Analog hardware implementation of spike-based delayed feedback reservoir computing system

Abstract

The rate of enhancement is starting to saturate and slow down which indicates the end of Moore's prediction due to the fundamental performance limits of the chips. The need of breaking through the barrier has directed researchers into several directions, for instance, novel computing architecture. Reservoir computing, a novel concept in the field of machine learning, has emerged over the past few years. Combined the memory and spatio-temporal processing of recurrent neural networks, reservoir computing possesses the capability of processing temporal information. In this paper, we present an analog hardware implementation of delayed feedback reservoir computing system. We build a new class of computationally efficient spike timing-dependent encoders and delay-based reservoirs within reservoir networks. This approach allows us to avoid using power-consuming analog-to-digital converters (ADCs) and operational amplifiers (Op-AMPs), resulting in significant savings in power requirements and design area.