which picture?I break the feedback for open-loop ac simulation , I put an inductor and a capacitor series with ac-source as shown in picture
Yes.Is it true for achieve frequency response?
Big values, like e.g. 1H & 1F.what value is suitable for inductor and capacitor?
with this procedure DC-gain is equal to 0dB , because inductor is short circuit and then Vo is equal to Vi, but frequency response of LDO in papers is different, how I can solve this problem in y simulation?
Actually both methods can work. I'd personally prefer perado's method as the crossover frequency can easily be identified at 0 degrees.The Cap should be connected to an AC gnd, like GND. The AC stimulus should be applied at vref.
... then DC gain(Vo/Vi) will be 1 (0dB) , but itsnt in agree with open-loop simulation result in journal papers , then what I do?
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