Touch panel with adaptive noise reduction

摘要: A touch panel has scanning signals selectively applied to the four sides of a sensing surface so as establish alternating current voltage gradients in desired directions across surface. When is touched, result and are utilized by location circuit determining touch. The impedance resulting from user's may also be determined used. automatically filters an extent which varies depending upon rate movement one on subsequent location. Filtering decreased with increasing rates movement. thereby minimizes effects noise determination.