sth about high order switched-capacitance filter design

[sxb416]

Hello!
I have been designing the high order sc filter for almost one month.
I can't get the prospective signal.I don't know why.
The following is my design flow.
1.I get the H(s) and H(z) transfer function using the matlab program
2.find the pole and zero to get the Q and the 2 order cascade form.
3. from the cascade expresion get the cap value
4.from the project object we get the SR,dc gain and UGB to design the amp
5.use the ideal amp the simulation the systerm ,it is ok.
6.but use the real amp, the signal is wrong.
why it is?
is anybody help me ?
I have used the Filter Solution software the get the cap value,does the software get the value after the scaling or not ?
where have i make the mistake?

 

[LvW]

It's not easy to answer your question based on the given information.
However, one question:
In the last sentence you mention the filter solution software ("to get the cap value");
did you use the software only for this puppose or to find the complete SC topology?

 

[sxb416]

thanks for your help!