An apparatus and method of converting a capacitance mea Sured on a sensor element to a
digital value. The apparatus may include a matrix-Scanning device including drive lines and …

4,918,262 A 4, 1990 Flowers et al. 4,935,728 A 6/1990 Kley 5,239,140 A 8, 1993 Kuroda et
al. 5,374,787 A 12/1994 Miller et al. 5,386,584 A 1/1995 Verstegen et al. 5,412,387 A 5/1995 …

A switch multiplexer device comprises a plurality of analog switches, and an embedded
digital sequencer in operative communication with the analog switches. The embedded …

In an example, an input device includes a substrate and an elastomeric material. The
substrate includes a plurality of sensor electrodes disposed thereon. The elastomeric …

A guard ring is provided around each capacitive sensor plate and charged to substantially
the same voltage as a voltage on the capacitive sensor plate. The guard ring reduces …

Provided are a device for driving a touch pad, including: an input unit that receives an
electrical signal be touching from channels of the touch pad; and a control logic unit that …

A capacitor having air dielectric between its plates may be used to detect the presence of
smoke and other contaminants in the dielectric air passing over the plates of the capacitor …

A method may include receiving an input signal from a force sensor configured to sense a
force associated with a human interaction with a virtual button, comparing the input signal to …

BACKGROUND Computing devices, such as notebook computers, personal data assistants
(PDAs), kiosks, and mobile handsets, have user interface devices, which are also known as …

A microcontroller measures capacitance of capacitive sensors having guard rings
associated therewith. A guard ring is provided around each capacitive sensor plate and is …