关键词: key switch, key scan, switch matrix, controller, baseband, passive, conventional, power spectrum density, PSD, electro magnetic interference, EMI, debounce, row, column, port
摘要:本应用笔记介绍和比较两个键扫描在智能手机的关键垫常用的方法。这表明,省去了EMI滤波器使用低EMI方法的好处。估计也与ESD保护二极管的电容负载津贴。
![](http://uphotos.eepw.com.cn/soothmusic/pics/03660905292735246c4839a728d83912.jpg)