How to simulate the frequency response of a SC filter?

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daisyinfall

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I have disigned a switched-capacitor filter,but how can I known the frequency response of the SC filter?
A freind told me that spectreRF(do pss pac simulation) may be useful,and I have tried to do this.but I failed.
Anyone can help me? How to do the pss & pac simulation with spectreRF?

thanks so much !!!
 

hi,
As I know, you can find a old tool, named "switch capacitor".
 

Mentor's eldo supports the frequency response simulation of SC filters.
 

you can use behavior model
 

Thank you all!

But I come across a problem when I try pss & pac simulation,the op-amp's dc gain will decress observably as the clock frequency increase...I do not know how to fix this problem.

What can I do ?
 

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