Computer Simulation of Dynamic Processes in Electronic Systems

The numerical simulation of electronic devices is associated with the solution of stiff differential-algebraic equations systems. An important factor in effective numerical simulation is the count of calculations of the Jacobi matrix, as well as ensuring the necessary accuracy of calculations without the need for a significant reduction in the integration step.This article presents a model of a ring modulator in the SimInTech software package. A comparative analysis of the effectiveness of explicit adaptive methods and Diagonally Implicit Runge–Kutta methods implemented in the software systems SimInTech and LISMA has been carried out.It is concluded that the DIRK4 method in SimInTech is effective on the example of essentially stiff problems that arise when modeling electronic devices. Compared to the Gear method (in the SimInTech version), the DIRK4 method has almost 3 times fewer decompositions of the Jacobi matrix, which has a good effect on performance with an increase in the system dimension.