A 65nm 36nJ/Decision Bio-inspired Temporal-Sparsity-Aware Digital Keyword Spotting IC with 0.6V Near-Threshold SRAM
CoRR(2024)
摘要
This paper introduces, to the best of the authors' knowledge, the first
fine-grained temporal sparsity-aware keyword spotting (KWS) IC leveraging
temporal similarities between neighboring feature vectors extracted from input
frames and network hidden states, eliminating unnecessary operations and memory
accesses. This KWS IC, featuring a bio-inspired delta-gated recurrent neural
network (ΔRNN) classifier, achieves an 11-class Google Speech Command
Dataset (GSCD) KWS accuracy of 90.5
At 87
reduced by 2.4×/3.4×, respectively. The 65nm design occupies
0.78mm^2 and features two additional blocks, a compact 0.084mm^2 digital
infinite-impulse-response (IIR)-based band-pass filter (BPF) audio feature
extractor (FEx) and a 24kB 0.6V near-Vth weight SRAM with 6.6× lower
read power compared to the standard SRAM.
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