User Guide

Chapter 10 Transient analysis
252
Defining a time-based stimulus
Overview of stimulus generation
Symbols that generate input signals for your circuit can be
divided into two categories:
• those whose transient behavior is characterized
graphically using the Stimulus Editor
• those whose transient behavior is characterized by
manually defining their properties within Capture
Their symbols are summarized in Table 10
.
Table 10 Stimulus symbols for time-based input signals
Specified by... Symbol name Description
Using the
Stimulus Editor
VSTIM voltage source
ISTIM current source
Defining symbol
attribute
VSRC
VEXP
VPULSE
VPWL
VPWL_RE_FOREVER
VPWL_F_RE_FOREVER
VPWL_N_TIMES
VPWL_F_N_TIMES
VSFFM
VSIN
voltage sources
ISRC
IEXP
IPULSE
IPWL
IPWL_RE_FOREVER
IPWL_F_RE_FOREVER
IPWL_N_TIMES
IPWL_F_N_TIMES
ISFFM
ISIN
current sources
Pspug.book Page 252 Wednesday, November 11, 1998 1:14 PM