Mis-Matches Minimization in 4-Channel TI-ADC using Fx-LMS Algorithm and FIR Filter Implementation

Abstract Time Interleaved Analog-to-Digital Converters are integrated components of modern electronic circuits and facilitate the digital communication technology for realizing high-speed communication systems. Current Mobile and Wireless System is one of the milestone for wireless communication requiring ADCs. TI-ADC is an useful technique for implementation of efficient receivers with large frequency band. The act of TI-ADC is practically narrowed by errors due to mismatches taking place between channels, which leads to a significant humiliation in overall performance. In this paper we are working on all the four possible mismatches can be occurred in four channel TIADC which highly degrade the system performance and these mismatches can be timing mismatches, frequency mismatches, offset mismatches, and gain mismatches. The reason of mismatch occurrences is identical TIADC ICs are not having same characteristics and these mismatches increases when multiple chips are used in a system e.g. multiple channels in TI-ADC. Here we are presenting an technique which minimizes the various mismatches in four channel TI-ADC. For achieving this, we implement FIR Band Pass Filter with Fx-LMS algorithm and this methodology significantly minimizes the affects mismatches in TI-ADC.