Do you use the Return ratio or Bode's for loop gain design?

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Markie

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bodes return ratio

In simulation, DB(Vout/Vin) is enough?

The designers who I knows all just use traditional methods to simulate the loop gain. I just wondered.

Can any body tell me the return ratio useful to my analog work?
 

loop gain return ratio

You should simulation the loopgain PM and GM
Of cause. The return ratio f is be noticed.
 

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