NEUROMORPHIC COMPUTATIONAL SYSTEM(S) USING RESISTIVE SYNAPTIC DEVICES

摘要

Neuromorphic computational circuitry is disclosed that includes a cross point resistive network and line control circuitry. The cross point resistive network includes variable resistive units. One set of the variable resistive units is configured to generate a correction line current on a conductive line while other sets of the variable resistive units generate resultant line currents on other conductive lines. The line control circuitry is configured to receive the line currents from the conductive lines and generate digital vector values. Each of the digital vector values is provided in accordance with a difference between the current level of a corresponding resultant line current and a current level of the correction line current. In this manner, the digital vector values are corrected by the current level of the correction line current in order to reduce errors resulting from finite on to off conductance state ratios.

主权项

1. Computational circuitry, comprising:
a cross point resistive network comprising a set of conductive lines and variable resistive units comprises a first set of the variable resistive units coupled to a first conductive line of the set of conductive lines and other sets of the variable resistive units each coupled to a corresponding conductive line of the set of conductive lines, wherein the first set of the variable resistive units is configured to generate a correction line current on the first conductive line and the other sets of the variable resistive units are configured to generate resultant line currents such that each of the other sets of the variable resistive units generates a different one of the resultant line currents on the corresponding conductive line; and line control circuitry coupled to receive the correction line current and the resultant line currents from the set of conductive lines, wherein the line control circuitry is configured to generate digital vector values such that each of the digital vector values is set in accordance with a difference between a current level of a corresponding resultant line current of the resultant line currents and a current level of the correction line current.