User Guide

File and Pro
g
ram Relationships B
-5
Definin
g
Specification Criteria in
the External Data File
The external data file contains the measured data used in the
optimization (e.g., when fitting data to model parameters). Data
is formatted as labeled columns of values.
Typically, the first column contains the independent values at
which all other data was measured; this corresponds to the
X Column Name in the optimizer’s Edit Specification dialog
box. All other columns contain the dependent measured values
and correspond to the Y Column Name in the dialog box.
To set up an external file
Using a standard text editor:
1
On line 1, enter the column headings for the data separated
by spaces or tabs.
2
On all lines following line 1:
a
Enter data values that correspond to the column
headings, separated by spaces or tabs.
b
Sort the lines of data in ascending X Column Name
order.
3
Save the file using any file extension that does not conflict
with other MicroSim standard file extensions. We
recommend using the naming convention
design_name .mdp.
For an example of an optimization that uses an external data file,
see Chapter 8,
Tutorial: Fitting Model Data (Bipolar
Transistor).
Vbe Ic Ib
4.000E-01 6.047E-06 2.655E-06
4.100E-01 8.900E-06 3.253E-06
4.200E-01 1.310E-05 3.989E-06
4.300E-01 1.928E-05 4.897E-06
•
•
•
8.100E-01 8.002E+00 1.922E-01
8.200E-01 9.092E+00 2.371E-01
Fi
g
ure B-1
Sample External Data File