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A Mixed-Signal Structured AdEx Neuron for Accelerated Neuromorphic Cores | IEEE Journals & Magazine | IEEE Xplore

A Mixed-Signal Structured AdEx Neuron for Accelerated Neuromorphic Cores


Abstract:

Here, we describe a multicompartment neuron circuit based on the adaptive-exponential I&F (AdEx) model, developed for the second-generation BrainScaleS hardware. Based on...Show More

Abstract:

Here, we describe a multicompartment neuron circuit based on the adaptive-exponential I&F (AdEx) model, developed for the second-generation BrainScaleS hardware. Based on an existing modular leaky integrate-and-fire (LIF) architecture designed in 65-nm CMOS, the circuit features exponential spike generation, neuronal adaptation, intercompartmental connections as well as a conductance-based reset. The design reproduces a diverse set of firing patterns observed in cortical pyramidal neurons. Further, it enables the emulation of sodium and calcium spikes, as well as N-methyl-D-aspartate plateau potentials known from apical and thin dendrites. We characterize the AdEx circuit extensions and exemplify how the interplay between passive and nonlinear active signal processing enhances the computational capabilities of single (but structured) on-chip neurons.
Published in: IEEE Transactions on Biomedical Circuits and Systems ( Volume: 12, Issue: 5, October 2018)
Page(s): 1027 - 1037
Date of Publication: 24 July 2018

ISSN Information:

PubMed ID: 30047897

Funding Agency:


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