Modified Methods of Circuit Simulation of Radio Engineering Devices in The Time Domain

Abstract

Today, different modeling methods are used for computer analysis of circuits of radio engineering devices (RED) in the time and frequency domains. The article provides a comparison and highlights the features of using the methods of nodal potentials and variable states. Developed methods of optimization of electrical circuits and discusses the possibility of calculating the margin of stability when changing the parameters of the circuit elements and the search of critical parameter values; theoretically and experimentally confirmed the advantages of using MEAs in the analysis of RED; proposed and implemented ways to eliminate the major disadvantages of the IPU; expanded and improved methods for obtaining the mathematical model of the circuit; the mathematical method allows to obtain the characteristic polynomial of a circuit without calculating its transfer function; the developed block for processing parameters of electrical circuit elements using scaling coefficients can significantly improve the accuracy of calculations; the use of speed-optimized algorithms makes it possible to analyze fairly complex circuits on a medium-performance PC. Developed software allows to analyze a wide class of linear, linearized, and nonlinear circuits for the RED, containing the active elements. The analysis of real electrical circuits proves the validity of all the proposed methods.