Tlaloc
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Posts: 81
Dallas, TX
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These are identical structures, just with different flavors of inputs. Either one could be made to meet the specs that you've given, but there are so many trade-offs implied in your question. To answer the question as you stated it, but with a large amount of ambiguity, both have merit and both could be better at different times depending on the circumstance.
It really seems like you need to consult a text book first, and one popular one is "Analysis and Design of Analog Integrated Circuits" by Grey, Hurst, Lewis, and Meyer.
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