Summation Characteristics of PDM Digital Neural Network System

A PDM (Pulse Density Modulating) digital neural network system, which consists of 1,000 neurons physically interconnected by one million 7-bit synapses, was developed in our laboratory. One of the key features that makes it possible to develop such a large system is in the spatial summation taken place in dendrite circuits, where output pulses from synaptic circuits are summed by OR gates. In this paper, spatial summation characteristics of the system are investigated and it will be shown that although the summation is probabilistic by nature, precision of computation is very high. Several methods for improving the accuracy will also be discussed.

• Type: Conference
• Year: 1998
• Where: ICONIP
• Authors: Hideki Toda, Yuzo Hirai
• Keywords: ICONIP 1998, ICONIP 2007, Spatial Summation, Spatial Summation Characteristics, Summation Taken Place