A capacitive touch panel system (10) having a faceplate (14) with an electrically conductive layer (20) of a consistent resistivity employs a position measurement apparatus (12) to generate an address signal indicative of a position (46) on the faceplate in contact with a stylus (48). The position measurement...http://www.google.com/patents/US4922061?utm_source=gb-gplus-sharePatent US4922061 - Capacitive touch panel system with randomly modulated position measurement signal
