1
Harald Philipp: Time domain capacitive field detector. David Kiewit, March 24, 1998: US05730165 (672 worldwide citation)

A capacitive field sensor, which may be used for the control of a water supply valve in a basin or fountain, employs a single coupling plate to detect a change in capacitance to ground. The apparatus comprises a circuit for charging a sensing electrode and a switching element acting to remove charge ...


2
TECHNIQUE FOR CANCELING UNWANTED CAPACITIVE EFFECTS IN A CAPACITIVE TOUCH INTERFACE, AND RELATED SYSTEMS, METHODS, AND DEVICES. November 22, 2018: US20180335872-A1

The embodiments of the present disclosure relate generally to systems and methods for canceling mutual capacitive effects in a capacitive touch interface, and more specifically, implementing a driven shield using rail-to-rail voltage.