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首页> 外文期刊>IEEE transactions on circuits and systems . I , Regular papers >Algorithmic ADC Offset Compensation by Nonwhite Data Chopping: System Model and Basic Theoretical Results
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Algorithmic ADC Offset Compensation by Nonwhite Data Chopping: System Model and Basic Theoretical Results

机译:非白色数据斩波的算法ADC失调补偿:系统模型和基本理论结果

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This paper is devoted to show the impact of nonwhite chopping on the offset compensation in time-interleaved analog-to-digital converters. We develop a theoretical framework allowing the selection of optimal chopping sequences. We show that, on the one hand, the adoption of these (generally nonwhite) sequences allows to achieve faster offset compensation (thus increasing the signal-to-noise ratio) and, on the other hand, a better spectral shaping (thus increasing the spurious-free dynamic range). As a byproduct of our analysis, we prove that the average offset estimation which is used in many ADC implementations is asymptotically the best available linear estimation of offset that, in turn, is the best estimation when the signal to be converted can be assumed to be a Gaussian process.
机译:本文致力于展示非白斩波对时间交错模数转换器中失调补偿的影响。我们开发了一个理论框架,可以选择最佳的切碎顺序。我们表明,一方面,采用这些(通常是非白色的)序列可以实现更快的偏移补偿(从而提高信噪比),另一方面,可以实现更好的频谱整形(从而提高噪声补偿)。无杂散的动态范围)。作为我们分析的副产品,我们证明了许多ADC实现中使用的平均偏移估计渐近是偏移的最佳可用线性估计,进而可以假定当要转换的信号为时的最佳估计。高斯过程。

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