An RC network using the oscilloscope and Bode plotter In this example we use the oscilloscope and the Bode plotter in an RC circuit that has an AC source. Tracciamento dei diagrammi di Bode con il BodePlotter, partendo dal circuito.
I used one microvolt peak for V2 and fed that to the top of R3 via one teraohm. The circuit which we will construct is shown in Figure E2-1.
Figure E2-1 The complete circuit showing the oscilloscope and Bode plotter. Fig 1 Le alternative offerte da Multisim per questo tipo di simulazione sono diverse iniziamo considerando, tra gli strumenti di Multisim, l’uso del Bode Plotter per valutare un semplice circuito RC passa-basso, come indicato nella Fig. To be sure, the circuit disruptive effect of V2 and R4 on the oscillator was negligible, but by including those two parts in the simulation, the Bode Plotter came to life and gave me a usable result. Maybe I could have put my one microvolt signal in series with R3 or something like that but I had what I needed so I didn’t look any further into it. To be sure, the Bode plot of the passive components alone and the Bode plot of those components in the oscillator differ slightly, but I chose to ascribe that difference to a slight loading effect, perhaps by the 2N4392 gate. This article was originally published on EDN. John Dunn is an electronics consultant, and a graduate of The Polytechnic Institute of Brooklyn (BSEE) and of New York University (MSEE).
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