analogman
Junior Member level 1
Now I study noise analysis of SC circuit , especially refering to Pipeline ADC papers(called MDAC).
And there is a question I can't find out.
In sampling phase, why shouldn't we need to think of thermal noise
contribution of opamp?
Most of the papers say thermal noise contribution in sample phase
is caused by kT/C noise(ON resistance).
But it in hold phase is caused by both kT/C and Opamp.
In sampling phase, opamp input is virtual ground, so don't we need to think about that ?
If any books say the reason, tell me please.
Sorry for my poor English.
Thanks.
And there is a question I can't find out.
In sampling phase, why shouldn't we need to think of thermal noise
contribution of opamp?
Most of the papers say thermal noise contribution in sample phase
is caused by kT/C noise(ON resistance).
But it in hold phase is caused by both kT/C and Opamp.
In sampling phase, opamp input is virtual ground, so don't we need to think about that ?
If any books say the reason, tell me please.
Sorry for my poor English.
Thanks.