Spectrum Software
Industrial Strength Simulation




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.




Easily Overlooked Features - Spring 2006


This section is designed to highlight one or two features per issue that may be overlooked because they are not made visually obvious with a toolbar button.

Reduce Data Points Dialog Box
For some simulations, a very small timestep is used to obtain a high degree of accuracy. However, all of the data points calculated may not be necessary for the visual inspection of the waveform. Having a large amount of data points in the simulation will increase the redraw times of the plot when going between cursor and scope modes, adding text, adding tags, or any other operation that requires a redraw. The Reduce Data Points option provides a method to delete a portion of the calculated data points in order to help speed up the redraw operation. This option is available under the Transient, AC, or DC menus, and the corresponding dialog box appears below.

Reduce Data Points dialog box

This dialog box lets you discard every n'th data point in a save or display operation. Note that if you reduce data points for a save operation, it will also use the display reduce figure when displaying it during a retrieve operation. For example, if both the Save and Display are set to keep every tenth point, performing a save and then retrieving the file without changing either of these will produce an analysis showing every hundredth point. If a DSP operator is used in conjunction with either of these methods, then they are forced to use every data point, and any changes in this dialog box will not have an affect. An FFT window will use the reduced data point set though.

Save every n'th data point: This list box controls the percentage of data points saved in the file when the Run Options is set to Save or a probe analysis is run.

Display every n'th data point: This list box controls the percentage of data points that are plotted when the Run Options is set to Normal or Retrieve. This will be disabled if Now is selected and a DSP waveform is being plotted.

Now: This uses the Display settings to reduce the number of data points in the plot that is presently in memory. The deleted data points cannot be retrieved.

Run Time: This will use the Save and Display settings the next time a simulation is run with the circuit file.

While the Reduce Data Points option is also available in AC and DC analysis, it typically is not required as those simulations are usually not data point intensive.

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