Adaptive semiblind background calibration of timing mismatches in a two-channel time-interleaved analog-to-digital converter

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• 作者：Sujuan Liu ; Ning Lv ; Haixiao Ma ; Anding Zhu
• 关键词：Time ; interleaved analog ; to ; digital converter (TIADC) ; Timing mismatches ; Calibration ; Semiblind ; Test tone
• 刊名：Analog Integrated Circuits and Signal Processing
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：90
• 期：1
• 页码：1-7
• 全文大小：
• 刊物类别：Engineering
• 刊物主题：Circuits and Systems; Electrical Engineering; Signal,Image and Speech Processing;
• 出版者：Springer US
• ISSN：1573-1979
• 卷排序：90

文摘

This paper introduces an adaptive semiblind background calibration of timing mismatches in a two-channel time-interleaved analog-to-digital converter (TIADC). By injecting a test tone at the frequency of half the overall sampling frequency of TIADC, the timing mismatch between two sub-ADCs can be quickly estimated with great accuracy without affecting the normal operation of the TIADC. The estimated coefficient can then be used in compensation module formed by a fixed structure to calibrate the timing mismatches. Simulation results demonstrate the effectiveness of the proposed estimation and correction technique.