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Digital excess loop delay compensation technique with embedded truncator for continuous-time delta–sigma modulators

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https://ir.library.oregonstate.edu/concern/articles/p2676x12t

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  • A novel implementation is proposed to relax the specifications of the internal feedback path for a continuous-time delta-sigma modulator. A truncator is embedded into the digital excess loop delay (ELD) compensation path. Thermometer-coded truncation is achieved by re-ordering the reference voltages of the internal quantiser. This requires only a small amount of extra digital circuitry compared to the conventional digital ELD compensation. The digital encoder controlling the digital-to-analogue converter is simple, and it only introduces a small ELD.
  • Keywords: continuous-time delta-sigma modulators, reference voltages, digital excess loop delay compensation, digital circuits, embedded truncator, extra digital circuitry, reference circuits, internal feedback path, digital-to-analogue converter, thermometer-coded truncation, thermometers, delta-sigma modulation, internal quantiser, digital encoder
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  • He, T., Zhang, Y., & Temes, G. C. (2016). Digital excess loop delay compensation technique with embedded truncator for continuous-time delta–sigma modulators. Electronics Letters, 52(1), 20-21. doi:10.1049/el.2015.1595
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  • 52
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  • 1
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