Publication

A 64-Channel, Low-Power End-to-End Transformer-Based BCI SoC for Efficient Motion Intention Decoding

2026

Abstract

Real-time brain-computer interfaces (BCIs) demand fully on-chip neural decoding with tight power, area, and latency budgets. This work presents the first fully-integrated transformer-based BCI SoC that performs energy-efficient motion intention decoding from ECoG signals. The chip integrates a 64-channel analog front-end (AFE) and a distilled, light-weight transformer-based decoder featuring customized 7T-SRAM computing-in-memory (CIM) macros with hybrid sign-magnitude and two's-complement (SM-2C) computation. Fabricated in 65nm, the decoder achieves a 67.8% accuracy on a 6-class upper-limb motion-intention dataset, consuming 47μW in 4.7mm2, while the complete SoC occupies 10.1mm2.

Official source

https://infoscience.epfl.ch/entities/publication/eef560d7-95b0-4999-baae-afd3c0ead4e0

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2026

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/eef560d7-95b0-4999-baae-afd3c0ead4e0

About this result

Related concepts (16)

Brain–computer interface

A brain–computer interface (BCI), sometimes called a brain–machine interface (BMI) or smartbrain, is a direct communication pathway between the brain's electrical activity and an external device, most commonly a computer or robotic limb. BCIs are often directed at researching, mapping, assisting, augmenting, or repairing human cognitive or sensory-motor functions. They are often conceptualized as a human–machine interface that skips the intermediary component of the physical movement of body parts, although they also raise the possibility of the erasure of the discreteness of brain and machine.

User interface

In the industrial design field of human–computer interaction, a user interface (UI) is the space where interactions between humans and machines occur. The goal of this interaction is to allow effective operation and control of the machine from the human end, while the machine simultaneously feeds back information that aids the operators' decision-making process. Examples of this broad concept of user interfaces include the interactive aspects of computer operating systems, hand tools, heavy machinery operator controls and process controls.

Human–computer interaction

Human–computer interaction (HCI) is research in the design and the use of computer technology, which focuses on the interfaces between people (users) and computers. HCI researchers observe the ways humans interact with computers and design technologies that allow humans to interact with computers in novel ways. A device that allows interaction between human being and a computer is known as a "Human-computer Interface (HCI)".