Aging of Current DACs and its Impact in Equalizer Circuits
Aging of Current DACs and its Impact in Equalizer Circuits
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DOI：
10.1109/irps46558.2021.9405160
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发表时间：
2021-03
期刊：
影响因子：
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通讯作者：
Tonmoy Dhar;Jitesh Poojary;R. Harjani;S. Sapatnekar
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文献类型：
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作者：
Tonmoy Dhar;Jitesh Poojary;R. Harjani;S. Sapatnekar
本文以高速链路中使用的前馈均衡器(FFE)为例，阐述了老化引起的时间退化对当前数模转换器(IDAC)的影响。老化导致当前镜像中的不匹配，而当前镜像是IDAC的匹配关键构建块，从而降低IDAC的性能。这项工作分析和建模了不匹配对IDAC性能指标的影响，并演示了这如何影响FFE行为。最后，提出了一种新的FFE重新校准方案来恢复这种退化。
This paper illustrates the impact of temporal degradations due to aging on current digital-to-analog converters (IDACs) within the context of a feed-forward equalizer (FFE) that is used in high-speed links. Aging causes mismatch in the current mirror, a matching-critical building block of IDACs, which degrades IDAC performance. The work analyzes and models the effect of mismatch over IDAC performance metrics and demonstrates how this affects FFE behavior. Finally, a novel scheme for FFE recalibration to recover from this degradation is presented.