User`s guide

Definin
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Stimuli 3
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Definin
g
Stimuli
To simulate your circuit, you need to connect one or more
source symbols that describe the input signal that the circuit
must respond to.
The MicroSim libraries supply several source symbols that are
described in the tables that follow. These symbols depend on:
• the kind of analysis you are running,
• whether you are connecting to the analog or digital portion
of your circuit, and
• how you want to define the stimulus: using the Stimulus
Editor, using a file specification, or by defining symbol
attribute values.
Analo
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Stimuli
Analog stimuli include both voltage and current sources. The
following table shows the symbol names for voltage sources.
If you want this kind of
input...
Use this symbol for
volta
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e...
For DC analyses
DC bias VDC or VSRC
For AC analyses
AC magnitude and phase VAC or VSRC
For transient analyses
exponential VEXP or VSTIM
*
periodic pulse VPULSE or VSTIM*
piecewise-linear VPWL or VSTIM*
piecewise-linear that repeats forever VPWL_RE_FOREVER or
VPWL_F_RE_FOREVER
**
See Setting Up a DC Stimulus
on page 9-5 for more details.
See Setting Up an AC Stimulus
on page 10-3 for more details.
See Defining a Time-Based
Stimulus on page 11-3 for more
details.