Response Curve by Frequency Domain Simulation

The response curve generated by the Frequency Domain Simulation plots dBV against frequency. dBV can be converted to an equivalent voltage according to the formula; Voltage Level = 20log(Vo/Vi), where 0dBV = 1V, with that 1V normally an RMS voltage. Question: Is the voltage V corresponding to the dBV of your simulator's response-curve an RMS or Peak or Peak-to-Peak voltage? I ask this because I set your voltage generator model to get input signals for my op-amp circuits at 1V 1kHz sine, and I know that this input voltage is a Peak voltage, which is 1/2 the corresponding Peak-to-Peak voltage, meaning a +-1VAC 1kHz sine. Consequently, I would like to know if your simulator's dBV, where 0dBV = 1V, has that 1V as an RMS a Peak or a Peak-to-Peak voltage,

by Kurtus
October 23, 2025

In short, is the curve from the Frequency Domain Simulation with respect to RMS, Peak, or Peak-to-Peak voltage levels?

by Kurtus
October 23, 2025

Example Circuit

https://www.circuitlab.com/editor/#?id=2qu8m42z52ny

by Kurtus
October 23, 2025

Note: I also posted this question in the CircuitLab Support Forum. If no replies are posted in this thread, I will post their answer here.

by Kurtus
October 23, 2025

I am assuming it is an RMS value, since dBV giving a corresponding voltage level V usually gives V as an RMS value. But I want to be sure this is what the CircuitLab Frequency Domain Simulation's dBV values actually corresponds to. Does anyone out there know the specific answer? I don't want to keep assuming this is so, but would like to know for sure.

by Kurtus
October 24, 2025

I believe I can answer my own question, but would like to follow up with another one. First, I like the online calculator linked here.

https://calculator.academy/db-to-voltage-calculator/

For any dB (volts) I enter, it gives corresponding dBV, dBu, dBuV, V, mV, uV, V Peak (sine), V P-P (sine), V/Vo, and P/Po.

The text at that site, while giving the formulas used by their calculator, specifies that this V is an RMS value.

My question now is:
Can I depend on this calculator to interpret the dBV values on the response curve for my op-amp circuits, as generated by the Frequency Domain Simulation?

by Kurtus
October 26, 2025
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