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45.2: A Capacitive Touchscreen Controller IC with Noise‐based Hybrid Sensing Scheme
Author(s) -
Kim KiDuk,
Choi YoonKyung,
Park Junchul,
Jung JiSung,
Byun SanHo,
Kim Bumsoo,
Kim Chadong,
Kim Jinbong,
Kim Jongseon,
Hwang Gyoocheol
Publication year - 2013
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/j.2168-0159.2013.tb06288.x
Subject(s) - demodulation , capacitive sensing , noise (video) , electronic engineering , detector , controller (irrigation) , computer science , power consumption , electrical engineering , power (physics) , engineering , physics , artificial intelligence , channel (broadcasting) , agronomy , quantum mechanics , image (mathematics) , biology
In this paper, it is presented a capacitive touch sensor IC with noise‐based hybrid sensing scheme, which provides two sensing modes with noise detector. In noiseless environment, fast power‐efficient peak‐detection sensing mode is enabled and if noise is detected, the sensing mode is switched to high‐SNR demodulation sensing mode. Therefore, it adaptively offers both fast sensing speed and high noise immunity without large power consumption. The proposed IC shows higher than 50‐dB SNR in demodulation mode and over 240‐Hz reporting rate in peak‐detection mode with 2.8‐mW analog power consumption, evaluated with 4‐inch AMOLED panel with on‐cell touch screen.