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

Tsan Jieh Chen*, Sheng Cheng Lee, Her-Ming Chiueh

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

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 as shown in Fig. 1(a), which was fabricated in TSMC 0.18um 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 as shown in Fig. 1(b). The circuitry and PCB was then programed absent seizure detection algorithm proposed in [1], [2] and apply to a Long-Evans rat with absent seizure to verify its real time performance. The experimental setup is shown in Fig 1(c). The designed SoC runs the seizure detection program in a closed-loop mode to detect 7-channel ECoG signals at 50 MHz, or 2-channel ECoG signals at 12.5 MHz. The designed SoC can also runs at an interactive mode to provide real-time interaction with LabView based GUI on a laptop computer for recording or additional real-time signal processing on the connected computer. The corresponding utility and programing environment for the designed SoC are also presented in the real-time seizure detection experiment shown in Fig. 1(c).

Original languageEnglish
Title of host publication2012 IEEE Biomedical Circuits and Systems Conference
Subtitle of host publicationIntelligent Biomedical Electronics and Systems for Better Life and Better Environment, BioCAS 2012 - Conference Publications
Number of pages1
DOIs
StatePublished - 1 Dec 2012
Event2012 IEEE Biomedical Circuits and Systems Conference: Intelligent Biomedical Electronics and Systems for Better Life and Better Environment, BioCAS 2012 - Hsinchu, Taiwan
Duration: 28 Nov 201230 Nov 2012

Publication series

Name2012 IEEE Biomedical Circuits and Systems Conference: Intelligent Biomedical Electronics and Systems for Better Life and Better Environment, BioCAS 2012 - Conference Publications

Conference

Conference2012 IEEE Biomedical Circuits and Systems Conference: Intelligent Biomedical Electronics and Systems for Better Life and Better Environment, BioCAS 2012
CountryTaiwan
CityHsinchu
Period28/11/1230/11/12

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