FAQ #22: So how does this non-invasive measurement relate to phase margin and gain margin?


The measured Q from the output impedance is 5.77 and we can equate that with 1/(1-T).

We can equate the stability to an equivalent phase margin by assuming the magnitude of the gain vector to be 1 and solving for the Q.

In our simple example below, the measured Q from the output impedance is 5.77 and we can equate that with 1/(1-T).

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