# 9.9 A Background-Noise and Process-Variation-Tolerant 109nW Acoustic Feature Extractor Based on Spike-Domain Divisive-Energy Normalization for an Always-On Keyword Spotting Device

> Research article (2021 IEEE International Solid- State Circuits Conference (ISSCC), 2021) · cited 45× · AI/ML

**Wikidata**: [openalex:W3135783778](https://www.wikidata.org/wiki/openalex:W3135783778)  
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