A touch sensor readout circuit using switched- capacitor charge pump

IEICE Electronics Express

Yong-Min Lee²  Ho-Young Park³  Sang-Hyeok Yang³  Kye-Shin Lee¹  Suki Kim³ 

[1] Department of Electrical and Computer Engineering, The University of Akron;Department of Information Display, Sun Moon University;Department of Electrical Engineering, Korea University

关键词: charge pump;    switched-capacitor;    touch panel;    touch sensor;   

DOI  :  10.1587/elex.9.1090

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(5)This paper presents an on-chip touch sensor readout circuit using charge pump based switched-capacitor scheme. For the proposed touch sensor readout circuit, the touch panel capacitance is directly converted into a voltage level by the switched-capacitor charge pump, which does not require additional signal conditioning for detection. The additional circuitry following the charge pump such as the comparator and flip-flop does not consume any static current. Therefore, the suggested touch sensor can lead to a compact and low power on-chip solution with fast detection time. The prototype circuit is fabricated using CMOS 0.35µm technology, where the consumption current is only 2.2µA.

【 授权许可】

Unknown