Importance

Loading Importance Indicators...

Abstract

A touch signal gain control apparatus includes an analog gain stage, a digital gain stage, a gain control module, and a comparing module. The analog gain stage and digital gain stage are coupled to the input terminal and output terminal of an analog-digital converter. When the comparing module generates a comparing result according to a voltage signal inputted to analog gain stage, the gain control module controls analog gain stage to amplify voltage signal in an analog magnification according to comparing result to form an amplified voltage signal not over an input threshold. The analog-digital converter converts amplified voltage signal into a digital signal. The gain control module controls digital gain stage to amplify digital signal in a digital magnification according to comparing result to form an amplified digital signal. The product of analog magnification and digital magnification equals to ratio of amplified digital signal and voltage signal.

Loading the Abstract Image...

First Claim