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The Zoom ADC: An Evolving Architecture

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Biomedical Electronics, Noise Shaping ADCs, and Frequency References

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Abstract

Zoom ADCs combine a coarse SAR ADC with a fine delta-sigma modulator (ΔΣM) to efficiently obtain high energy efficiency and high dynamic range. This makes them well suited for use in various instrumentation and audio applications. However, zoom ADCs also have drawbacks. The use of over-ranging in their fine modulators may limit SNDR, large out-of-band interferers may cause slope overload, and the quantization noise of their coarse ADC may leak into the baseband. This chapter presents an overview of recent advances in zoom ADCs that tackle these challenges while maintaining high energy efficiency. Prototypes designed in standard 0.16 μm technology achieve SNDRs over 100 dB in bandwidths ranging from 1 to 24 kHz while consuming only hundreds of μWs.

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Authors and Affiliations

  1. Delft University of Technology, Delft, the Netherlands

    Efraïm Eland, Shubham Mehrotra, Shoubhik Karmakar & Kofi A. A. Makinwa

  2. NXP Semiconductors, Eindhoven, the Netherlands

    Efraïm Eland, Shubham Mehrotra & Robert van Veldhoven

Authors
  1. Efraïm Eland
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  2. Shubham Mehrotra
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  3. Shoubhik Karmakar
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  4. Robert van Veldhoven
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  5. Kofi A. A. Makinwa
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Correspondence to Efraïm Eland .

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Editors and Affiliations

  1. Department of Electrical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands

    Pieter Harpe

  2. Department of Physics, University of Milan-Bicocca, Milan, Italy

    Andrea Baschirotto

  3. Department of Microelectronics, Delft University of Technology, Delft, The Netherlands

    Kofi A.A. Makinwa

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Eland, E., Mehrotra, S., Karmakar, S., van Veldhoven, R., Makinwa, K.A.A. (2023). The Zoom ADC: An Evolving Architecture. In: Harpe, P., Baschirotto, A., Makinwa, K.A. (eds) Biomedical Electronics, Noise Shaping ADCs, and Frequency References. Springer, Cham. https://doi.org/10.1007/978-3-031-28912-5_10

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  • DOI: https://doi.org/10.1007/978-3-031-28912-5_10

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  • Print ISBN: 978-3-031-28911-8

  • Online ISBN: 978-3-031-28912-5

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