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One-Bit Sigma Delta-Encoded Stimulus Generation for On-Chip ADC Test
Linköping University, Department of Electrical Engineering. Linköping University, Faculty of Science & Engineering. Univ Management & Technol, Pakistan.
Linköping University, Department of Electrical Engineering, Communication Systems. Linköping University, Faculty of Science & Engineering.
2020 (English)In: Journal of Circuits, Systems and Computers, ISSN 0218-1266, Vol. 29, no 15, article id 2050245Article in journal (Refereed) Published
Abstract [en]

This paper presents an application of the Sigma Delta modulation technique to the on-chip dynamic test for analog-to-digital converters (ADCs). The required stimulus such as a single- or two-tone signal is encoded into one-bit Sigma Delta sequence, which is applied to an ADC under test through a driving buffer and a simple low-pass reconstruction filter. By a systematic approach, we select the order and type of a Sigma Delta modulator and develop a frequency plan suitable for the spectral measurement. In this way, we achieve a high dynamic range suitable for spectral harmonic and intermodulation distortion tests for ADCs. For high frequency measurements (up to the Nyquist frequency), we propose a novel low-pass/band-pass modulation scheme that allows to avoid harmful effects of the low-frequency quantization noise. Also we address the distortion components which originate from the buffer imperfections for a nonreturn-to-zero waveform representing the encoded stimulus. We show that the low-frequency distortion components can be cancelled by using a simple iterative predistortion technique supported by measurements with a DC-calibrated ADC. By correlation between low- and high-frequency components also the high frequency distortions can be largely reduced. The presented techniques are illustrated by simulation results of an ADC under test.

Place, publisher, year, edition, pages
WORLD SCIENTIFIC PUBL CO PTE LTD , 2020. Vol. 29, no 15, article id 2050245
Keywords [en]
Stimulus generation; on-chip test; BiST; Sigma Delta modulator; ADC dynamic test; HD/IM test; predistortion
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:liu:diva-172409DOI: 10.1142/S021812662050245XISI: 000599934000003Scopus ID: 2-s2.0-85091611110OAI: oai:DiVA.org:liu-172409DiVA, id: diva2:1515599
Available from: 2021-01-10 Created: 2021-01-10 Last updated: 2021-01-13Bibliographically approved

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Ahmad, ShakeelDabrowski, Jerzy
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CiteExportLink to record
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Citation style
  • apa
  • ieee
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Language
  • de-DE
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Output format
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