Abstract: In accordance with an embodiment, a method for operating a successive approximation ADC comprising a first capacitor array includes measuring a first weight of an MSB-ath bit of the ADC by applying a first reference voltage to first terminals of capacitors of the first capacitor array corresponding to the MSB-ath bit, applying a second reference voltage to first terminals of capacitors of the first capacitor array corresponding to significant bits lower than the MSB-ath bit, applying the first reference voltage to first terminals of a first set of capacitors of the first capacitor array corresponding to significant bits higher than the MSB-ath bit, and applying the second reference voltage to first terminals of a second set of capacitors of the first capacitor array corresponding to the significant bits higher than the MSB-ath bit; subsequently, a weight of a capacitance of the capacitors corresponding to the MSB-ath bit is successively approximated.

Abstract: A method of operating a redundant successive approximation analog-to-digital converter (ADC) includes: sampling an input signal; and successively approximating the sampled input signal using a digital-to-analog converter (DAC) including DAC reference elements having at least one sub-binary weighted DAC reference element. Successively approximating the sampled input signal includes performing a plurality of successive approximation cycles.

Abstract: A radio frequency digital-to-analog converter (RFDAC) circuit includes an RFDAC array circuit including an array of cells arranged into a plurality of segments. Each segment of the plurality of segments is configured to process input data signals. The RFDAC array circuit is configured to process an input data based on activating a set of segments of the plurality of segments, forming a set of active segments, and when the sign of the input data is changed, deactivate a partially active segment of the set of active segments and activate a sign change segment within the RFDAC array circuit. The sign change segment includes a segment within the plurality of segments of the RFDAC array circuit that is different from the set of active segments.