.

This page presents an overview of the key circuit modules in invasive BCI chip design, intended as a resource for researchers and students entering the field.

How to Cite

@book{yangjie_bci_2024,
  title     = {Invasive Brain-Computer Interface Chip Design},
  author    = {Jie Yang and Mohamad Sawan},
  note      = {\url{https://yangjie.ac.cn/book-item-bci_en.html}},
  year      = {2024}
}