Precise tuning for programming analog neural memory in deep learning artificial neural networks

Abstract

To provide a precision tuning algorithm and device for precisely and rapidly depositing a precise amount of charge on a flowing gate of a nonvolatile memory cell within a vector multiplication (VMM) array in an artificial neural network.SOLUTION: A method for reading a selected nonvolatile memory cell that stores one of N (integers greater than 2) possible values includes the steps of: applying digital input pulses to the selected nonvolatile memory cell; and determining a value stored in the selected nonvolatile memory cell based on the output of the nonvolatile memory cell selected according to each of the digital input pulses.EFFECT: The selected cell can be programmed with great precision to hold one of the N different values.SELECTED DRAWING: Figure 26