Blind SAR ADC Capacitor Mismatch Calibration

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Title: Blind SAR ADC Capacitor Mismatch Calibration
Authors: Salib, ArmiaFlanagan, Mark F.Cardiff, Barry
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Date: 9-Aug-2017
Online since: 2019-10-08T15:17:25Z
Abstract: This paper presents an all-digital background blind calibration technique for the capacitor mismatch problem in SAR ADCs. It utilizes the redundancy offered using a sub-radix-2 DAC architecture to blindly estimate the mismatch and the assigned weight for each comparator decision. The weights are estimated by building partial histogram windows for the comparator decision vectors. To remove the dependency on the input signal's probability density function, the histogram windows are normalized with respect to their peaks. Matlab simulation results show that an ENOB within 0.12bit of the optimal is attained using the proposed algorithm.
Funding Details: European Commission - European Regional Development Fund
Science Foundation Ireland
Type of material: Conference Publication
Publisher: IEEE
Copyright (published version): 2017 IEEE
Keywords: SAR ADCCapacitor mismatchCalibration
DOI: 10.1109/MWSCAS.2017.8052991
Language: en
Status of Item: Peer reviewed
Is part of: 2017 IEEE 60th International Midwest Symposium on Circuits and Systems (MWSCAS)
Conference Details: The 2017 IEEE 60th International Midwest Symposium on Circuits and Systems (MWSCAS)
ISBN: 9781509063895
Appears in Collections:Electrical and Electronic Engineering Research Collection

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