NDLI: A highly area-efficient controller for capacitive touch screen panel systems

Content Provider	IEEE Xplore Digital Library
Author	Tong-Hun Hwang Wen-Hai Cui Ik-Seok Yang Oh-Kyong Kwon
Copyright Year	1975
Abstract	In this paper, a highly area-efficient controller for capacitive touch screen panels (TSPs) is proposed. The proposed controller uses a 10-bit successive approximation register analog-to-digital converter (SAR ADC) with an adder to compensate for the capacitance variation in the TSP and for the offset voltage variation in the charge amplifier of the sensing circuit. By using the proposed compensation method, the area of the controller can be reduced by 90.3% of the area of the conventional controllers. The measurement results showed that the signal-to-noise ratio (SNR) of the controller increases from 12.5 to 21.3 dB after compensation. Also, its spatial jitter decreases from ±1.5 to ±0.46 mm, which is 7% of the sensor pitch of 8 mm.
Sponsorship	IEEE Consumer Electronics Society
File Size	2031717
File Format	PDF
ISSN	00983063
Volume Number	56
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-05-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Control systems Capacitance Tactile sensors Optical amplifiers Displays Commercialization Analog-digital conversion Adders Circuits Mobile handsets Projected capacitive touch screen panel, compensation technique, mutual capacitance, successive approximation register analog-to-digital converter
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Media Technology

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