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Power-up calibration techniques for double-sampling ΔΣ modulators

Power-up calibration techniques for double-sampling ΔΣ modulators

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Two new start-up DAC calibration techniques are proposed for double-sampling ΔΣ modulators. The first one is a modification of the existing calibration technique, while the second technique is proposed specifically for double-sampling ΔΣ modulators. Dynamic element matching is used to eliminate ‘intra-DAC’ mismatches, and digital correction for the remaining ‘inter-DAC’ mismatches.

References

    1. 1)
      • R.T. Baird , T.S. Fiez . Linearity enhancement of A/D and D/A converters using data weighted averaging. IEEE Trans. Circuits Syst. II , 12 , 753 - 762
    2. 2)
      • Markus, J., Deval, P., Quiquempoix, V., Silva, J., Temes, G.C.: `Incremental delta-sigma structures for DC measurements: an overview', IEEE Custom IC Conf., September 2006, p. 41–48.
    3. 3)
      • M. Sarhang-Nejad , G.C. Temes . A high-resolution multibit ΣΔ ADC with digital correction and relaxed amplifier requirements. IEEE J. Solid-State Circuits , 6 , 648 - 660
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