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A Mutual Capacitance Touch Readout IC With 64x0025 Reduced-Power Adiabatic Drivi
提出一种采用绝热驱动技术的低功耗互电容触摸读取IC，显著降低功耗并提升抗干扰能力。
180nm CMOS, 17.8mW, 57.0dB SNR@120fps
互电容触摸绝热驱动电荷回收显示噪声消除低功耗AFE
▸基于电荷回收的绝热多驱动方法
▸全差分触摸感应模块消除显示噪声干扰
▸四路复用传感模块优化转换时间
Abstract
This paper presents a touch sensing analog front
end (AFE) for capacitive touch-screen integrated into an ultra-
thin display. Reduced distance between the touch screen and
display causes large capacitive coupling, resulting in increased
parasitic capacitance and reduced touch sensitivity. Display noise
interference is worse due to the large coupling capacitance.
Hence, it is a challenge to design an AFE capable of accurate and
energy efficient sensing of a touch input in the integrated touch-
sc