A physically-derived nonquasi-static model describing the behavior of the ferroelectric common-drain amplifier is presented. The model is based on the method of partitioned channel and ferroelectric layers and is valid in accumulation, depletion, and the three inversion cases: weak, moderate, and strong. The equations of this model are based on the standard MOSFET equations that have been modified to reflect the ferroelectric properties. The model code is written in MATLAB and outputs voltage plots with respect to time. The accuracy and effectiveness of the model are verified by a few test cases, where the modeled results are compared to empirically-derived oscilloscope plots. (C) 2013 Elsevier Ltd. All rights reserved.