package analyses "Types of analyses supported by SPICELib"
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Performing Circuit Analyses
Analysis types supported by SPICELib are shown in Table 1.
Each analysis type is described in the corresponding class documentation.
Table 1. SPICELib analyses summary.
| Package |
Model |
Analysis type |
|---|
| analyses |
OP |
Bias point calculation. |
| analyses |
AC |
AC sweep. |
| analyses |
TRAN |
Transient (time) analysis. |
Global parameters
The value of two global parameters has to be defined (see Table 2).
Table 2. Global parameters.
| TimeScale |
It is intended for providing an (rough) approximate
value of the circuit time-constant. |
| LogResults |
It determines the amount of information to be logged during the
bias point calculation and the AC small-signal analysis. |
Log of analysis results
SPICELib logs the analysis results to the dslog.txt file (using Dymola's
LogVariable function). Two parameters control this information log
(see Table 3 and 4).
Table 3. Parameters controlling the results log.
| LogResults |
Global parameter. |
| HIDDEN_COMPONENT |
Device-dependent parameter |
Table 4. LogResults values producing the variable
log as a function of HIDDEN_COMPONENT value.
| |
HIDDEN_COMPONENT = false |
HIDDEN_COMPONENT = true |
| Voltage at resistor pines |
0, 1, 2 |
2 |
| Current through independent voltage sources |
0, 1, 2 |
2 |
| Total power dissipation |
0, 1, 2 |
2 |
| Voltage drop at resistors |
1, 2 |
2 |
| Current through resistors |
1, 2 |
2 |
| Power dissipation at each independent voltage source |
1, 2 |
2 |
The complex AC small-signal voltages and currents are logged in Cartesian
and polar coordinates. In addition, the polar magnitude is also expressed
in decibels (defined as 20*log10( )).
Setting the Stop Time
SPICELib analysis models force the simulation end when they have completed their
operations. Large simulation times should be selected in the modeling environment
experiment definition (for example, \"Simulation/Setup/Stop time\" in Dymola)
to avoid interfering with analysis execution.
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end analyses;