User Guide

Phase Three: Runnin
g
an Optimization 2
-17
To chan
g
e the Pc constraint t
y
pe to “
g
reater than
or equal”
1
In PSpice Optimizer, double-click the lower right-hand
corner of the Pc box.
2
In the Edit Specifications dialog box, change Type to >=
target.
3
Click OK.
To run the optimization with the modified
constraint
1
Test performance with the updated constraint:
a
From the Edit menu, select Reset Values.
b
From the Tune menu, select Update Performance.
The Pc constraint is initially violated because the power
dissipation is less than 4 mW.
2
From the Tune menu, select Auto and click Start to start
optimization.
The PSpice Optimizer finds a solution which satisfies both
the goal (current of 1 mA) and the constraint (power
dissipated in the resistor greater than 4 mW). Figure 2-8
shows the results.
Fi
g
ure 2-8
Results after Changing the Constraint Type
double-click here