Patent ID: 8854059
Filing Date: 2014-10-07
Classification: G01D,G01R,G06F

Abstract:
1. An apparatus comprising: a capacitive touch screen panel; an active gain control circuit having: a successive approximation register (SAR) analog-to-digital converter (ADC) having: an active gain, wherein the node further comprises a first node, and wherein the capacitive touch screen panel further comprises a plurality of sensing capacitors that are arranged in an array having a plurality of rows and a plurality of columns, wherein each column is associated with at least one of a plurality of second nodes, and wherein each sensing capacitor for each column is coupled to its associated second node, wherein the first switching circuit further comprises: a plurality of first switches, wherein each first switch is coupled between at least one of the second nodes and a third node; and a plurality of second switches, wherein each second switch is coupled between the third node and at least one of the plurality of weighted capacitors, wherein the third node is part of the capacitive touch screen panel.