Live demonstration: A multi-channel ECoG acquisition SoC for real-time seizure detection

This work demonstrates a system-on-chip circuitry for epileptic seizure detection. The circuitry contains a modified OpenRISC1200 processor core with on-chip Wishbone bus and interfaces circuitries, embedded 48KB SRAM, a multi-mode Sigma-Delta modulator and its digital filter, 7 pre-amplifiers and an analog multiplexer. The size of proposed circuitry is 2994 μm by 2994 μm, which was fabricated in TSMC 0.18μm CMOS technology. The maximum operation frequency of designed SoC is 100 MHz. The fabricated SoC was mounted on a costumed printed circuit board (PCB) for functional and performance evaluation. The circuitry and PCB was then programed absent seizure detection algorithm and apply to a Long-Evans rat with absent seizure to verify its real time performance.