ABSTRACT
This chapter introduces the statistical analyses available in PSpice. There are two analyses: the first is sensitivity and worst-case, and the second is Monte Carlo analysis. The chapter also provides worrked examples of amplifier and filter circuits to illustrate the use of both analyses. Before explaining how PSpice performs the statistical analyses, it is necessary to introduce some basic definitions and show, for example, how they are used to calculate the sensitivity of a circuit. The prime purpose of sensitivity and worst-case analyses is to identify the most critical components of a circuit. During sensitivity analysis, components are varied one at a time, and an analysis is obtained for each variation. This means that sensitivity analysis allows PSpice to find the sensitivity of the circuit output to each component. After each component has been varied, a worst-case analysis is done with all components varied to give the worst-case output.
