A desktop-computer-based calculation of high-frequency MOS C-V curves

A Simple desktop-computer-based technique for the calculation of the curves of MOS capacitors is presented. The equivalent circuit model for low- and high-frequency semiconductor capacitance and, in the latter case, both with and without minority carriers, has been investigated. The computer simulation of the equivalent circuit model revealed that the curves for both the exact high frequency and the high frequency without minority carriers are essentially the same. An analytical calculation of the low-frequency curve has been performed and plotted for a direct comparison with the computer simulation by the equivalent circuit model. Application of this technique will allow both high-frequency MOS measurements and calculated theoretical high-frequency curves to be displayed and plotted on the same desktop computer system(s). A complete model for each case and a detailed explanation of programming steps are also discussed.