User Guide

Chapter 8 DC analyses
218
Setting up a DC stimulus
To run a DC sweep or small-signal DC transfer analysis,
you need to place and connect one or more independent
sources and then set the DC voltage or current level for
each source.
To set up a DC stimulus
1 Place and connect one of these symbols in your
schematic:
2 Double-click the symbol instance to display the Parts
spreadsheet appears.
3 Click in the cell under the DC column to edit its value.
4 Define the DC specification as follows:
Table 10
For voltage input
Use this... When you are running...
VDC A DC Sweep and/or Bias Point (transfer
function) analysis only.
VSRC Multiple analysis types including DC
Sweep and/or Bias Point (transfer
function).
Table 11
For current input
Use this... When you are running...
IDC A DC Sweep and/or Bias Point (transfer
function) analysis only.
ISRC Multiple analysis types including DC
Sweep and/or Bias Point (transfer
function).
I
f
you are p
l
anning to run an AC or
transient analysis in addition to a DC
analysis, see the following:
• Using time-based stimulus
parts with AC and DC
properties on page 3-77
for
other source symbols that you can use.
• Using VSRC or ISRC parts
on page 3-78
to find out how to
specify the TRAN attribute for a
time-based input signal when using
VSRC or ISRC symbols.
Pspug.book Page 218 Wednesday, November 11, 1998 1:14 PM