This is great, but there is a SPICE booby trap waiting for the unwary user of the Bode plotter. ![]() In both cases above, the analysis frequency range is 0.001 Hz to 1 GHz. The Bode plotter will simply examine the circuit itself and come up with its Bode plot results with no regard to the chosen excitation frequency. ![]() Note that it does not matter what excitation frequency you choose for that source. To make the Bode plotter work, you need to provide some source of excitation, such as the V1 source shown here. ![]() When we look at two examples of the plotter examining identical circuits, their Bode plots are exactly alike, independently of the different frequencies of V1, which is 1 kHz, on the left and 100 kHz on the right. ![]() Please note that the analysis result does not depend on the drive frequency of V1.įigure 1 Bode plotter at work (two examples) MultiSim SPICE has a variety of measurement instrument simulations, one of which is the Bode Plotter, which will yield Bode plots of whatever circuit you assign it to such as the following.
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