Interchannel Mismatch Calibration Techniques for Time-Interleaved SAR ADCs
Interleaving is a powerful technique that boosts the speed of an ADC. The power efficiency of such a technique is mainly affected by the overhead of the circuitry used to mitigate the impact of inter-channel mismatches on the ADC’s performance. This paper reviews some of the most importan...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IEEE
2021-01-01
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| Series: | IEEE Open Journal of Circuits and Systems |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/9440661/ |
| _version_ | 1818662715991785472 |
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| author | Mojtaba Bagheri Filippo Schembari Hashem Zare-Hoseini Robert Bogdan Staszewski Arokia Nathan |
| author_facet | Mojtaba Bagheri Filippo Schembari Hashem Zare-Hoseini Robert Bogdan Staszewski Arokia Nathan |
| author_sort | Mojtaba Bagheri |
| collection | DOAJ |
| description | Interleaving is a powerful technique that boosts the speed of an ADC. The power efficiency of such a technique is mainly affected by the overhead of the circuitry used to mitigate the impact of inter-channel mismatches on the ADC’s performance. This paper reviews some of the most important methods of calibrating such mismatches and presents a frequency-domain analysis of timing skew in a time-interleaved (TI) ADC. A new calibration approach is also proposed that calibrates the timing and offset mismatches between the channels simultaneously. Behavioral modeling simulations of a 15-channel 10-b 2GS/s TI SAR ADC show an improvement of 35 dB in the SFDR after calibration. The impact of circuit nonidealities and noise is also assessed, and mitigation techniques are proposed. |
| first_indexed | 2024-12-17T05:05:22Z |
| format | Article |
| id | doaj.art-cf543903dade44f2bfbabc333aae9700 |
| institution | Directory Open Access Journal |
| issn | 2644-1225 |
| language | English |
| last_indexed | 2024-12-17T05:05:22Z |
| publishDate | 2021-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Open Journal of Circuits and Systems |
| spelling | doaj.art-cf543903dade44f2bfbabc333aae97002022-12-21T22:02:26ZengIEEEIEEE Open Journal of Circuits and Systems2644-12252021-01-01242043310.1109/OJCAS.2021.30836809440661Interchannel Mismatch Calibration Techniques for Time-Interleaved SAR ADCsMojtaba Bagheri0https://orcid.org/0000-0003-4776-2777Filippo Schembari1https://orcid.org/0000-0001-6093-8269Hashem Zare-Hoseini2https://orcid.org/0000-0002-9599-4890Robert Bogdan Staszewski3https://orcid.org/0000-0001-9848-1129Arokia Nathan4https://orcid.org/0000-0002-2070-8853Agile Analog Ltd., Cambridge, U.K.Huawei Technologies, Segrate, ItalyHanwha Phasor Ltd., London, U.K.School of Electrical and Electronic Engineering, University College Dublin, Dublin 4, IrelandDarwin College, Cambridge University, Cambridge, U.K.Interleaving is a powerful technique that boosts the speed of an ADC. The power efficiency of such a technique is mainly affected by the overhead of the circuitry used to mitigate the impact of inter-channel mismatches on the ADC’s performance. This paper reviews some of the most important methods of calibrating such mismatches and presents a frequency-domain analysis of timing skew in a time-interleaved (TI) ADC. A new calibration approach is also proposed that calibrates the timing and offset mismatches between the channels simultaneously. Behavioral modeling simulations of a 15-channel 10-b 2GS/s TI SAR ADC show an improvement of 35 dB in the SFDR after calibration. The impact of circuit nonidealities and noise is also assessed, and mitigation techniques are proposed.https://ieeexplore.ieee.org/document/9440661/SAR analog-to-digital converter (ADC)time-interleaved ADCtiming-skew calibration |
| spellingShingle | Mojtaba Bagheri Filippo Schembari Hashem Zare-Hoseini Robert Bogdan Staszewski Arokia Nathan Interchannel Mismatch Calibration Techniques for Time-Interleaved SAR ADCs IEEE Open Journal of Circuits and Systems SAR analog-to-digital converter (ADC) time-interleaved ADC timing-skew calibration |
| title | Interchannel Mismatch Calibration Techniques for Time-Interleaved SAR ADCs |
| title_full | Interchannel Mismatch Calibration Techniques for Time-Interleaved SAR ADCs |
| title_fullStr | Interchannel Mismatch Calibration Techniques for Time-Interleaved SAR ADCs |
| title_full_unstemmed | Interchannel Mismatch Calibration Techniques for Time-Interleaved SAR ADCs |
| title_short | Interchannel Mismatch Calibration Techniques for Time-Interleaved SAR ADCs |
| title_sort | interchannel mismatch calibration techniques for time interleaved sar adcs |
| topic | SAR analog-to-digital converter (ADC) time-interleaved ADC timing-skew calibration |
| url | https://ieeexplore.ieee.org/document/9440661/ |
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