| 摘要: |
| 针对双通道时间交织模数转换器（ADC）采样系统中的通道间失配问题，提出了一种新的频域纠正补偿算法，即利用单次测量得到的不同频率处的固定补偿系数来实现时间交织ADC频响的部分补偿，并从理论和实验上分别进行了推导和可行性验证。实验结果表明：在双通道12比特2 Gsample/s时间交织ADC采样系统下，650 MHz带宽范围内的无杂散动态范围(SFDR)可以提高到40 dB |
| 关键词: 时间交织ADC 信号采样 通道间失配 干扰抑制 频响补偿 |
| DOI： |
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| 基金项目: |
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| Frequency response mismatch compensation for a two-channel time-interleaved ADC sampling system |
| HUANG Yangchao,ZHU Rui,JIANG Lei,MENG Qingwei |
| () |
| Abstract: |
| For the sub-channel mismatch problem in a two-channel time-interleaved analog to digital converter(TI-ADC),a frequency equalization algorithm for correcting the sub-channel mismatch is proposed.The algorithm uses the single measured coefficients on different frequencies to compensate the frequency response and its feasibility is verified theoretically and experimentally. Experiment results indicate that,in a two-channel 12 bit 2 Gsample/s TI-ADC system adopting the algorithm,the measured spurious free dynamic range(SFDR) can be improved to 40 dB when the input signal is limited to 650 MHz. |
| Key words: time-interleaved ADC signal sampling channel mismatch interference suppression frequency response compensation |
