vivkr
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Hi,
The simulation can be done the same way as for any other opamp. The simplest scheme however is to leave the gain boost amps the way they are, and measure its AC performance in closed-loop.
Remember that the gain and phase of the amplifier (for the same load) remain the same whether it is tested in closed loop or open loop. So, you can define gain as
VAC("out")/(VAC("inp")-VAC("/inm"))
The gain and phase of this quantity give you all the information you need.
As to the realization of the boost amp, it can be made using any conventional topology (common-source, differential pair, folded-cascode etc.) depending on what kind of gain you want and other constraints.
Hope this helps.
Regards Vivek
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