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In Frontiers in computational neuroscience

Modern machine learning is based on powerful algorithms running on digital computing platforms and there is great interest in accelerating the learning process and making it more energy efficient. In this paper we present a fully autonomous probabilistic circuit for fast and efficient learning that makes no use of digital computing. Specifically we use SPICE simulations to demonstrate a clockless autonomous circuit where the required synaptic weights are read out in the form of analog voltages. This allows us to demonstrate a circuit that can be built with existing technology to emulate the Boltzmann machine learning algorithm based on gradient optimization of the maximum likelihood function. Such autonomous circuits could be particularly of interest as standalone learning devices in the context of mobile and edge computing.

Kaiser Jan, Faria Rafatul, Camsari Kerem Y, Datta Supriyo

2020

Boltzmann machine algorithm, analog circuit, machine learning, magnetic tunnel junction (MTJ), on-device learning, probabilistic computing