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.




Exporting Data to Excel


Have you ever needed to export a Micro-Cap generated waveform or curve data to Excel? How is it done? Well it's pretty easy, but there are a few steps to making it so. Here are the basic steps:

1) Setup the numeric output options to export the waveform or curve data.
2) Run the analysis.
3) Run Excel and use the Data / Get External Data / Import Text File option.

These are the basic steps, but there are details to be seen to. Here's an test circuit to work with:
Excel test circuit 1

This circuit simply creates a waveform for us to import into Excel. The first step requires that we select transient analysis and then set up the numeric output using the Analysis Limits options:

Analysis limits to produce the wave table.

This will print the V(1) waveform to the numeric output file. To simplify the transfer to Excel a few more steps are helpful.

Press F10 to see the Transient Analysis Properties page and click on the Numeric Output tab. It should look like the next figure.

Properties dialog box

On the left, we have selected 3 Digit Scientific format for both X and Y values because Excel doesn't understand the default engineering notation. On the right, we have disabled all numeric output normally printed and retained only the waveform values. Technically this is not necessary, but it will make it easier to import to Excel if the only thing in the file is the tabular waveform data. Press F2 to run the transient analysis. It should look like this:

Transient analysis plot of the V(1) waveform

Now press F5 to see the numeric output text file. It's name is Export_Data_To_Excel.tno and it looks like this:

Partial numeric output table of V(1)

Here we show only a portion of the 101 waveform values. The first column is time and the second column is the V(1) values for the time. The usual text name headers have been removed by our choice of options.

Now run Excel and select from the Data menu Get External Data / Import Text File. That will bring up the File Open dialog box. Navigate to your data folder and open the file


The screen should look like this:

Excel import wizard page 1 of 3

This page lets you make certain choices about the data in the text file. Our Micro-Cap options have created a delimited set of data so we want to select the Delimited option. Since we have deleted all the other numeric output data we want to start the import at row 1. Click on the Next button and you see page 2 of the Excel Import Wizard. It looks like this:

Excel import wizard page 2 of 3

This screen lets you select the delimiter used to separate the numeric columns. Micro-Cap can use any of several delimiters, including tab, semicolon, comma, space and other. The choice is made on the Micro-Cap Transient Analysis Properties page / Header tab. In our case we've opted to use the Micro-Cap default which is the space character, so we need to select the Space delimiter in the Excel page. Click on the Next button and you see page 3 of the Excel Import Wizard. It looks like this:

Excel import wizard page 3 of 3

This page lets you tell Excel how to translate the data. Since the data is in standard numeric format we need only click the Finish button.

The last page merely wants to confirm where to place the data. It looks like this:

Excel import Finish dialog box

The location is specified in Excel row and column notation and is the first cell to the right of the last cell you clicked on.

Click on the OK button and Excel imports the data. In our case it looks like this next figure.

Imported waveform

This shows what the Excel display should look like along with an Excel plot to show that the plotted waveform matches original the Micro-Cap waveform.

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