Projected-Capacitive Touch Systems from the Controller Point of View

By: Tim Blankenship

Abstract: Projected-capacitive touch has grown more than 100-fold in revenue since the iPhone® was introduced in 2007, and it shows no signs of slowing down. This article describes many of the design and application challenges that must be faced when integrating projected-capacitive touch into a device, with a particular focus on the importance of the controller's signal-to-noise ratio.