Patent Document ID: 9268441
Application ID: 13249514
Patent Flag: 1

Claim One:
1. A circuit comprising: an active integrator configured to measure a capacitance of a touch sense array, wherein the active integrator is configured to receive from the touch sense array a response signal comprising a positive portion and a negative portion, wherein the response signal is representative of a presence or an absence of a conductive object proximate to the touch sense array, the active integrator comprising a first integrating capacitor, and a second integrating capacitor, wherein the first integrating capacitor or the second integrating capacitor are configured to be alternately coupled in a feedback configuration between an output terminal of the active integrator and a first input terminal of the active integrator, the first integrating capacitor in the feedback configuration to integrate the positive portion of the response signal and the second integrating capacitor in the feedback configuration to integrate the negative portion of the response signal.