A Power-Efficient Oscillatory Synchronization Feature Extractor for Closed-Loop Neuromodulation

Journal article (2024)

Authors

H. Yassin Aswan University
A. Akhoundi Bio-Electronics - EEMCS
El Sayed Hasaneen Aswan University
D.G. Muratore Bio-Electronics - EEMCS
Research Group
Bio-Electronics (EEMCS) (TU Delft)
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Published Date

2024

Language

English

Reuse Rights

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Bio-Electronics

Abstract

This brief presents a low-power oscillatory synchronization feature extraction (FE) unit for phase-amplitude coupling (PAC) and phase locking value (PLV) features. The proposed FE unit uses a new multiplier-less wavelet approximation in combination with a multi-rate lowpass filter bank for low-power complex signal extraction. Further power and area reductions are obtained by utilizing a light sine and cosine extractor (LSCE) for the feature computation. The synthesized 32-channel design achieves state-of-the-art performances in post-layout simulations at 430 nW/channel and 0.36 mm2 while maintaining sufficient accuracy for seizure detection in epileptic patients.

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