A 65k-neuron 73-Mevents/s 22-pJ/event asynchronous micro-pipelined integrate-and-fire array transceiver

Jongkil Park, Sohmyung Ha, Theodore Yu, Emre Neftci, Gert Cauwenberghs

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We present a 65k-neuron integrate-and-fire array transceiver (IFAT) for spike-based neural computation with low-power, high-throughput connectivity. The internally analog, externally digital chip is fabricated on a 4×4 mm2 die in 90nm CMOS and arranged in 4 quadrants of 16k parallel addressable neurons. Each neuron circuit serves input spike events by dynamically instantiating conductance-based synapses onto four local synapse circuits over two membrane compartments, and produces output spike events upon reaching a threshold in integration over one of the membrane compartments. Fully asynchronous input and output spike event data streams are mediated over the standard address event representation (AER) protocol. To support full event throughput at large synaptic fan-in, a two-tier micro-pipelining scheme parallelizes input events along neural array cores, and along rows of each core. Measured results show sustained peak synaptic event throughput of 18.2 Mevents/s per quadrant, at 22 pJ average energy per synaptic input event and 25 μW standby power.

Original languageEnglish (US)
Title of host publicationIEEE 2014 Biomedical Circuits and Systems Conference, BioCAS 2014 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages675-678
Number of pages4
ISBN (Electronic)9781479923465
DOIs
StatePublished - Dec 9 2014
Event10th IEEE Biomedical Circuits and Systems Conference, BioCAS 2014 - Lausanne, Switzerland
Duration: Oct 22 2014Oct 24 2014

Publication series

NameIEEE 2014 Biomedical Circuits and Systems Conference, BioCAS 2014 - Proceedings

Other

Other10th IEEE Biomedical Circuits and Systems Conference, BioCAS 2014
CountrySwitzerland
CityLausanne
Period10/22/1410/24/14

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ASJC Scopus subject areas

  • Hardware and Architecture
  • Biomedical Engineering

Cite this

Park, J., Ha, S., Yu, T., Neftci, E., & Cauwenberghs, G. (2014). A 65k-neuron 73-Mevents/s 22-pJ/event asynchronous micro-pipelined integrate-and-fire array transceiver. In IEEE 2014 Biomedical Circuits and Systems Conference, BioCAS 2014 - Proceedings (pp. 675-678). [6981816] (IEEE 2014 Biomedical Circuits and Systems Conference, BioCAS 2014 - Proceedings). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/BioCAS.2014.6981816