A frequency independent method for adaptive correction of Time Interleaved Analog to Digital Converters

Antoine Bonnetat, Jean-Michel Hodé, Dominique Dallet, Guillaume Ferré

Abstract

Time-Interleaved Analog-to-Digital Converters (TIADC) are well-known as an efficient solution to increase sampling rate. However manufacturing process introduces static errors which limit TIADC performance. In this paper, we propose to improve an existing method based on a fully blind digital solution using an adaptive least mean squares (LMS) filter to correct gain, offset and timing mismatch. Indeed, due to interpolation operation, that solution was not frequency independent. Therefore we propose a novel architecture which is still based on adaptive filtering while dealing with frequency limitation. Numerical simulation results will be provided to validate the efficiency of our method.

Keywords

ADC, TI-ADC, LMS filtering, Interleaved mismatches correction

Download

IMEKO-TC4-2013-148.pdf

DOI

-

IMEKO TC

TC4 - Measurement of Electrical Quantities

Back to the proceedings