Sensitivity analysis of analog circuits based on a modified nodal approach

The paper presents an improvement of sensitivity analysis methods of analog lumped circuits. A practical and reliable approach has been developed and implemented in a computation program intended for linear and/or piecewise-linear approximation of the nonlinear RLCM circuits containing any type of passive elements, independent and controlled sources. A powerful modified nodal approach to build the mathematical model combined with some symbolic computation strategies has been exploited, in order to reduce the computational effort and to minimize the numerical errors. The developed software tool is conceived as a useful and valuable support for research and design engineers.