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Dynamic Calibration of Undersampled Pipelined ADCs by Frequency Domain Filtering
Royal Institute of Technology (KTH), Stockholm, Sweden.
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Electronics, Mathematics and Natural Sciences. Royal Institute of Technology (KTH), Stockholm, Sweden.
Stanford University.
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Electronics, Mathematics and Natural Sciences. (Elektronik)ORCID iD: 0000-0001-5429-7223
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2013 (English)In: IEEE Transactions on Instrumentation and Measurement, ISSN 0018-9456, E-ISSN 1557-9662, Vol. 62, no 7, 1882-1891 p.Article in journal (Refereed) Published
Abstract [en]

Integral nonlinearity (INL) is used for the postcorrection of pipeline analog-digital converters (ADCs). An input-frequency-dependent INL model is developed for the compensation. The model consists of a static term that is dependent on the ADC output code, and a dynamic term that has an additional dependence on the input signal frequency. The INL model is subtracted from the digital output for postcorrection. The static compensation is implemented with a look-up-table. The dynamic calibration is performed by a bank of frequency domain filters using an overlap-add structure. Two ADCs of the same type (Analog Devices AD9430) are compensated for in the first three Nyquist bands. The performance improvements in terms of spurious-free dynamic range and intermodulation distortion are investigated. Using the proposed method, improvements up to 17 dB are reported in favorable scenarios.

Place, publisher, year, edition, pages
2013. Vol. 62, no 7, 1882-1891 p.
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:hig:diva-14914DOI: 10.1109/TIM.2013.2248289ISI: 000320129100002Scopus ID: 2-s2.0-84879067552OAI: oai:DiVA.org:hig-14914DiVA: diva2:637489
Available from: 2013-07-18 Created: 2013-07-18 Last updated: 2017-12-06Bibliographically approved

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