Simulating voltage dependent reactance with SPICE
FU Wen-xiu · Journal of Changchun Post and Telecommunication Institute · 2002
The method of simulating the voltage dependent reactance with SPICE is discussed. The electronic element, in which the equivalent reactance changes with voltage, called voltage dependent reactance, the value of reactance is a function of their conduct voltage and current. SPICE program has not provided library models for the voltage dependent reactance. A method with which a nonlinear voltage dependent capacitance can be specified by using a data table, or a polynomial is presnted. By studing the characteristic for varactor, a method of creating SPICE macromodel is provided. It is a good solution for simulating voltage controlled oscillator with varator model. The method of modeling voltage dependent reactance derived is also effective for simulating voltage dependent oscillator in practice.