A wafer scale integration neural network utilizing completely digital circuits

A wafer scale integration (WSI) neural network utilizing completely digital circuits is reported. Three new technologies are used: (1) time-sharing digital bus; (2) efficient utilization of weight storage; and (3) redundant learning control circuit. Items 1 and 2 enable more than 500 neurons and effectively more than 30000 synapses to be fabricated on a 5-in silicon wafer. Item 3 enables a very high yield to be realized on one silicon wafer using a 0.8 mu m CMOS process.<
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