Switched capacitor circuit - effect of input capacitance

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Dear All,

May I know the effect of input capacitance on the accuracy of a switched capacitor circuit in general (differential multiply by 2 circuit in specific).

Thanks a lot in advance!!

Best Regards,
M.
 

Clarify your Q more.
 

Does the amplifiers input capacitance have any effect on the multiply by 2 operation, will it introduce any amount of error?

Thank you,
M.
 

It might influence. Input capacitance of amplifier might have charge sharing with switched capacitors.
 
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    FvM

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Yes, input capacitance in combination with finite amplifier gain causes a gain error. You'll find the basic equations in text books, e.g. Razavi.
 
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