User Guide

The Stimulus Editor utility
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To use any of these source types, you must place the
symbol in your schematic and then define its transient
behavior.
Each property-characterized stimulus has a distinct set of
attributes depending upon the kind of transient behavior
it represents. For VPWL_F_xxx, IPWL_F_xxx, and FSTIM,
a separate file contains the stimulus specification.
As an alternative, the Stimulus Editor utility automates
the process of defining the transient behavior of stimulus
devices. The Stimulus Editor allows you to create analog
stimuli which generate sine wave, repeating pulse,
exponential pulse, single-frequency FM, and piecewise
linear waveforms.
The stimulus specification created using the Stimulus
Editor is saved to a file, automatically configured into the
schematic, and associated with the corresponding VSTIM
or ISTIM part instance or symbol definition.
The Stimulus Editor utility
The Stimulus Editor is a utility that allows you to quickly
set up and verify the input waveforms for a transient
analysis. You can create and edit voltage sources, and
current sources for your circuit. Menu prompts guide you
to provide the necessary parameters, such as the rise time,
fall time, and period of an analog repeating pulse.
Graphical feedback allows you quickly verify the
waveform.
Stimulus files
The Stimulus Editor produces a file containing the stimuli
with their transient specification. These stimuli are
defined as simulator device declarations using the V
(voltage source) and I (current source) forms. Since the
OrCAD program versions without the
Stimulus Editor must use the
characterized-by-property sources listed in
Table 10 on page 10-252
.
Pspug.book Page 253 Wednesday, November 11, 1998 1:14 PM