在模拟电路中,人体类似一个巨大的信号源,可以给任何模拟放大电路提供一个频谱范围很宽的信号,任何频率的信号都可很轻易地通过电容器。而触摸感应式操作面板主要利用的是交流电的“电容交流耦合”原理,大致工作原理简图如图1所示。当手指触摸到指定感应区域时,人体和金属感应片便组成了一个等效电容器(电容介质就是陶瓷面板),人 In the analog circuit, the human body is like a huge signal source, can provide any analog amplifier circuit with a wide spectrum of signals, any frequency signal can easily through the capacitor. The touch-sensitive operating panel is mainly used AC AC “capacitor AC coupling ” principle, the general principle of the schematic diagram shown in Figure 1. When the finger touches the designated sensing area, the human body and the metal sensing plate form an equivalent capacitor (the dielectric medium is the ceramic panel), the human