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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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AC Analysis

 

How do I plot the input or output impedance of my circuit in AC analysis?

 

The input and output impedance of the circuit must be plotted in an indirect way. Go under the Component/Analog Primitives/Waveform Sources section. Select the source called I. This is the SPICE independent current source. Place this source across the nodes where you want to measure the impedance. The Value attribute of the I source should be defined as 'AC 1'. This provides a 1A AC current source for AC analysis. Enter AC analysis. In the AC analysis limits, as the Y-Expression, place the expression:

V(Iname)

where Iname is the Part attribute name of the current source. Since the current is 1A, the voltage across the current source is equivalent to the impedance, so this expression will produce the impedance plot.

 

 

 

 

Categories


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