Patent ID: 9013442
Filing Date: 2015-04-21
Classification: G06F

Abstract:
1. An apparatus for detecting touch events, comprising: one or more receive channels couplable to one or more touch sensors, the one or more receive channels configurable for generating distinct values representative of the touch events by converting inputted analog waveforms into respective digital representations using a binary search; wherein at least one receive channel includes a charge redistribution successive approximation register (SAR) analog to digital converter (ADC) with a dynamic input range; wherein the dynamic input range of the SAR ADC is made up of a dynamic input range top end voltage and a dynamic input range bottom end voltage; and wherein at least one charge redistribution SAR ADC includes a first capacitor and a second capacitor, the first and second capacitors configurable for i) scaling the dynamic input range of the SAR ADC; and ii) offsetting the dynamic input range by shifting the dynamic input range relative to a reference voltage.