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How to measure linearity of an input buffer in Cadence

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Dear all,

I am now designing an input buffer in the track and hold (using switched emitter topology). I was wondering how should I test the input buffer that I have designed in Cadence? What kind of measurement should I be taking? P1dB? IIP3? Can anyone please provide me guildance on how to carry out those measurement in Cadence. Thank you very much for your time! :D[/b]
 

you can do the IIP3 analysis and then convert the input power to voltage
 

Could you please provide me detail on how to do IIP3 analysis in Cadence please? thank you very much!
 

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