Patent ID: 9019140
Filing Date: 2015-04-28
Classification: H03M

Abstract:
1. An analog-to-digital (A/D) converter comprising: an amplifier; a capacitor array coupled to the amplifier, wherein first ends of capacitors of the capacitor array are coupled to an input of the amplifier; a switching array coupled to second ends of the capacitors of the capacitor array and to an input terminal of the A/D converter; a first sub-A/D coupled to an output of the amplifier; and a controller configured to cause the switching array to perform a plurality of successive approximation steps to track a signal at the input terminal of the A/D converter, wherein the controller is configured to compensate for a correctable residue error made by the first sub-A/D in one of the plurality of successive approximation steps by applying an opposite error detected by the first sub-A/D in a subsequent successive approximation step.