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Gain of two stage OTA

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ncj

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I am a beginner in Cadence,I am designing a two stage OTA. My design has folded cascoded configuration in the first stage with class AB along with current mirrors in the 2nd stage.I have attained saturation for all transistors except for one,which is now operating in linear region. My output shows amplification,but i get a triangle wave with ac gain too low..i.e.17 dB(expected dB is 80dB).Plz help with solutons..
 

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