Patent ID: 8497795
Filing Date: 2013-07-30
Classification: H03M

Abstract:
1. A differential successive approximation analog to digital converter comprising: a comparator; a first plurality of capacitors coupled between a corresponding first plurality of switches and a first input of said comparator, at least one of said first capacitors being arranged to receive a first component of a differential input signal; and a second plurality of capacitors coupled between a corresponding second plurality of switches and a second input of said comparator, at least one of said second capacitors being arranged to receive a second component (Vinn) of said differential input signal, wherein said first and second plurality of switches are adapted to independently couple the corresponding capacitors to a selected one of: control circuitry adapted to sample said differential input voltage during a sample phase, and to control said first and second plurality of switches to couple each capacitor of the first and second plurality of capacitors to said third supply voltage level at the start of a voltage conversion phase.