noise at the output:
Hi dkumar,
For me its a phase starre gating & not sampling, but more interesting is, that whats your noise source?
I think that your circuit has practical realisations problems, as failed bypassing of supplys, not shielded circuit parts and (input)lines, especially sampling C & switch!
Their are "high impedance" parts with higher bandwidth in your circuit, also good receivers for all disturbend signals as (ambient) noises too...
Is your scope probe, for example, installed (for these photo/tests) with only 1-2 cm long GND -loop!?
But why is it not possible for you to test your signal chain (for noise only)from stage to stage pls?
K.