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Capacitor mismatch in sampler/DAC (Read 1502 times)
DesertFox
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Capacitor mismatch in sampler/DAC
Sep 25th, 2015, 12:14pm
 
How does capacitor mismatch depend on the value of the capacitor? Is it the same as mosfets i.e. with increase of area the mismatch reduces? If I am not limited by kT/C noise in sampler (my design has multiple samplers), can I go arbitrarily low with the value of the capacitor or is it limited after a certain resolution?
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loose-electron
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Re: Capacitor mismatch in sampler/DAC
Reply #1 - Sep 29th, 2015, 9:52pm
 
matching improves with size - unique to foundry data should be sought out.

as for smaller capacitors? Eventually KT/C noise gets you, or the charge injection of the switches starts to become a significant part of the error, or leakage into a gate starts to become an error source.
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