Some questions about an OTA design.

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leonken

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1. The input diff. pair Q1 and Q2 must operate in saturate region?
If the Q1 and Q2 operate in subthreshold region, the Dc gain of the diff. pair stage will be reduced?
2. the Q5 and Q7 must operate in saturate region?
3. the Q3 and Q4 must must operate in saturate region?
4. How to bias the Q6? the Q6 operates in saturate region too?
 

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