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i want to design full op amp with gain booster,but i don't know the reason that the additional stage is slower than main stage. somebody can explain that.
Re: the additional stage slower than main stage with gain b
The UGB of the auxiliary amp can be anywhere between the dominant and the second pole of the original stage to ensure the stability of the loop formed since the second pole of the main stage also comes in the gain-boosting loop. Additional stage can be faster than the original one but at the cost of phase margin and power.
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