This article presents an energy-efficient comparator design. The pre-amplifier adopts an inverter-based input pair powered by a floating reservoir capacitor; it realizes both current reuse and dynamic bias, thereby significantly boosting $g_{m}/I_{D}$ and reducing noise. Moreover, it greatly reduces the influence of the process corner and the input common-mode voltage on the comparator performance, including noise, offset, and delay. A prototype comparator in 180 nm achieves 46- $\mu \text{V}$ input-referred noise while consuming only 1 pJ per comparison under a 1.2-V supply. This represents greater than seven-time energy efficiency boost compared with a strong-arm (SA) latch. It achieves the highest reported comparator energy efficiency to the best of our knowledge.

中文翻译：

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一种带动态浮动逆变放大器的节能比较器

本文介绍了一种高能效比较器设计。前置放大器采用基于逆变器的输入对，由浮动存储电容器供电；它实现了电流重用和动态偏置，从而显着提升 $g_{m}/I_{D}$ 和降低噪音。而且，它大大降低了工艺拐角和输入共模电压对比较器性能的影响，包括噪声、偏移和延迟。180 nm 的原型比较器实现了 46- $\mu \text{V}$ 输入参考噪声，同时在 1.2V 电源下每次比较仅消耗 1 pJ。与强臂 (SA) 锁存器相比，这代表了超过七倍的能效提升。据我们所知，它实现了最高的比较器能效。