User Guide

2
-
18 Primer: How to Optimize a Desi
g
n
Usin
g
Standard Component
Values
When an optimization completes successfully, the optimizer
displays the new parameter values in the PSpice Optimizer
window. However, each calculated value might not correspond
to an actual value that is available with off-the-shelf
components. For example, resistors are not readily available in
all possible values.
You can use the PSpice Optimizer to select standard component
values. The optimizer either:
• rounds to the nearest value, or
• computes values based on the most recent optimization run.
To round to the nearest standard component
value
1
From the Edit menu, select Round Nearest.
R1val’s current value changes to 3.9 k in accordance with
the specified 10% tolerance.
Producin
g
Reports
You can use the PSpice Optimizer to generate a report
summarizing:
• current settings for parameter, specification, and program
options.
• calculated derivatives and Lagrange multipliers.
To
g
enerate a summar
y
report
1
From the File menu, select Report.
The PSpice Optimizer writes the final results to
mydiode.oot as shown in Figure 2-9.
See Using Standard Component
Values on page 3-29 for more
information, includin
g
how the
PSpice Optimizer uses
tolerances and limits when
standardizin
g
values.
rounded resistor value