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How to get voltage or current vs. frequency plot in Fast Fourier Transform (FFT) for a transient analysis in PSpice?

AyushD

Fourier analysis calculates DC and Fourier components of the result of a transient analysis.


Using the probe window in PSpice, a Fast Fourier Transform (FFT) of the complete waveform can be calculated and its spectrum is displayed.


To get the voltage or current vs. frequency plot, after running transient analysis in PSpice, select the FFT option in the probe window by going to Trace > Fourier.

Note: X-Axis of the graph changes from Time to Frequency. Now, select Trace > Add Trace. This opens the Add Traces window. Select the DB () function under Analog Operators and Functions and on the left side, select the trace, for example, V(OUT1).

The resultant vdb(out1) will display the voltage vs. frequency plot.

Let us know if you find it useful and want to see more posts like this.

Team DesignTech
Cadence Design Systems

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