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该论文提出了一种用于触摸控制器的100通道可配置模拟前端，支持85至385Hz的帧率，旨在解决大尺寸触摸屏中充电器噪声等共模电源噪声导致的触摸检测性能下降问题。通过差分传感等方法增强噪声抑制能力，提高了触摸检测的准确性。
tablet PCs and home appliances that have touch-screen panels (TSPs) larger than 10 inches. However, there are many sources of noise that affect touch detection, and some of these noise sources, such as charger noise, significantly affect the capacitance variation needed to detect touch input and lead to inaccurate touch detection [1-2]. For example, as shown in Fig. 11.6.1, common-mode supply noise results in large peak-to-peak noise injection over 10Vpp and deteriorates touch-detection performance. Although rejection of display noise using the differential sensing method [3] has been investigated, sufficient attenuation of the injected noise through a touch object remains a problem. In this paper, we present an analog front-end (AFE) with noise immunity of up to 20Vpp for a large TSP controller. To improve the immunity to
Jun-Eun Park, Jiheon Park, Young-Ha Hwang, Jonghyun Oh, Deog-Kyoon Jeong
Seoul National University, Seoul, Korea Touch screens have recently been adopted not only for smartphones but also for