User Guide

Chapter 12 Monte Carlo and sensitivity/worst-case analyses
306
Worst-case analysis
This section discusses the analog worst-case analysis
feature of PSpice. The information provided in this section
explains how to use worst-case analysis properly and with
realistic expectations.
Overview of worst-case analysis
Worst-case analysis is used to find the worst probable
output of a circuit or system given the restricted variance
of its parameters. For instance, if the values of R1, R2, and
R3 can vary by +
10%, then the worst-case analysis
attempts to find the combination of possible resistor
values which result in the worst simulated output. As
with any other analysis, there are three important parts:
inputs, procedure, and outputs.
Figure 83 Center frequency histogram.
Pspug.book Page 306 Wednesday, November 11, 1998 1:14 PM