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News:

Spectrum Software has released Micro-Cap 11, the eleventh generation of our SPICE circuit simulator.

For users of previous Micro-Cap versions, check out the new features available in the latest version. For those of you who are new to Micro-Cap, take our features tour to see what Micro-Cap has to offer.

 

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Initial Conditions

 

I have used a .IC statement to set a voltage across an inductor, but when I run transient analysis, the results are different than what I set.

 

In the Transient Analysis Limits, the Operating Point must be disabled. A .IC statement will usually keep the voltage fixed through an operating point calculation. However, when it computes an operating point, it short circuits all inductors. Thus an initial condition across an inductor is a mathematical impossibility and may end up producing extremely large currents within the circuit as the voltage iterates to 0. Disabling the operating point will fix this. Similarly, a voltage source also can not have a .IC statement across it.

 

 

 

 

Categories


AC Analysis
Analysis - General
DC Analysis
Dynamic DC
Incompatibilities
Initial Conditions
Miscellaneous
Models
Monte Carlo
Output
Probe
Schematic Editor
Stepping
Transient Analysis