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UGB Gain & Phase Margin

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Nikhil Motiani

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Does anyone have any idea how to tradeoff between UGB Phasemargin & DC Gain for a single ended folded cascode differential + Common gate stage?????????
 

Hi Nikhil,
Considering that you have only two poles inside UGB.
UGB can be decided by gain & first dominant pole location. Ex: For high BW (600MHZ, your other post) your pole should be far from origin.
Now for Phase Margin >30deg <45deg your 2nd pole location should be close to your UGB.
 

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