User`s guide

Analyses You Can Run with PSpice A/D 1
-7
Monte Carlo and sensitivit
y
/worst-case
Monte Carlo and sensitivity/worst-case analyses are statistical.
PSpice A/D changes device model parameter values with
respect to device and lot tolerances that you specify, and runs a
simulation for each value.
Table 1-5
summarizes how PSpice A/D runs each statistical
analysis type.
Table 1-5
Statistical Analysis Types
For this
statistical
analysis...
PSpice A/D does this...
Monte Carlo For each simulation,
randomly
varies all
device model parameters for which you
have defined a tolerance.
Sensitivity/
worst-case
Computes the probable worst-case response
of the circuit in two steps:
1
Computes component sensitivity to
changes in the device model parameters.
This means PSpice A/D
nonrandomly
varies device model parameters for
which you have defined a tolerance, one
at a time for each device and runs a
simulation with each change.
2
Sets
all
model parameters for
all
devices to their worst-case values
(assumed to be at one of the tolerance
limits) and runs a final simulation.
not
included
in: