User Guide

3
-
28 Usin
g
the PSpice Optimizer
•
If you are not using MicroSim TextEdit, use the Print
command for the text editor showing the report.
Viewin
g
the Optimization Lo
g
The PSpice Optimizer automatically creates an audit trail of
optimization progress and saves the information to a file named
design_name .olg. You can use this file as a debugging tool
when an optimization fails to converge.
To view the optimization lo
g
file
1
Activate Notepad or another text editor.
2
Open the log file for browsing.
Viewin
g
Derivatives
You can display a matrix showing the most recent derivative
data the PSpice Optimizer uses to calculate performance.
To displa
y
the derivative data
1
From the Tune menu, select Show Derivatives.
Each entry in the matrix represents the partial derivative of
one specification (the row label) with respect to one active
parameter (the column heading). If a specification is
completely independent of a parameter, the derivative is
zero.
2
When finished, click Close.
Fi
g
ure 3-6
Sample Excerpt
from a Lo
g
File
Fi
g
ure 3-7
Sample Derivative
Data