Hi,

if you want to simulate the overall transfer function of the switched-capacitor block, you cannot obtain it from AC simulation in Hspice, only through PAC simulation in Spectre. If you want to run noise simulations, you can simulate separately the noise in the different switching phases and calculate the overall noise performance mathematically. If you want to simulate the amplifier behavior, you must replace parts of your switched capacitors by equivalent resistors to run Hspice AC simulation.

Hope this helps

Paul

Yes, Spectre will accept HSpice model files.