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how do this circuit work?

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samuel

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this circuit is used to reduce switch feedthrouth voltage, but i dont know how it work? anyone can explain this?
 

when the input is high the transconductors output charges the capacitor C2 and this draws current from the clocks path and hence effectively it reduces the feedthrough voltage... when input is low the capacitor C2 gets discharged... this cycle continues....
 

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