A micro-power EEG acquisition SoC with integrated seizure detection processor for continuous patient monitoring

Naveen Verma, Ali Shoeb, John V. Guttag, Anantha P. Chandrakasan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

31 Scopus citations

Abstract

Continuous on-scalp EEG monitoring provides a non-invasive means to detect the onset of seizures in epilepsy patients, but cables from the scalp pose a severe strangulation hazard during convulsions. Since the power of transmitting the EEG wirelessly is prohibitive, a complete SoC is presented, performing lowpower EEG acquisition, digitization, and local digital-processing to extract detection features, reducing the transmission-rate by 43x. To maximize power-efficiency, the acquisition LNA operates at the lowest reported VDD (of 1V, drawing 3.5μW), but is able to reject offsets (characteristic of metal-electrodes) that are even larger than the supply voltage. Importantly, its topology simultaneously optimizes noise-efficiency and input-impedance to maximize electrode signal-integrity, and it uses switch-capacitor transformers to improve the noise and manufactureabilty of large on-chip resistors. The complete SoC generates EEG featurevectors every 2sec, consuming a total of 9μJ per feature-vector.

Original languageEnglish (US)
Title of host publication2009 Symposium on VLSI Circuits
Pages62-63
Number of pages2
StatePublished - Nov 18 2009
Externally publishedYes
Event2009 Symposium on VLSI Circuits - Kyoto, Japan
Duration: Jun 16 2009Jun 18 2009

Publication series

NameIEEE Symposium on VLSI Circuits, Digest of Technical Papers

Other

Other2009 Symposium on VLSI Circuits
CountryJapan
CityKyoto
Period6/16/096/18/09

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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