KIP publications

year 2018
author(s) Syed Ahmed Aamir, Paul Müller, Gerd Kiene, Laura Kriener, Yannik Stradmann, Andreas Grübl, Johannes Schemmel and Karlheinz Meier
title A Mixed-Signal Structured AdEx Neuron for Accelerated Neuromorphic Cores
KIP-Nummer HD-KIP 18-39
KIP-Gruppe(n) F9
document type Paper
Keywords (shown) Analog integrated circuits, Neuromorphic, Leaky, Integrate-and-Fire, 65 nm CMOS, Spiking, Bursting, Neuron, Adaptation, Exponential, LIF, AdEx, Multi-compartment, Dendrites, NMDA
source IEEE Transactions on Biomedical Circuits and Systems
Abstract (en)

Here we describe a multi-compartment 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, inter-compartmental connections as well as aconductance-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 (NMDA) plateau potentials known from apical and thin dendrites. We characterize the AdEx circuit extensions and exemplify how the interplay between passive and non-linear active signal processing enhances the computational capabilities of single (but structured) on-chip neurons.

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URL arXiv pre-print
URL pdf
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