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Digital correction of frequency response mismatches in 2-channel time-interleaved ADCs using adaptive I/Q signal processing

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Details

Original languageEnglish
Pages (from-to)543-555
Number of pages13
JournalAnalog Integrated Circuits and Signal Processing
Volume82
Issue number3
DOIs
Publication statusPublished - 2015
Publication typeA1 Journal article-refereed

Abstract

A novel adaptive compensation architecture for the frequency response mismatch of 2-channel time-interleaved ADC (TI-ADC) is proposed for developing high-performance self-adaptive systems. The proposed approach overcomes the existing methods in the sense that the TI-ADC mismatch identification can be performed without allocating a region where only the TI-ADC mismatch spurs are present. This is accomplished via mapping the TI-ADC problem into an I/Q mismatch problem which allows deploying complex statistical signal processing. As proof of concept, the compensation architecture is demonstrated and tested on a 16-bit TI-ADC measured hardware data.

Keywords

  • Circularity, Complex I/Q signal processing, Digitally assisted analog (DASA), Frequency response mismatch identification, Time-interleaved ADC

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