Patent ID: 8514114

Claim:
An analog-to-digital converter (ADC) for converting an input signal to a multi-bit digital code, comprising: a converter element array comprising: for a first range of least significant bits of the digital code, a plurality of converter elements, at least one converter element provided for each bit in the first range, for a second range of most significant bits of the digital code, a plurality of converter elements provided for each bit in the second range, and a switch control of the converter element array individually switching each of the converter elements in the second range at least once between two reference potentials; and a comparator coupled to the converter element array capable of generating digital output codes from output signals at converter elements in the first range corresponding to each of the two reference potentials individually applied to the converter elements in the second range, wherein the switch control individually switches each of the converter elements between the two reference potentials to individually calibrate each of the converter elements and wherein each respective generated digital output code is a calibration value for a respective converter element in the second range that is subsequently used to correct an output of the respective converter element.