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Ultra-low Power Charge-Pump-Based Bandgap References

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Abstract

This paper presents a 48 nW, − 60 dB PSRR@ DC, switched capacitor bandgap reference circuit operational from 500 mV V DD . The design uses a switched capacitor network for the architecture, where instead of resistors, switching capacitors are used for generating the reference. A charge-pump network is used to reduce the minimum V DD required to operate the circuit. Compared to the prior work, this design improves the PSRR well over − 60 dB by using current source architecture. Measurement result shows a 1 mV change in output voltage for a 4.9 V change in V DD for a high-voltage version of the design. It achieves a stability of 45 ppm/∘C at an output voltage of 500 mV. We also present the theoretical background of the charge-pump-based bandgap while reviewing prior low-voltage bandgap circuits.

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Authors and Affiliations

  1. Northeastern University, Boston, MA, USA

    Shikhar Tewari & Aatmesh Shrivastava

Authors
  1. Shikhar Tewari
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  2. Aatmesh Shrivastava
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Correspondence to Aatmesh Shrivastava .

Editor information

Editors and Affiliations

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

    Pieter Harpe

  2. Department of Microelectronics, Delft University of Technology, Delft, Zuid-Holland, The Netherlands

    Kofi A. A. Makinwa

  3. Department of Physics G. Occhialini, University of Milan, Milano, Italy

    Andrea Baschirotto

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Tewari, S., Shrivastava, A. (2018). Ultra-low Power Charge-Pump-Based Bandgap References. In: Harpe, P., Makinwa, K., Baschirotto, A. (eds) Hybrid ADCs, Smart Sensors for the IoT, and Sub-1V & Advanced Node Analog Circuit Design. Springer, Cham. https://doi.org/10.1007/978-3-319-61285-0_12

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  • DOI: https://doi.org/10.1007/978-3-319-61285-0_12

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-61284-3

  • Online ISBN: 978-3-319-61285-0

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