I am in the myst of prove how a folded cascode configuration can help to improve the cut off frequency of a CMOS transistor. I need formula to proof how this is happened?
Anyhow, formula or intuition explanation or any other positive explanation are appreaciated.
adding a cascode isolates the output node from the input node and thereby removing the miller cap from being seen at the output node, hence the improved freq performance. Cascode also provides more gain by increasing effective output impedance. Hope this helps.