A Non-linear Input Converter Inversely Pre-distorted Against Nonlinear Behavior of FG-based Neuromorphic Synaptic Devices

Abstract

In this paper, we propose a non-linear input converter inversely pre-distorted. In terms of the cell of FG-based neuromorphic synaptic devices, MOSFET read current of nonlinearity problem is caused by two individual inputs(FG weight input voltage). Against non-linear convex output current, concave I-V characteristics of common source amp attributed to its high order terms in low input voltage region improves nonlinearity. To show how much linearizing the nonlinear convex curve of read current, we compare coefficient of determination(R2) of conventional cell, additional cap between FG and Drain of MOSFET in the cell and proposed distorted input amp to cell individually. Briefly, linearity factor(R2) of this work shows 0.99 and this value closes to 1 than other cases. © 2021 IEEE.