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Lowpass filter with wsitched capacitor resistor simulation.

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oktan

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resistor simulation

Hi,
I have a problem with simulation of the low pass filter with switched capacitor resistor!
i attached the schematic picture also.. so as u see this circuit is using 2 none overlapping pulse generator!so when i do the transient simulation my pulse gens are working fine but when i do the AC simulation my out put also should change because by changing the pulse gen's period or pulse width i can increase or reduce the resistance.. so problem i think is that in ac simulation the pulse gens are not taking to account!! how can i make the simulator to do that ?? and also is there any other way to get the ac simulations out put?? so im looking forward to your comments!
i use cadence IC design kit with mentor's eldo simulation!
already thank you!!

cheers:)
 

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