1753-IB16XOB8
1753-IB16XOB8
1753-IB16XOB8
由于噪声源众多，因此触摸屏控制器需要适应于在既定时间内系统中存在的不同噪声大小和类型。要确保具有高稳健性的抗噪性，关注的因素就是信噪比（SNR）。我们可通过以下几种不同特性来提高信噪比。
提高信噪比的主要方法就是采用非常高的发射电压来扫描触摸屏的传感器。原始SNR与发射电压成正比，因而越大越好。过去，高电压发射对于许多触摸屏控制器来说都一直是个挑战，只能通过采用外部高电压模拟电源（有时这会大幅增加功耗，而且大多数消费类手持设备都无法支持）才能支持，或者需采用较大且昂贵的外部组件，如开关稳压器等。上述两种方法都会额外增加设备的成本。而现在，触摸屏控制器能通过内部电荷泵生成片上高电压发射。
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