Neuron circuit and method

Abstract

A spike domain asynchronous neuron circuit includes a first spike to exponential circuit for emulating kinetic dynamics at a neuron input and converting voltage spikes into exponentials, a first adjustable gain circuit for emulating homeostatic plasticity coupled to the first voltage-type spike exponential output and having a first current output, a neuron core circuit coupled to the first current output for emulating a neuron core and having a spike encoded voltage output, a filter and comparator circuit coupled to the spike encoded voltage output and having a gain control output coupled to the first adjustable gain circuit for controlling a gain of the first adjustable gain circuit, and an adjustable delay circuit for emulating an axonal delay coupled to the spike encoded voltage output and having an axonal delay output.

Description

[0001] Cross References to Related Applications [0002] This application is related to and claims the benefit of US Provisional Patent Application No. 61 / 675,736, filed July 25, 2012, the entire disclosure of which is hereby incorporated herein. [0003] Statement on Federal Funds [0004] This invention was made with support under US Government contract HRL0011-09-C-0001. The US Government has certain rights in this invention. technical field [0005] The present disclosure relates to neural processing, and more particularly to neuronal circuits. More specifically, the present disclosure relates to spike domain neuronal circuits with programmable kinetic dynamics, homeostatic plasticity, and axonal delay. Background technique [0006] The human brain consists of about 10 11 neurons and 10 15 a synapse. The neurons, synapses, and their networks that form the human brain are very complex biological systems. Figure 1A A simplified diagram of a biological neuron is show...

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Problems solved by technology

However, this circuit requires two capacitors for each delay stage

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