--- In LTspice@..., <sawreyrw@...> wrote:
Maarten,
You set up the circuit correctly, but did you determine the phase margin by plotting V(fb)/V(inm)? Doing this I see a phase margin of 72.8 degrees at 9.16 MHz. In think the circuit is ok, but you should be aware that the output impedance of U2 has a significant effect. You can see that V(ref) increases significantly as the frequency goes up.
Rick
Rick, How did you manage to get three digits of resolution? I tried using the cursor but could not locate 0dB or measure the phase angle that accurately. I assume you used the .measure command - could you post it for those of us who are interested?
Thanks,
Mike
