LSI neural chip of pulse-output network with programmable synapse

Shigeo Sato, Manabu Yumine, Takayuki Yama, Junichi Murota, Koji Nakajima, Yasuji Sawada

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


We have fabricated a microchip of a neural circuit with pulse representation. The neuron output is a voltage pulse train. The synapse is a constant current source whose output is proportional to the duty ratio of neuron output. Membrane potential is charged by collection of synaptic currents through a RC circuit, providing an analog operation similar to the biological neural system. We use a 4-bit SRAM as the memory for synaptic weights. The expected I/O characteristics of the neurons and the synapses were measured experimentally. We have also demonstrated the capability of network operation with the use of synaptic weights, for solving the A/D conversion problem.

Original languageEnglish
Pages (from-to)94-100
Number of pages7
JournalIEICE Transactions on Electronics
Issue number1
Publication statusPublished - 1995 Jan 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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