New static and dynamic digital error correction and adaptation techniques for SAR and pipeline AD converters

Abstract

In this paper, two digital error correction and adaptation schemes are presented with measured results. The first one is a static gain error correction, that is adapted by collecting in the background of normal operation a few bins of amplitude histogram data around the major bit transitions. The other experiment implements both a static gain correction and a simple dynamic error correction into a normal 1.5-bit/stage pipeline ADC. Finally, a digital training circuit for real time experimenting of different error correction schemes is presented.