Analysis and design of high performance frequency-interleaved ADC
Analysis and design of high performance frequency-interleaved ADC
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DOI：
10.1109/iscas.2013.6572268
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发表时间：
2013-05
期刊：
影响因子：
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通讯作者：
Lei Qiu;Yuanjin Zheng;L. Siek
中科院分区：
文献类型：
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作者：
Lei Qiu;Yuanjin Zheng;L. Siek
提出了一种频率交错ADC（FI-ADC）结构，可以避免时间交错ADC（TI-ADC）中存在的时间偏移问题。FI-ADC的分析滤波器组由低阶模拟滤波器实现，易于集成。此外，还设计了一个8通道2GS/s12位FI-ADC原型。基于无杂散动态范围（SFDR），比较了FI-ADC中模拟滤波器系数的变化和TI-ADC中时间偏移的变化。仿真结果表明，FI-ADC更适合于GHz的实现，并且所提出的FI-ADC比TI-ADC具有更好的增益失配容限。
This paper proposes a frequency-interleaved ADC (FI-ADC) architecture, which can avoid time skew problem existing in time-interleaved ADC (TI-ADC). The analysis filter bank of the FI-ADC is implemented by low order analog filters and can be integrated easily. In addition, prototype of an 8-channel 2GS/s 12-bit FI-ADC is designed. Based on the spurious-free dynamic range (SFDR), the comparison of variation of analog filter coefficients in FI-ADC and time skew in TI-ADC is done. Simulation results show that FI-ADC is more suitable for GHz implementation, and the proposed FI-ADC has a better gain mismatch tolerance than TI-ADC.