Digital technique of circuit´s analyses

Circuit simulation is a powerful tool for circuit design and evaluation, and, over the years, many computer programs have been developed for this purpose. Most of these programs are designed so that the commonly used circuit elements are incorporated within the program, and the user can call them in the circuit file following certain syntax rules and keywords specified by the program designer. However, incorporation of a new element by the user is generally impossible, or only allowed in a limited manner by modification of the model equations of an existing element. This situation reduces the flexibility offered to the user for solving new problems.