Comparative study and optimization of synchronous and asynchronous comparators at near-threshold voltages
Comparative study and optimization of synchronous and asynchronous comparators at near-threshold voltages
复制标题
同步和异步比较器在接近阈值电压下的对比研究和优化
DOI：
10.1109/islped.2017.8009169
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Mingoo Seok
中科院分区：
文献类型：
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作者：
S. Kim;Doyun Kim;Mingoo Seok
我们优化并比较了同步和异步比较器在近阈值和标称电源电压（0.5 mV）下的性能。比较器是控制和数字信号处理（DSP）系统中决定模数转换基本性能的关键器件。虽然异步比较器被认为是较差的，但是由于撬棍电流比饱和漏极电流减少得更多，晶体管在近阈值状态下的操作赠款异步比较器机会来提高功率效率。我们提出了一种增强的异步CSDA为基础的比较器能够实现一个上级延迟与静态功耗权衡同步时钟比较器在近阈值制度，一个度量，特别是有利于事件驱动的控制系统。深入的优化和比较结果。
We optimize and compare the performance of synchronous and asynchronous comparators across near-threshold and nominal supply voltage (0.5∼1V). Comparators are the key components that determine the fundamental performance of analog-to-digital conversion in control and digital-signal processing (DSP) systems. While the asynchronous comparator has been considered inferior, operation of transistors in the near-threshold regime grants asynchronous comparators opportunities to improve power efficiency due to the more reduction in crowbar current than saturation drain current. We propose an enhanced asynchronous CSDA based comparator capable of achieving a superior latency vs. quiescent power dissipation trade-off to the synchronous clocked comparator in the near-threshold regime, a metric that is beneficial particularly to event-driven control systems. In-depth optimization and comparison results are presented.