A $1.5 mu mathrm{W}$ End-to-End Keyword Spotting SoC with Content-Adaptive Frame Sub-Sampling and Fast-Settling Analog Frontend. - Ji-Hwan SeoI; Heejin Yang; Rohit Rothe; Zichen Fan; Qirui Zhang 001; Hun-Seok Kim; David T. Blaauw; Dennis Sylvester (ISSCC, 2023)