I am using Falstad's circuit simulator to test a design of an Op-Amp based microphone-speaker system…kind of like a megaphone, but the speaker is going to be a piezo plate. Falstad does not have a speaker or piezo speaker component I can add. What resistor/capacitor/diode/inductor/etc. would properly simulate a piezo in the circuit?
Current circuit diagram for reference. The top right box is bandpass filter.
Best Answer
Sure you just have to know the RLC values and add a current limit to the OpAmp with a series Rout, inside the feedback loop for Isc = V+,-/Rout
If you choose to measure these values, sweep the piezo with a series R that attenuates roughly in half, then use a cap that does the same then plug these values and big values for L (mH) and match the Bode plot using Falstad http://www.falstad.com/circuit/e-filt-hipass-af.html