User Guide

The Bipolar Transistor Test Case 8
-7
Mappin
g
s to the external data file
Note the
reference to the external data file,
3055.mdp, and the values
assigned to X Column Name and Y Column Name. The column
values map to the column names defined in
3055.mdp, such
that the X column gives the data points at which the Y column
values were measured. For the BJT example, the Y column
contains measured collector current corresponding to the
specified base-emitter voltages in the X column.
The evaluations
To measure performance, both goals use
the Probe goal function, YatX (see The Evaluations
on
page 7-4). Notice the ‘!’ character appearing in the expression.
This character allows Probe to make measurements at the
multiple X column values.
When the PSpice Optimizer encounters this character, it
replaces it with the current X column value before sending it to
Probe for evaluation.