Analysis of electric circuits is necessary not only for computing of circuit properties but also understanding their principles. The computer methods are a powerful tool for symbolic analysis of circuit parameters. But it is considering as this tools. Thanks to its clarity, the graphic method is extremely suitable even for understand of these networks. A clearly arranged set of the transformation graphs derived for different types of the switching circuits can be used for analyzing switched networks and for understand of course, too. The M-C signal flow graphs are used to the design and analysis continuous time circuits and periodically switched linear circuits, too. The transformation graphs and the two-graphs are commonly used for assembly the final matrix considering all phases to solving electronics circuits and matrix is calculated by algebraic minors. It means this method is combination graph and numerical methods, booth. But solving is possible by graphs only in selected circuits, as is described follows for circuit which contain switched capacitors and switched current, too.

Dr. Brtnik was born in Jihlava, Czechoslovakia, 1959. He received the PhD. degree in communication engineering and electronic at the BUT of Brno, Czech Republic, in 1998. He joined the Department of the Electronics and Informatics of the College of Polytechnics Jihlava as Assistant Professor. His research fields is theory of electronics circuits.