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Proceedings Paper

Blind and reference channel-based time interleaved ADC calibration schemes: a comparison
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Paper Abstract

Many digital background calibration techniques exist which correct for offset, gain, timing and bandwidth mismatches in time-interleaved (TI) ADCs. Some require an additional reference channel, whereas others are blind and rely on the presence of a band where no signal is present (usually around the Nyquist frequency) or exploit other properties of the input signal. Blind calibration techniques, which don’t use a reference channel, are suitable for correction of commercial TI-ADCs, or TI-ADC systems using commercial ADCs as channels. Techniques employing additional channels require a more complex layout (especially for the clock tree) and need an additional ADC, whose overhead cost is significant, especially for 2- or 4- channel TI-ADCs. However, we show that the estimation process is faster and more accurate when a reference channel is present, and many different error models can be used (exploiting different points in the accuracy / complexity trade-off).

Paper Details

Date Published: 27 July 2016
PDF: 9 pages
Proc. SPIE 9906, Ground-based and Airborne Telescopes VI, 990631 (27 July 2016); doi: 10.1117/12.2232969
Show Author Affiliations
Rosario F. Cimmino, Consorzio Nazionale Interuniversitario per i Transporti e la Logistica (Italy)
Francesco Centurelli, Sapienza Univ. di Roma (Italy)
Pietro Monsurrò, Sapienza Univ. di Roma (Italy)
Francesco Romano, EExSKA (Italy)
Alessandro Trifiletti, Sapienza Univ. di Roma (Italy)


Published in SPIE Proceedings Vol. 9906:
Ground-based and Airborne Telescopes VI
Helen J. Hall; Roberto Gilmozzi; Heather K. Marshall, Editor(s)

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