analog delta sigma modulator integrator gain determination

[liusupeng]

There is an integrator inside the analog delta sigma modulator. How to decide the gain of this integrator?
suppose the integrator is represented by a/S. how to decide the coefficient of a? Does the selection of a affect bandwidth or something else?
Looking forward to your reply!

 

[yangyang10182]

Is your modulator a switch capacitor modulator? If it is, the gain of the integrator may be Cs/Ci. Cs, the sampling capacitor, Ci, the integrating capacitor.

 

[liusupeng]

Is your modulator a switch capacitor modulator? If it is, the gain of the integrator may be Cs/Ci. Cs, the sampling capacitor, Ci, the integrating capacitor.

Hi Yangyang,
Thanks a lot for your reply. Actually i want to know what are the considerations when choose the value of Cs/Ci. what parameters will it affect when choose different Cs/Ci value.