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

Byeonghak Jo; Soo-Won Kim; Moonsuk Jeong; Youngil Kwon; Tahjun Park

doi:10.1109/TENCON.2014.7022382

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

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

School of Electrical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 language	English
Title of host publication	IEEE Region 10 Annual International Conference, Proceedings/TENCON
Publisher	Institute of Electrical and Electronics Engineers Inc.
Volume	2015-January
ISBN (Print)	9781479940752
DOIs	https://doi.org/10.1109/TENCON.2014.7022382
Publication status	Published - 2015 Jan 26
Event	2014 IEEE Region 10 Conference, TENCON 2014 - Bangkok, Thailand Duration: 2014 Oct 22 → 2014 Oct 25

Other

Other	2014 IEEE Region 10 Conference, TENCON 2014
Country	Thailand
City	Bangkok
Period	14/10/22 → 14/10/25

Keywords

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

ASJC Scopus subject areas

Electrical and Electronic Engineering
Computer Science Applications

Access to Document

10.1109/TENCON.2014.7022382

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Cite this

A quasi-differential C-V convertor for touch screen panel controller IC. / Jo, Byeonghak; Kim, Soo-Won; Jeong, Moonsuk; Kwon, Youngil; Park, Tahjun.

IEEE Region 10 Annual International Conference, Proceedings/TENCON. Vol. 2015-January Institute of Electrical and Electronics Engineers Inc., 2015. 7022382.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Jo, B, Kim, S-W, Jeong, M, Kwon, Y & Park, T 2015, A quasi-differential C-V convertor for touch screen panel controller IC. in IEEE Region 10 Annual International Conference, Proceedings/TENCON. vol. 2015-January, 7022382, Institute of Electrical and Electronics Engineers Inc., 2014 IEEE Region 10 Conference, TENCON 2014, Bangkok, Thailand, 14/10/22. https://doi.org/10.1109/TENCON.2014.7022382

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