Correlation-based reconfigurable blind calibration for timing mismatches in TI-ADCs

Mismatches between sub-channels limit the dynamic performance of time-interleaved analog-to-digital converters (TI-ADCs). This paper proposes a correlation-based method of calibration for timing mismatches in M-channel TI-ADCs by using the cross-correlation between sub-channels of the output signals...

Full description

Saved in:
Bibliographic Details
Published in:Analog integrated circuits and signal processing 2021-04, Vol.107 (1), p.29-38
Main Authors: Zhao, Chengxuan, Diao, Jietao, Xu, Hui, Wang, Yinan
Format: Article
Language:English
Subjects:
Analog to digital conversion
Analog to digital converters
Calibration
Channels
Circuits and Systems
Correlation
Cross correlation
Electrical Engineering
Engineering
Reconfiguration
Signal,Image and Speech Processing
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Mismatches between sub-channels limit the dynamic performance of time-interleaved analog-to-digital converters (TI-ADCs). This paper proposes a correlation-based method of calibration for timing mismatches in M-channel TI-ADCs by using the cross-correlation between sub-channels of the output signals to estimate the temporal deviations. The output signal is calibrated by reducing the arbitrary order distortion, which is approximated by multiplying the distortions with the estimated coefficients of mismatch. Furthermore, a reconfigurable strategy composed of stages of arbitrary calibration is proposed to achieve suitable stages with the requisite dynamic performance. Finally, the calibration performance of the proposed method is verified through simulations that use different input signals and strengths of mismatch.
ISSN:0925-1030
1573-1979
DOI:10.1007/s10470-020-01788-6