Patent ID: 8988362
Filing Date: 2015-03-24
Classification: G06F

Abstract:
1. A circuit for a capacitive touch sensor, wherein the capacitive touch sensor includes a plurality of traces, the circuit comprising: n number channels; a multiplexer connected to the n number of channels, for selecting n number of adjacent traces from the plurality of traces to connect to the n number of channels; and a front-end circuit connected to the n number of channels, for simultaneously detecting the n number of adjacent traces to extract analog-to-digital conversion values therefrom, wherein the front-end circuit selects a target trace having a maximum analog-to-digital conversion value corresponding to a touch point from the plurality of traces after all of the plurality of traces are scanned, and then p number of adjacent traces including the target trace, and a noise equalizer connected to the front-end circuit, for performing noise equalization over the analog-to-digital conversion values of the p number of adjacent traces after the p number of adjacent traces are scanned; wherein n and p are integers, and n≧2, p≧2; and wherein p is less than a number of the plurality of traces.