Joint Blind Calibration for Mixed Mismatches in Two-Channel Time-Interleaved ADCs

To further enhance the dynamic performance of time-interleaved analog-to-digital converters (TI-ADCs), both linear and nonlinear mismatches should be estimated and compensated for. This paper introduces a method for joint calibration of several types of linear and nonlinear mismatch errors in two-ch...

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Published in:IEEE transactions on circuits and systems. I, Regular papers Regular papers, 2015-06, Vol.62 (6), p.1508-1517
Main Authors: Yinan Wang, Johansson, Hakan, Hui Xu, Zhaolin Sun
Format: Article
Language:English
Subjects:
Adaptive calibration
analog-to-digital converter
Approximation methods
Calibration
cascaded structure
Convergence
Estimation
Gain
joint calibration
Joints
linear mismatches
mixed mismatches
Nonlinear distortion
nonlinear mismatches
time interleaving
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container_title IEEE transactions on circuits and systems. I, Regular papers
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Johansson, Hakan
Hui Xu
Zhaolin Sun
description To further enhance the dynamic performance of time-interleaved analog-to-digital converters (TI-ADCs), both linear and nonlinear mismatches should be estimated and compensated for. This paper introduces a method for joint calibration of several types of linear and nonlinear mismatch errors in two-channel TI-ADCs. To demonstrate the generality of this method, we take different scenarios into account, including static and dynamic mixed mismatch models. The proposed method utilizes a normalized least-mean square (N-LMS) algorithm as well as a certain low degree of oversampling for the overall converter to estimate and compensate for the mixed mismatch errors. The calibration performance and computational complexity are investigated and evaluated through simulations.
doi_str_mv 10.1109/TCSI.2015.2418835
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1558-0806
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source IEEE Electronic Library (IEL) Journals
subjects Adaptive calibration
analog-to-digital converter
Approximation methods
Calibration
cascaded structure
Convergence
Estimation
Gain
joint calibration
Joints
linear mismatches
mixed mismatches
Nonlinear distortion
nonlinear mismatches
time interleaving
title Joint Blind Calibration for Mixed Mismatches in Two-Channel Time-Interleaved ADCs
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