Capacitance sensing circuits and methods

摘要

A capacitance sense system can include a capacitance sense input configured to receive an input signal that varies according to a sensed capacitance; an integrator/discharge circuit configured to integrate the input signal and discharge the integrated input signal toward the reference level in conversion operations; and a remainder retainer section configured to quantize the discharging of the integrated input signal, and retain any remainder of the integrated input signal that follows a quantization point for a next conversion by the integrator/discharge circuit.

主权项

1. A capacitance sense system, comprising:
a capacitance sense input configured to receive an input signal that varies according to a sensed capacitance; an integration/quantization module configured to integrate the input signal and convert the integrated signal to a digital value; and a remainder retainer module configured to retain any remainder of the integrated input signal not used for conversion of the integrated signal to the digital value.