User Guide

3
-
14 Usin
g
the PSpice Optimizer
3
In the Edit Specification dialog box, set the controls as
described in Table 3-2
.
Table 3-2
Edit Specification Dialog Box Controls
Control Name Meanin
g
Name Specification name; for a new
specification, double-click <<new>> and
enter a text string that is unique to the
current optimization file.
Reference • Select Internal when defining the
specification’s target value and range in
this dialog box.
• Select External when defining the
specification’s measurement data using
a file (e.g., for curve fitting).
Weight Relative weight of the specification. To
give a specification more weight, assign a
number that is higher than that for the other
specifications.
Enabled When enabled, includes the specification in
the next run. If cleared, excludes the
specification.
Internal Specification
Target
Ideal value for the specification.
Range Delta applied to Target, defining the
acceptable range of values; i.e., Target ±
Range.
Example: If Target=10 and Range=2, then
the PSpice Optimizer accepts values from 9
to 11.
Constraint
When enabled, defines the specification as
a constraint (not a goal).
Type Defines whether constraint values must
equal the target value, be less than or equal
to the target value, or be greater than or
equal to the target value.
External Specification
Fi
g
ure 3-4
Sample Format for
an External Specification
Vbe Ic
4.0E-01 6.05E-06
4.1E-01 8.90E-06
4.2E-02 1.31E-05
X column name
Y column name