Optical multiply and accumulate unit

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United States of America Patent

PATENT NO 12039433
APP PUB NO 20210264241A1
SERIAL NO

17178563

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Abstract

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Processing elements for neural network accelerators, and methods of operating the processing elements. Each of a plurality of synapse lanes outputs an electrical signal indicative of a value of a synapse. Each electrical signal is received by a respective optical AND unit including an optical microring resonator that selectively couples an optical signal indicative of the value of an input neuron based at least in part on the received electrical signal. The output of each optical AND unit is provided to either an electrical multiply and accumulate unit, or a respective interferometer of a plurality of interferometers. The interferometers are arranged in series so that optical signals are sequentially summed and shifted by each interferometer. The last interferometer outputs a shifted and accumulated sum of the outputs received from the optical AND units. In either case, the accumulated sum may then be used to generate an output neuron.

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Patent Owner(s)

Patent OwnerAddress
OHIO UNIVERSITY340 WEST STATE STREET UNIT 14 ATHENS OH 45701

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Karanth, Avinash Canal Winchester, US 4 21
Shiflett, Kyle Chillicothe, US 2 4

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