User Guide

Defining stimuli
77
If you want to specify multiple stimulus types
If you want to run more than one analysis type, including
a transient analysis, then you need to use either of the
following:
• time-based stimulus parts with AC and DC properties
• VSRC or ISRC parts
Using time-based stimulus parts with AC and DC properties
The time-based stimulus parts that you can use to define a
transient, DC, and/or AC input signal are listed below.
In addition to the transient properties, each of these parts
also has a DC and AC property. When you use one of
these parts, you must define all of the transient properties.
However, it is common to leave DC and/or AC undefined
(blank). When you give them a value, the syntax you need
to use is as follows.
Table 14
This property... Has this syntax...
DC
DC_value
[
units
]
AC
magnitude_value
[
units
]
[
phase_value]
VEXP
VPULSE
VPWL
VPWL_F_RE_FOREVER
VPWL_F_N_TIMES
VPWL_RE_FOREVER
VPWL_RE_N_TIMES
VSFFM
VSIN
IEXP
IPULSE
IPWL
IPWL_F_RE_FOREVER
IPWL_F_N_TIMES
IPWL_RE_FOREVER
IPWL_RE_N_TIMES
ISFFM
ISIN
For t
h
e meaning o
f
transient source
properties, refer to the I/V (independent
current and voltage source) device type
syntax in the Analog Devices chapter
in the online OrCAD PSpice A/D
R
eference Manual.
Pspug.book Page 77 Wednesday, November 11, 1998 1:14 PM