Efficient method to treat parameters´ uncertainties in complex circuits

In the present work we study the treatment of parameters´ uncertainties in complex circuits, i.e. composed by lumped and distributed elements. These problems are usually treated by the use of Monte Carlo techniques, which are extremely time consuming. A simple procedure for the calculation of the upper and lower limit of the response is defined by using the wavelet expansion in time domain. When only a part of the circuit is affected by uncertainties we use the Thevenin´s equivalent in the wavelet domain (straightforwardly evaluated) to further reduce the analysis´ complexity