A voltage scaling 0.25-1.8 v delta-sigma modulator with inverter-opamp self-configuring amplifier

Kentaro Yoshioka, Yosuke Toyama, Teruo Jyo, Hiroki Ishikuro

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Citation (Scopus)

    Abstract

    A 2nd order discrete time (DT) ΔΣ modulator with very wide supply voltage range of 0.25-1.8 V is presented. An inverter-opamp self-configuring amplifier (IOSA) is proposed with sufficient gain through sub-threshold to strong inversion region. The amplifier senses the supply voltage and automatically configures either to operate as an inverter or an opamp. The prototype ADC fabricated in 180nm CMOS achieved SNDR of 53dB at a supply voltage of 0.3V and a best FoM of 0.09 pJ/step. At 1.8 V supply the modulator achieves SNDR 61dB and operates down to 0.25V.

    Original languageEnglish
    Title of host publication2013 IEEE International Symposium on Circuits and Systems, ISCAS 2013
    Pages809-812
    Number of pages4
    DOIs
    Publication statusPublished - 2013 Sep 9
    Event2013 IEEE International Symposium on Circuits and Systems, ISCAS 2013 - Beijing, China
    Duration: 2013 May 192013 May 23

    Publication series

    NameProceedings - IEEE International Symposium on Circuits and Systems
    ISSN (Print)0271-4310

    Other

    Other2013 IEEE International Symposium on Circuits and Systems, ISCAS 2013
    CountryChina
    CityBeijing
    Period13/5/1913/5/23

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering

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  • Cite this

    Yoshioka, K., Toyama, Y., Jyo, T., & Ishikuro, H. (2013). A voltage scaling 0.25-1.8 v delta-sigma modulator with inverter-opamp self-configuring amplifier. In 2013 IEEE International Symposium on Circuits and Systems, ISCAS 2013 (pp. 809-812). [6571970] (Proceedings - IEEE International Symposium on Circuits and Systems). https://doi.org/10.1109/ISCAS.2013.6571970