Question: how is ugbw written as gm 2 / Cc why shouldnt it be gm 1 / Cc as we multiply dc gain with the first

how is ugbw written as gm2/Cc why shouldnt it be gm1/Cc as we multiply dc gain with the first dominant pole. also what is the relation between phase margin and ugbw? how did you get that for 60 degree non dominant pole must be twice of ugbw

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