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Kim, Jae Joon
Circuits & Systems Design Lab (CSDL)
Research Interests
  • Integrated circuits and systems, smart sensor interfaces, wearable healthcare systems, IoT & automotive electronics, mixed-mode circuits

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A Fully-Differential Correlated Doubling Sampling Readout Circuit for Mutual-capacitance Touch Screens

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Title
A Fully-Differential Correlated Doubling Sampling Readout Circuit for Mutual-capacitance Touch Screens
Author
Kwon, KihyunKim, Sung WooBien, FranklinKim, Jae Joon
Issue Date
2015-06
Publisher
IEEK PUBLICATION CENTER
Citation
JOURNAL OF SEMICONDUCTOR TECHNOLOGY AND SCIENCE, v.15, no.3, pp.349 - 355
Abstract
A fully-differential touch-screen sensing architecture is presented to improve noise immunity and also support most multi-touch events minimizing the number of amplifiers and their silicon area. A correlated double sampling function is incorporated to reduce DC offset and low-frequency noises, and a stabilizer circuit is also embedded to minimize inherent transient fluctuations. A prototype of the proposed readout circuit was fabricated in a 0.18 mm CMOS process and its differential operation in response to various touch events was experimentally verified. With a 3.3 V supply, the current dissipation was 3.4 mA at normal operation and 140 mA in standby mode.
URI
https://scholarworks.unist.ac.kr/handle/201301/12043
URL
http://www.jsts.org/html/main.htm
DOI
10.5573/JSTS.2015.15.3.349
ISSN
1598-1657
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EE_Journal Papers
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