All-Digital Background Calibration Technique for Offset, Gain and Timing Mismatches in Time-Interleaved ADCs

Q2 Engineering
Van-Thanh Ta, Van‐Phuc Hoang, X. Tran
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引用次数: 5

Abstract

This paper presents a method for all-digital background calibration of multiple channel mismatches including offset, gain and timing mismatches in time-interleaved analog to digital converters (TIADCs). The averaging technique is used to remove the offset mismatch at each channel. The gain mismatch is calibrated by calculating the power ratio of the subADC over the reference ADC. Timing skew is compensated by using Hadamard transform for error correction and least mean squares (LMS) algorithm for estimation of the clock skew. The performance improvement of TIADCs employing these techniques is demonstrated through numerical simulations.
时间交错adc中失调、增益和时序失配的全数字背景校正技术
提出了一种针对时间交错模数转换器(tiadc)中多通道失调(包括偏置、增益和时序失调)的全数字背景校正方法。平均技术用于消除每个通道的偏移不匹配。通过计算子ADC与参考ADC的功率比来校准增益失配。采用Hadamard变换进行误差校正,采用最小均方算法对时钟偏差进行估计,对时钟偏差进行补偿。通过数值模拟证明了采用这些技术对tiadc性能的改善。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
4.00
自引率
0.00%
发文量
15
审稿时长
10 weeks
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