help for switched-capacitor circuits

[rainman.cn]

hello,
Fig.1 is the switched capacitor circuit and fig.2 is the clock signal.
the paper say that the error term induced by the finite opamp gain is proportionsl toA(-2), we call this gain-enhanced or gain-squaring,
can anyone tell me how to find the transfer funnction, thanks very much.

regards,
rainman,

 

[rainman.cn]

my msn :
rainman.cn@hotmail.com

 

[rainman.cn]

I donnot know how to get the result Vout/Vin=
(-C1/C2)/(1+(1+C1/C2)/A2), which A2 represent the square of A, anyone can help me ?

 

[maninnet]

could you post that paper?

 

[jerryzhao]

I think it is a filter design. You are writting the prenthesized clock phases trans-function. If don't ignore the gain error, I only get Vout/Vin=
(-C1/C2)/(1+(1+C1/C2)/A). I think you should better post your paper.

 

[rainman.cn]

The paper has been posted,

this circuit is fig. 30 in the paper,

 

[jerryzhao]

"Switched capacitor integrators with low finite gain sensitivity" Electronic Letters, Nov. 1985
The answer maybe in this paper,but I cann't get this paper.

 

[rainman.cn]

I can post the paper here,
The paper only give the result,
I donnot know how to get the right result, can you help me ?
how can gain-squaring happen?

thanks for ur reply. ^_^,

 

[northeast1]

hello,
Fig.1 is the switched capacitor circuit and fig.2 is the clock signal.
the paper say that the error term induced by the finite opamp gain is proportionsl toA(-2), we call this gain-enhanced or gain-squaring,
can anyone tell me how to find the transfer funnction, thanks very much.

regards,
rainman,

you should simplify this circuit to cz-1 ,cz-1/2 types, and calculate the z transfer function.