How to increase BW in folded cascode amplifier?

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kundahari

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Hi friends,

I designed folded cascode opamp..I would like to get BW around 200M,
but i got around 100 M, can anyone plz tell me what can i do for increasing BW

Thnakx
 

Folded cascode amp

Increase the gm of the input device...
 

Folded cascode amp

Or reduce your output cap.

If your paracitic capacitors are already to big. Maybe you can reduce the sizes of your output devices.
 

Folded cascode amp

Be careful though, because the first non-dominant pole will hardly move, so your phase margin decreases...
 

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