Timing Mismatch Calibration for Multiple-Channel TI-ADC 


Vol. 47,  No. 5, pp. 701-709, May  2022
10.7840/kics.2022.47.5.701


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  Abstract

Sample timing mismatch between analog-to-digital converters (ADC) channels is a major factor in degrading the spurious free dynamic range (SFDR) performance of Time-interleaved ADCs (TI-ADCs). In the conventional sample timing mismatch calibration scheme for multi-channel TI-ADC, an approximated frequency response was applied to the calibration filters, because the frequency response is induced in a complicated closed-form expressions. Thus, SFDR performance improvements are reduced by approximation in environments with large sample timing mismatch. In this paper, we propose a sample timing mismatch calibration scheme robust to sample timing mismatch for multi-channel TI-ADC. In order to calibrate the sample timing mismatches between multiple channels, all channels are paired into groups, and the mismatch is calibrated for each group. Then, grouping and calibration are sequentially performed on the results of the previous calibration to calibrate the sample timing mismatch of all channels. The performance simulations show that the proposed scheme maintains the calibration performance even in an environment in which the sample timing mismatch range is large, whereas the conventional scheme degrades the calibration performance as the sample timing mismatch range increases.

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  Cite this article

[IEEE Style]

D. Na, W. Seo, H. Shim, K. Choi, "Timing Mismatch Calibration for Multiple-Channel TI-ADC," The Journal of Korean Institute of Communications and Information Sciences, vol. 47, no. 5, pp. 701-709, 2022. DOI: 10.7840/kics.2022.47.5.701.

[ACM Style]

Dongjun Na, Won-Gi Seo, Hongsuk Shim, and Kwonhue Choi. 2022. Timing Mismatch Calibration for Multiple-Channel TI-ADC. The Journal of Korean Institute of Communications and Information Sciences, 47, 5, (2022), 701-709. DOI: 10.7840/kics.2022.47.5.701.

[KICS Style]

Dongjun Na, Won-Gi Seo, Hongsuk Shim, Kwonhue Choi, "Timing Mismatch Calibration for Multiple-Channel TI-ADC," The Journal of Korean Institute of Communications and Information Sciences, vol. 47, no. 5, pp. 701-709, 5. 2022. (https://doi.org/10.7840/kics.2022.47.5.701)

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pISSN : 1226 - 4717
eISSN : 2287 - 3880