The impact of combined channel mismatch effects in time-interleaved ADCs
The impact of combined channel mismatch effects in time-interleaved ADCs
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DOI：
10.1109/tim.2004.834046
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发表时间：
2005-01
影响因子：
5.6
通讯作者：
Christian Vogel
中科院分区：
文献类型：
--
作者：
Christian Vogel
时间交错多通道模数转换器（ADC）实现了高采样率，但缺点是由通道失配引起的附加失真。在本文中，我们考虑信号与噪声和失真比（SINAD）对几种不同通道失配效应组合的依赖性。通过使用显式给定的失配参数或给定的参数分布，我们推导出封闭形式的方程计算显式或预期的SINAD为任意数量的通道。此外，我们扩展了显式的SINAD的定时抖动的影响。我们阐明了通道不匹配如何相互作用，并对单个不匹配错误的显式SINAD进行最坏情况分析。我们还表明，方程描述预期的SINAD的个别失配误差是我们的一般配方的特殊情况。我们指出如何使用预期的SINAD找到有效的优化优先级，并证明了最坏情况下分析的重要性。
A time-interleaved multichannel analog-to-digital converter (ADC) achieves high sampling rates with the drawback of additional distortions caused by channel mismatches. In this paper, we consider the dependency of the signal-to-noise-and-distortion ratio (SINAD) on the combination of several different channel mismatch effects. By using either explicitly given mismatch parameters or given parameter distributions, we derive closed-form equations for calculating the explicit or the expected SINAD for an arbitrary number of channels. Furthermore, we extend the explicit SINAD by the impact of timing jitter. We clarify how channel mismatches interact and perform a worst case analysis of the explicit SINAD for individual mismatch errors. We also show that equations describing the expected SINAD of individual mismatch errors are special cases of our general formulation. We indicate how to use the expected SINAD for finding efficient optimization priorities and demonstrate the importance of worst case analyses.