I want to compare the calculated bode plot of an inverting op-amp with the simulated one, on the 1 mHz-200 kHz spectrum.
As expected, theoretically there is no stray capacitance on the circuit above, so the calculated transfer function is -1, unity gain with phase inversion, no matter the frequency, whereas in the simulation, a more acurated aproach to reality (TL072 for example), it's showing a low pass, -0.028 dB @ 200 kHz.
In order to take the calculated plot as a reference, I can't write in my paper that a great deal of similarity between the two plots was observed, because "a great deal" is a personal judgment, what I consider to be very simular may not be similar enough for the so-called doctors of engineering.
I must stablish a standard of what is too much and what is not, or calculate the percentage discrepancy. As I want to take the calculated plot as the reference, what's the percentage difference between 0 dB and any other gain, -0.028 dB in my case?
Please do not tell me to take the simulated plot as the reference, I wanna know how to take 0 dB as a reference in a percentual comparison.