A quasi-differential C-V convertor for touch screen panel controller IC

Byeonghak Jo, Soo Won Kim, Moonsuk Jeong, Youngil Kwon, Tahjun Park

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

    Abstract

    A capacitance to voltage convertor for a five-inch touch screen panel is designed. In this paper, a new quasidifferential buffer is proposed to be robust with respect to display noise and highly area efficient. The measurement results show that the signal-to-noise ratio is 29.8 dB when evaluated with a 3.7-inch add-on touch screen panel and LCD display. The proposed circuit, fabricated via TSMC 0.18 um 1P6M CMOS process technology with embedded flash memory and total chip areas, is 2.8 mm × 3.2 mm, including digital block. It consumes 17.8 mW of power from a 3.3 V supply at an 80 Hz scan rate for normal operation, and 2.6 mW at 20 Hz for idle operation.

    Original languageEnglish
    Title of host publicationTENCON 2014 - 2014 IEEE Region 10 Conference
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    ISBN (Electronic)9781479940752
    DOIs
    Publication statusPublished - 2015 Jan 26
    Event2014 IEEE Region 10 Conference, TENCON 2014 - Bangkok, Thailand
    Duration: 2014 Oct 222014 Oct 25

    Publication series

    NameIEEE Region 10 Annual International Conference, Proceedings/TENCON
    Volume2015-January
    ISSN (Print)2159-3442
    ISSN (Electronic)2159-3450

    Other

    Other2014 IEEE Region 10 Conference, TENCON 2014
    Country/TerritoryThailand
    CityBangkok
    Period14/10/2214/10/25

    Bibliographical note

    Publisher Copyright:
    © 2014 IEEE.

    Keywords

    • C-V converter
    • Capacitive sensing circuit
    • add-on type touch screen panel
    • readout circuits

    ASJC Scopus subject areas

    • Computer Science Applications
    • Electrical and Electronic Engineering

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