System and method for measuring a capacitance by...

Details System and method for measuring a capacitance by... System and method for measuring a capacitance by...

2011-01-04

2011-01-04

Natalini, Jeff (Department: 2831)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

C324S663000

Reexamination Certificate

active

07863909

ABSTRACT:
A touch sensor device and method is provided that determines measurable capacitances for object detection. The systems and methods measure capacitance by controllably transferring charge from a storage capacitor, and determining the measurable capacitance by measuring the residual voltage remaining on the storage capacitor after the transfer. The systems and methods thus provide an accurate determination of the measurable capacitance that can be used for object proximity sensing.

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Fiorenza, John K., “Comparator-Based Switched-Capacitor Circuits for Scaled CMOS Technologies,” IEEE Journal of Solid-State Circuits, vol. 41, No. 12, Dec. 2006, pp. 2658-2668.

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