User Guide

Using the Model Editor to edit models
107
To change the values for Junction Capacitance and
Reverse Leakage
1 Follow the same steps as for Forward Current,
entering the data sheet information listed in Table 1
that corresponds to the current model characteristic.
To change the Reverse Breakdown characteristic
1 In the Spec Editing frame, click the Reverse
Breakdown tab.
This tab requires single-valued data.
2 In the Vz text box, type
7.5.
3 Press F to move to the Iz text box, and then type
20m.
4 Press F to move to the Zz text box, and then type
5.
Extracting model parameters
To generate new model parameter values
1 From the Tools menu, choose Extract Parameters.
A check mark appears in the Active column of the
Parameters frame for each extracted model parameter.
To display the curves for the five diode characteristics
1 From the Window menu, choose Tile.
Some of the plots are shown in Figure 32 below.
T
h
e Mo
d
e
l
E
d
itor accepts t
h
e same sca
l
e
factors normally accepted by PSpice.
You can a
l
so
d
o t
h
e
f
o
ll
owing wit
h
an active
plot window:
• Pan and zoom within the plot using
commands on the View menu.
•
Rescale axes using the Axis Settings
command on the Plot menu.
Pspug.book Page 107 Wednesday, November 11, 1998 1:14 PM