Capacitor nominal in switched-capacitor filter

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How to define capacitor nominal in switched-capacitor filter?

I have calculated capacitor rations for a some structure of SC filter, where exist 4 capacitors (C0, C1, C2, and C3).
I got, for example, C1=0.1*C0, C2=0.2*C0, and C3=0.3*C0. How to define nominal of base C0 capacitor?
What are the maximum and minimum limits?

Thanks.
 

I think you should define C1 as "nominal" cap value and use multiples of this one for the other ones. The absolute value depends on the used process, a good thumb value is 10 times the gate input cap of your switch transistor(s).
 
Another point of choice could be the kT/C noise if it is of concern...
 

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