An adaptive calibration technique of timing skew mismatch in time-interleaved analog-to-digital converters.
An adaptive calibration technique of timing skew mismatch in time-interleaved analog-to-digital converters.
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DOI：
10.1063/1.5063660
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发表时间：
2019-02
期刊：
影响因子：
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通讯作者：
Jian Gao;P. Ye;H. Zeng;Jinpeng Song;Wentao Wei;Kuojun Yang
中科院分区：
文献类型：
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作者：
Jian Gao;P. Ye;H. Zeng;Jinpeng Song;Wentao Wei;Kuojun Yang
由于采样率的指数级增长，时间交错模数转换器（TIADC）在高速应用中得到了快速的发展。然而，通道失配误差对TIADC的性能是一个严重的挑战。在这篇文章中，我们解决了时序偏斜失配误差，并提出了一种新的自适应校准方法。阐述了标定算法的原理和工作过程。为了验证所提出的技术，我们设计了一个四通道TIADC为基础的数字示波器，采样率为10 GS/s。在此基础上，通过硬件实现了标定算法，并搭建了由先进仪器和工具组成的测试平台，验证了算法的有效性和鲁棒性。此外，仪器的技术细节是第一次描述。实验结果表明，该校正算法能有效地抑制由于时序偏差失配引起的失真。基于TIADC的仪器实现了52.48 dB的无杂散动态范围和5.83位的有效位数，分别。此外，对算法的复杂度进行了比较和讨论.
Because of the exponential increase of sampling rate, time-interleaved analog-to-digital converter (TIADC) has a fast growth in the high-speed applications. However, the channel mismatch error is a serious challenge for the performance of TIADC. In this article, we address the timing skew mismatch error and propose a novel adaptive calibration method. The principle and operating process of the calibration algorithm are explained. To validate the proposed technique, we designed a four-channel TIADC-based digital oscilloscope with a sampling rate of 10 GS/s. Based on this instrumentation platform, (i) calibration algorithm was implemented by hardware; and (ii) a test platform consisting of advanced instruments and tools was setup to testify the effect and robustness of proposed algorithm. Moreover, the technical details of instrumentation are described for the first time. The experimental results show that the calibration algorithm significantly suppresses the distortions due to timing skew mismatch error. The TIADC-based instrumentation achieves spurious-free dynamic range of 52.48 dB and effective number of bits of 5.83 bit, respectively. Besides, the complexity of the proposed algorithm is compared and discussed.