A timing mismatch calibration method for time-interleaved ADC based on spectral characteristics - 文章详情页

作者：

Liu, Su-Juan (Liu, Su-Juan.) | Qi, Pei-Pei (Qi, Pei-Pei.) | Jiang, Wen-Shu (Jiang, Wen-Shu.) | Zhang, Mei-Hui (Zhang, Mei-Hui.) | Wang, Jun-Shan (Wang, Jun-Shan.)

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EI Scopus PKU CSCD

摘要：

Timing　mismatches　in　time-interleaved　ADCs　(TIADC)　greatly　degrade　the　spurious-free　dynamic　range　(SFDR)　of　this　system.　For　calibrating　timing　mismatches,　based　on　the　spectra　relation　between　the　analog　input　signal　and　the　output　signal　of　the　TIADC　system,　a　blind　timing　mismatch　calibration　algorithm　is　proposed　by　eliminating　the　error　signal　in　the　output　signal.　By　expanding　the　frequency　expression　of　output　signal　in　Taylor　approximation,　this　algorithm　can　construct　the　ideal　output　signal.　By　introducing　least　mean　square　(LMS)　for　estimating　timing　mismatch,　this　proposed　algorithm　is　aimed　at　reducing　the　complexity　of　hardware　and　improving　the　accuracy　of　calibration　algorithms.　Experiments　show　that　this　algorithm　can　easily　extend　to　an　arbitrary　number　of　channels　and　improve　the　SFDR　of　the　output　signal　about　47dB.　©,　2015,　Chinese　Institute　of　Electronics.　All　right　reserved.

关键词：

Analog to digital conversion Approximation algorithms Calibration Timing circuits

作者机构：

[ 1 ] [Liu, Su-Juan]College of Electronic Information and Control Engineering, Beijing University of Technology, Beijing; 100124, China
[ 2 ] [Qi, Pei-Pei]College of Electronic Information and Control Engineering, Beijing University of Technology, Beijing; 100124, China
[ 3 ] [Jiang, Wen-Shu]College of Electronic Information and Control Engineering, Beijing University of Technology, Beijing; 100124, China
[ 4 ] [Zhang, Mei-Hui]College of Electronic Information and Control Engineering, Beijing University of Technology, Beijing; 100124, China
[ 5 ] [Wang, Jun-Shan]College of Electronic Information and Control Engineering, Beijing University of Technology, Beijing; 100124, China

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