SPICE model of a real capacitor : Capacitive feature analysis with voltage variation

As it is known the passive components like the resistor, the coil and the capacitor in reality are not ideal components and have a nonlinear component. In this paper is started from the real equivalent circuit of a capacitor and is created a nonlinear SPICE model whose static capacity varies with voltage. The correctness of the SPICE model is studied on the capacitive region of the capacitor. Also, a study of the behavior of the SPICE model without considering the variation with temperature, aging, ESL and ESR will be presented. All to be considered in a future paper. The behavior of the SPICE model is compared with the behavior of the real capacitor and with the SPICE behavior of the capacitor proposed by the component manufacturer.