Reproduce “SPAIC: A sub-$μ$W/Channel, 16-Channel General-Purpose Event-Based Analog Front-End with Dual-Mode Encoders” on OpenResearch
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About this paper
Shyam Narayanan, Matteo Cartiglia, Arianna Rubino, Charles Lego, Charlotte Frenkel, Giacomo Indiveri
Researchers from the University of Zurich and ETH Zurich developed SPAIC, a 16-channel general-purpose analog front-end chip. This chip converts analog sensor signals into event-based spike trains using dual-mode Delta Modulation and Pulse-Frequency Modulation encoders, featuring sub-µW/channel power consumption and a programmable operating range from below 100 Hz to 100 kHz.
Key insights
- Integrating both Delta Modulation and Pulse-Frequency Modulation encoding schemes into a single chip provides broad flexibility for converting diverse analog signal characteristics into event-based spikes.
- Achieving a highly tunable frequency response, spanning four orders of magnitude (100 Hz to 100 kHz), allows the AFE to adapt to a wide array of applications without requiring hardware redesign.
- Employing a configurable four-stage pipeline (LNA, BPF, PGA, encoder) per channel enables comprehensive signal conditioning and amplification tailored to specific input requirements before spike generation.
Summary by alphaXiv.
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