Edge pursuit comparator with application in a 74.1dB SNDR, 20KS/s 15b SAR ADC

Minseob Shim, Seokhyeon Jeong, Paul Myers, Suyoung Bang, Junhua Shen, Chulwoo Kim, Dennis Sylvester, David Blaauw, Wanyeong Jung

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

    Abstract

    This paper presents a new energy-efficient ring oscillator collapse-based comparator, which is called edge-pursuit comparator (EPC) and demonstrated it in a 15-bit SAR ADC. The comparator automatically adjusts the performance according to its input difference without any control, eliminating unnecessary energy spent on coarse comparisons. The employed SAR ADC supplements a 10-bit differential main CDAC with a 5-bit common-mode CDAC which uses common to differential gain tuning to improves linearity by reducing the effect of switch parasitic capacitance. A test chip fabricated in 40nm CMOS shows 74.12 dB SNDR and 173.4 dB FOMs. The comparator consumes 104 nW with the full ADC consuming 1.17 μW.

    Original languageEnglish
    Title of host publicationASP-DAC 2018 - 23rd Asia and South Pacific Design Automation Conference, Proceedings
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Pages295-296
    Number of pages2
    ISBN (Electronic)9781509006021
    DOIs
    Publication statusPublished - 2018 Feb 20
    Event23rd Asia and South Pacific Design Automation Conference, ASP-DAC 2018 - Jeju, Korea, Republic of
    Duration: 2018 Jan 222018 Jan 25

    Publication series

    NameProceedings of the Asia and South Pacific Design Automation Conference, ASP-DAC
    Volume2018-January

    Other

    Other23rd Asia and South Pacific Design Automation Conference, ASP-DAC 2018
    Country/TerritoryKorea, Republic of
    CityJeju
    Period18/1/2218/1/25

    Bibliographical note

    Funding Information:
    The authors thank TSMC University Shuttle Program for chip fabrication and Analog Devices for partial financial support.

    Publisher Copyright:
    © 2018 IEEE.

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering
    • Computer Science Applications
    • Computer Graphics and Computer-Aided Design

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